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Chunwen Sun
School of Chemistry and Chemical Engineering, Center on Nanoenergy Research, Guangxi University, Nanning, P. R. China

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Research article
Published: 16 April 2021 in Materials Chemistry Frontiers
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Chlorine doping is an effective approach for improving performance of Li1.3Al0.3Ti1.7(PO4)3 (LATP) electrolyte. Compared with that of the LATP electrolyte, the lithium battery with LATP-0.4Cl exhibits good rate performance and cycling stability.

ACS Style

Shuyuan Li; Zhongyuan Huang; Yinguo Xiao; Chunwen Sun. Chlorine-doped Li1.3Al0.3Ti1.7(PO4)3 as an electrolyte for solid lithium metal batteries. Materials Chemistry Frontiers 2021, 1 .

AMA Style

Shuyuan Li, Zhongyuan Huang, Yinguo Xiao, Chunwen Sun. Chlorine-doped Li1.3Al0.3Ti1.7(PO4)3 as an electrolyte for solid lithium metal batteries. Materials Chemistry Frontiers. 2021; ():1.

Chicago/Turabian Style

Shuyuan Li; Zhongyuan Huang; Yinguo Xiao; Chunwen Sun. 2021. "Chlorine-doped Li1.3Al0.3Ti1.7(PO4)3 as an electrolyte for solid lithium metal batteries." Materials Chemistry Frontiers , no. : 1.

Research article
Published: 09 April 2021 in Advanced Energy and Sustainability Research
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The development of high performance and low cost bifunctional electrocatalysts is still challenging for solving current energy and environmental problems. However, most electrocatalysts require complex synthesis processes, which prohibit mass production. Here, NiCoFeP nanofibers are synthesized by phosphating the electrospun Ni,Co precursor nanofibers and subsequent displacement reaction of Ni and Fe3+ via impregnation of Fe(NO3)3 solution. The obtained NiCoFeP nanofibers catalyst possesses high intrinsic activity, abundant active cites and superior kinetics, which shows excellent OER performance with low overpotential of 0.24 V at 50 mA cm‐2 in 1 M KOH solution. It also exhibits a long‐term cycling performance for 200 h at 10 mA cm−2 as the cathode for zinc‐air battery. Furthermore, we demonstrate that this displacement reaction method is also suitable for preparing other catalysts NiMnP and NiCuP to enhance their OER performance. This work presents a novel approach for the fabrication of multimetallic catalysts for electrocatalysis.

ACS Style

Juanjuan Bian; Chunwen Sun. NiCoFeP Nanofibers as an Efficient Electrocatalyst for Oxygen Evolution Reaction and Zinc–Air Batteries. Advanced Energy and Sustainability Research 2021, 2, 2000104 .

AMA Style

Juanjuan Bian, Chunwen Sun. NiCoFeP Nanofibers as an Efficient Electrocatalyst for Oxygen Evolution Reaction and Zinc–Air Batteries. Advanced Energy and Sustainability Research. 2021; 2 (6):2000104.

Chicago/Turabian Style

Juanjuan Bian; Chunwen Sun. 2021. "NiCoFeP Nanofibers as an Efficient Electrocatalyst for Oxygen Evolution Reaction and Zinc–Air Batteries." Advanced Energy and Sustainability Research 2, no. 6: 2000104.

Research article
Published: 03 March 2021 in ACS Applied Materials & Interfaces
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Lithium metal is considered as the ideal anode for next-generation rechargeable batteries due to its highest theoretical specific capacity and lowest electrochemical potential. However, lithium dendrite growth during lithium deposition could lead to a short circuit and even cause severe safety issues. Here, we use solid-state electrolyte Li3InCl6 as an additive in nonaqueous electrolytes because of its high ionic conductivity (10–3 to 10–4 S cm–1) and good electrochemical stability. It is found that Li3InCl6 can in situ react with metallic lithium to form a ternary composite solid electrolyte interphase (SEI) consisting of a Li–In alloy, LiCl, and codeposited Li3InCl6. The composite SEI can effectively suppress Li dendrite growth and thereby maintain stable long-term cycling performance in lithium metal batteries. The protected lithium electrode exhibits stable cycling performance in a symmetric Li|Li battery for nearly 1000 h at a current density of 1 mA cm–2. Besides, the full battery with a LiFePO4 cathode and a metallic lithium anode delivers a stable capacity of 140.6 mA h g–1 for 500 cycles with a capacity retention of 95%. The Li|S battery with Li3InCl6-added LiTFSI in 1,3-dioxolane/1,2-dimethoxyethane electrolyte also shows significant improvement in capacity retention at 0.5 C. This work demonstrates an effective approach to design dendrite-free metal anodes.

ACS Style

Yingzhen Zhang; Chunwen Sun. Composite Lithium Protective Layer Formed In Situ for Stable Lithium Metal Batteries. ACS Applied Materials & Interfaces 2021, 13, 12099 -12105.

AMA Style

Yingzhen Zhang, Chunwen Sun. Composite Lithium Protective Layer Formed In Situ for Stable Lithium Metal Batteries. ACS Applied Materials & Interfaces. 2021; 13 (10):12099-12105.

Chicago/Turabian Style

Yingzhen Zhang; Chunwen Sun. 2021. "Composite Lithium Protective Layer Formed In Situ for Stable Lithium Metal Batteries." ACS Applied Materials & Interfaces 13, no. 10: 12099-12105.

Research article
Published: 09 December 2020 in ACS Applied Energy Materials
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For the application of sodium batteries, one challenge is the irregular deposition and dendrite growth during the cycling process. Herein, we report that spontaneous alloying reactions can occur by the mechanical mixing and pressing processes of the sodium metal and semimetal bismuth powder, which can regulate the deposition of sodium ions. The improvement of the surface tension and affinity to sodium ions of the metal electrode can inhibit the dendrite growth. The alloy anode can be used not only in carbonate-based electrolytes but also in the flame-retardant electrolyte. We demonstrate that the Na–Bi alloy electrode in a carbonate electrolyte keeps stable cyclability with a much lower overpotential of 20 mV for more than 1200 h. The voltage hysteresis can be effectively reduced by using the Na–Bi alloy anode. The Na3V2(PO4)3 electrode with a flame-retardant electrolyte shows a Coulombic efficiency of 99.9% at 585 mA g–1 during long cycles. It still shows an impressive capacity retention of 95%.

ACS Style

Guopeng Yang; Nianwu Li; Chunwen Sun. High-Performance Sodium Metal Batteries with Sodium–Bismuth Alloy Anode. ACS Applied Energy Materials 2020, 3, 12607 -12612.

AMA Style

Guopeng Yang, Nianwu Li, Chunwen Sun. High-Performance Sodium Metal Batteries with Sodium–Bismuth Alloy Anode. ACS Applied Energy Materials. 2020; 3 (12):12607-12612.

Chicago/Turabian Style

Guopeng Yang; Nianwu Li; Chunwen Sun. 2020. "High-Performance Sodium Metal Batteries with Sodium–Bismuth Alloy Anode." ACS Applied Energy Materials 3, no. 12: 12607-12612.

Journal article
Published: 04 December 2020 in Journal of Power Sources
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Aqueous rechargeable Zn-ion batteries (ARZIBs) are attractive due to their low cost, high safety and environmental friendliness. However, the development of ARZIBs still faces many challenges. One of the biggest challenges is to find suitable cathode materials for reversible Zn2+ ions insertion/extraction. In this work, we synthesize a Prussian blue analogue (PBA) with a new chemical composition, vanadium hexacyanoferrate (VHCF), via a simple co-precipitation method and study its performance as a cathode material for an aqueous rechargeable Zn-ion battery. The VHCF with two electrochemical redox active sites, V and Fe, delivers a three-electron redox reaction with a capacity of 187 mA h g−1 at current density of 0.5 A g−1. Even at a current rate of 5 A g−1, VHCF can still deliver a large capacity of 122 mA h g−1. The Zn//VHCF battery also exhibits a long cycle life of 1000 cycles with excellent capacity retention of 87.8% and a high Coulombic efficiency close to 100%. During the first charging process, the cubic structure of VHCF changes to a rhombohedral phase, a structure where the Zn2+ ions can be reversibly inserted into and extracted from in subsequent cycles. The promising performances make VHCF an attractive candidate as cathode material for ARZIBs system.

ACS Style

Yanjun Zhang; Yao Wang; Liang Lu; Chunwen Sun; Denis Y.W. Yu. Vanadium hexacyanoferrate with two redox active sites as cathode material for aqueous Zn-ion batteries. Journal of Power Sources 2020, 484, 229263 .

AMA Style

Yanjun Zhang, Yao Wang, Liang Lu, Chunwen Sun, Denis Y.W. Yu. Vanadium hexacyanoferrate with two redox active sites as cathode material for aqueous Zn-ion batteries. Journal of Power Sources. 2020; 484 ():229263.

Chicago/Turabian Style

Yanjun Zhang; Yao Wang; Liang Lu; Chunwen Sun; Denis Y.W. Yu. 2020. "Vanadium hexacyanoferrate with two redox active sites as cathode material for aqueous Zn-ion batteries." Journal of Power Sources 484, no. : 229263.

Research article
Published: 03 November 2020 in Inorganic Chemistry Frontiers
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A quasi-solid-state electrolyte based on LATP-PVDF-HFP nanofiber matrix and gel is proposed. The fabricated battery exhibits a good discharge capacity of 146.6 mA h g−1 at 2C, while the capacity retention can reach 97% after 300 cycles at 0.5C.

ACS Style

Shuyuan Li; Nianwu Li; Chunwen Sun. A flexible three-dimensional composite nanofiber enhanced quasi-solid electrolyte for high-performance lithium metal batteries. Inorganic Chemistry Frontiers 2020, 8, 361 -367.

AMA Style

Shuyuan Li, Nianwu Li, Chunwen Sun. A flexible three-dimensional composite nanofiber enhanced quasi-solid electrolyte for high-performance lithium metal batteries. Inorganic Chemistry Frontiers. 2020; 8 (2):361-367.

Chicago/Turabian Style

Shuyuan Li; Nianwu Li; Chunwen Sun. 2020. "A flexible three-dimensional composite nanofiber enhanced quasi-solid electrolyte for high-performance lithium metal batteries." Inorganic Chemistry Frontiers 8, no. 2: 361-367.

Journal article
Published: 27 October 2020 in Sustainability
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Driver’s driving actions on pedals can be regarded as an expression of driver’s acceleration/deceleration intention. Quickly and accurately detecting driving action intensity on pedals can have great contributions in preventing road traffic accidents and managing the energy consumption. In this paper, we report a pressure-sensitive and self-powered material named triboelectric nano-generators (TENGs). The generated voltage data of TENGs, which is associated with the pedal action, can be collected easily and stored sequentially. According to the characteristics of the voltage data, we have employed a hybrid machine learning method. After collecting signals from TENGs and driving simulator simultaneously, an unsupervised Gaussian mixture model is used to cluster the pedal events automatically using data from simulator. Then, multi-feature candidates of the voltage data from TENGs are extracted and ranked. A supervised random forest model that treats voltage data of TENGs as input data is trained and tested. Results show that data from TENGs can have a high accuracy of more than 90% using the random forest algorithm. The evaluating results demonstrate the accuracy of the proposed data-driven hybrid learning algorithm for recognition of driver’s pedal action intensity. Furthermore, technical and economic characteristics of TENGs and some common sensors are compared and discussed. This work may demonstrate the feasibility of using these data-driven methods on the detection of driver’s pedal action intensity.

ACS Style

Qian Cheng; Xiaobei Jiang; Haodong Zhang; Wuhong Wang; Chunwen Sun. Data-Driven Detection Methods on Driver’s Pedal Action Intensity Using Triboelectric Nano-Generators. Sustainability 2020, 12, 8926 .

AMA Style

Qian Cheng, Xiaobei Jiang, Haodong Zhang, Wuhong Wang, Chunwen Sun. Data-Driven Detection Methods on Driver’s Pedal Action Intensity Using Triboelectric Nano-Generators. Sustainability. 2020; 12 (21):8926.

Chicago/Turabian Style

Qian Cheng; Xiaobei Jiang; Haodong Zhang; Wuhong Wang; Chunwen Sun. 2020. "Data-Driven Detection Methods on Driver’s Pedal Action Intensity Using Triboelectric Nano-Generators." Sustainability 12, no. 21: 8926.

Journal article
Published: 09 October 2020 in Nano Energy
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The sensor-based early recognition of driver’s driving actions on steering wheels is a complementary means of Intelligent Driver Assistance Systems (IDAS), which can help prevent traffic accidents. In this paper, using triboelectric nanogenerator (TENG) as sensor for detecting driver’s steering actions is studied. Two driving simulator based experiments are designed and conducted. First, response speed of three sensors (driving simulator, camera and TENG) is quantified and compared. Then, a machine learning algorithm is designed and trained to detect three types of steering actions. Using this algorithm, electrical signals from TENGs can be used to detect driver’s steering actions. Our results show that TENG has the fastest response speed statistically. The trained algorithm has an accuracy of 92.0% in test dataset. This study may demonstrate the potential in using TENG as sensor for driver’s steering action detection.

ACS Style

Haodong Zhang; Qian Cheng; Xiao Lu; Wuhong Wang; Zhong Lin Wang; Chunwen Sun. Detection of driving actions on steering wheel using triboelectric nanogenerator via machine learning. Nano Energy 2020, 79, 105455 .

AMA Style

Haodong Zhang, Qian Cheng, Xiao Lu, Wuhong Wang, Zhong Lin Wang, Chunwen Sun. Detection of driving actions on steering wheel using triboelectric nanogenerator via machine learning. Nano Energy. 2020; 79 ():105455.

Chicago/Turabian Style

Haodong Zhang; Qian Cheng; Xiao Lu; Wuhong Wang; Zhong Lin Wang; Chunwen Sun. 2020. "Detection of driving actions on steering wheel using triboelectric nanogenerator via machine learning." Nano Energy 79, no. : 105455.

Journal article
Published: 10 September 2020 in Nano Energy
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The ever-increasing automobiles have caused large number of traffic accidents every year. Fatigue driving and distracted driving are two main reasons for most of traffic accidents. Thus, intelligent transportation has attracted much attention. In this work, a stretchable polyacrylamide (PAAM) -LiCl-based triboelectric nanogenerator (PL-TENG) is utilized for the first time to monitor driver fatigue and distraction by attaching them to the face and neck of a driver. These PL-TENG sensors can detect eye closure, mouth closure, and neck rotation with high accuracy. Eye blink duration (BD), blink interval duration (BID), percentage of eyelid closure over time (PERCLOS) and yawn frequency (YF) are chosen as indicators of driver fatigue, while mouth closure and head positioning are chosen as indicators of driver distraction. The PL-TENG sensor has the characteristics of high voltage, high sensitivity and good biocompatibility, which demonstrates that the PL-TENG sensors are more sensitive than traditional fatigue detection systems. This work paves a new way for designing highly sensitive self-powered sensor in an intelligent transportation system.

ACS Style

Xiao Lu; Li Zheng; Haodong Zhang; Wuhong Wang; Zhong Lin Wang; Chunwen Sun. Stretchable, transparent triboelectric nanogenerator as a highly sensitive self-powered sensor for driver fatigue and distraction monitoring. Nano Energy 2020, 78, 105359 .

AMA Style

Xiao Lu, Li Zheng, Haodong Zhang, Wuhong Wang, Zhong Lin Wang, Chunwen Sun. Stretchable, transparent triboelectric nanogenerator as a highly sensitive self-powered sensor for driver fatigue and distraction monitoring. Nano Energy. 2020; 78 ():105359.

Chicago/Turabian Style

Xiao Lu; Li Zheng; Haodong Zhang; Wuhong Wang; Zhong Lin Wang; Chunwen Sun. 2020. "Stretchable, transparent triboelectric nanogenerator as a highly sensitive self-powered sensor for driver fatigue and distraction monitoring." Nano Energy 78, no. : 105359.

Article
Published: 07 September 2020 in ChemElectroChem
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Development of low cost, efficient, noble metal free electrocatalysts for oxygen evolution reaction (OER) is important for renewable energy conversion. Herein, we prepared hierarchical hollow NiCoMn‐LDH microcuboids consisted of two dimensional (2D) nanosheets by a solvothermal method. The prepared Ni 6 Co 11 Mn‐LDH exhibits high OER activity, which show an overpotential of 248 mV at a current density of 10 mA cm ‐2 and a small Tafel slope of 72.2 mV dec ‐1 , even better than the noble metal RuO 2 catalyst. It remains stable after chronopotentiometric test at a high current density of 100 mA cm ‐2 for 22 hours, indicating a potential practical application. The enhanced OER performance is ascribed to the transition of Ni 2+ to Ni 3+ in NiCo‐LDH induced by doping Mn, which activates the Ni sites. This work provides an approach to further optimizing the OER performance of NiCo‐LDH based catalysts.

ACS Style

Tongrui Zhang; Haifu Huang; Junxing Han; Faxin Yan; Chunwen Sun. Mn doped hollow layered double (Ni, Co) hydroxide microcuboids as an efficient electrocatalyst for oxygen evolution reaction. ChemElectroChem 2020, 7, 1 .

AMA Style

Tongrui Zhang, Haifu Huang, Junxing Han, Faxin Yan, Chunwen Sun. Mn doped hollow layered double (Ni, Co) hydroxide microcuboids as an efficient electrocatalyst for oxygen evolution reaction. ChemElectroChem. 2020; 7 (18):1.

Chicago/Turabian Style

Tongrui Zhang; Haifu Huang; Junxing Han; Faxin Yan; Chunwen Sun. 2020. "Mn doped hollow layered double (Ni, Co) hydroxide microcuboids as an efficient electrocatalyst for oxygen evolution reaction." ChemElectroChem 7, no. 18: 1.

Review
Published: 14 August 2020 in Research
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Oxygen reduction reaction (ORR) plays significant roles in electrochemical energy storage and conversion systems as well as clean synthesis of fine chemicals. However, the ORR process shows sluggish kinetics and requires platinum-group noble metal catalysts to accelerate the reaction. The high cost, rare reservation, and unsatisfied durability significantly impede large-scale commercialization of platinum-based catalysts. Single-atom electrocatalysts (SAECs) featuring with well-defined structure, high intrinsic activity, and maximum atom efficiency have emerged as a novel field in electrocatalytic science since it is promising to substitute expensive platinum-group noble metal catalysts. However, finely fabricating SAECs with uniform and highly dense active sites, fully maximizing the utilization efficiency of active sites, and maintaining the atomically isolated sites as single-atom centers under harsh electrocatalytic conditions remain urgent challenges. In this review, we summarized recent advances of SAECs in synthesis, characterization, oxygen reduction reaction (ORR) performance, and applications in ORR-related H2O2 production, metal-air batteries, and low-temperature fuel cells. Relevant progress on tailoring the coordination structure of isolated metal centers by doping other metals or ligands, enriching the concentration of single-atom sites by increasing metal loadings, and engineering the porosity and electronic structure of the support by optimizing the mass and electron transport are also reviewed. Moreover, general strategies to synthesize SAECs with high metal loadings on practical scale are highlighted, the deep learning algorithm for rational design of SAECs is introduced, and theoretical understanding of active-site structures of SAECs is discussed as well. Perspectives on future directions and remaining challenges of SAECs are presented.

ACS Style

Junxing Han; Juanjuan Bian; Chunwen Sun. Recent Advances in Single-Atom Electrocatalysts for Oxygen Reduction Reaction. Research 2020, 2020, 1 -51.

AMA Style

Junxing Han, Juanjuan Bian, Chunwen Sun. Recent Advances in Single-Atom Electrocatalysts for Oxygen Reduction Reaction. Research. 2020; 2020 ():1-51.

Chicago/Turabian Style

Junxing Han; Juanjuan Bian; Chunwen Sun. 2020. "Recent Advances in Single-Atom Electrocatalysts for Oxygen Reduction Reaction." Research 2020, no. : 1-51.

Journal article
Published: 11 August 2020 in SCIENTIA SINICA Chimica
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Sodium batteries have attracted much attention owing to their abundant reserves and low cost of Na raw materials and diverse sources of electrode materials. However, even if no external factors are applied, sodium batteries might fail in a certain probability during the normal operation, which exhibits the failure modes of electrochemical performance decay and the component destruction of the batteries, resulting in these failure consequences such as battery thermal runaway, short circuit, fire etc. In this paper, various failure causes are analyzed for the components of sodium batteries like cathodes, anodes, electrolytes, separators, current collectors and the case of the sodium battery, according to the theoretical failure chain model of failure mode and effect analysis (FMEA) technology. Progress of sodium battery failure research is summarized based on above sodium battery components. Moreover, the failure analysis process of sodium batteries is also proposed. The sodium battery failure analysis system is finally proposed. It will provide the informations for the failure research, safe use, design and manufacture of sodium batteries.

ACS Style

Donghao Cheng; Chunwen Sun; Lili Feng; Tianshui Yu. Progress of sodium battery failure research. SCIENTIA SINICA Chimica 2020, 50, 1801 -1815.

AMA Style

Donghao Cheng, Chunwen Sun, Lili Feng, Tianshui Yu. Progress of sodium battery failure research. SCIENTIA SINICA Chimica. 2020; 50 (12):1801-1815.

Chicago/Turabian Style

Donghao Cheng; Chunwen Sun; Lili Feng; Tianshui Yu. 2020. "Progress of sodium battery failure research." SCIENTIA SINICA Chimica 50, no. 12: 1801-1815.

Journal article
Published: 11 August 2020 in Applied Catalysis B: Environmental
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Single-atom Fe-N-C electrocatalysts have emerged as the most promising oxygen reduction reaction (ORR) catalyst. However, the low Fe loading and inaccessibility of Fe-N-C sites limit the overall ORR activity. Here, we report an efficient single-atom electrocatalyst (Fe-N-C/N-OMC) with Fe-N-C sites embedded in three-dimensional (3D) N-doped ordered mesoporous carbon framework. Fe-N-C/N-OMC shows high half-wave potential, kinetic current density, turnover frequency and mass activity towards ORR in alkaline electrolyte. Experiments and theoretical calculations suggest that the ultra-high ORR activity stems from the boosted intrinsic activity of FeN4 sites by graphitic N dopants, high density of accessible active site generated by high Fe and N loadings and ordered mesoporous carbon structure as well as facilitated mass and electron transport in 3D interconnected pores. Fe-N-C/N-OMC also shows comparable ORR activity to Pt/C in acidic electrolyte. As the cathode for zinc-air battery, Fe-N-C/N-OMC exhibits high open-circuit voltage, high power density and remarkable durability.

ACS Style

Junxing Han; Hongliang Bao; Jian-Qiang Wang; Lirong Zheng; Shaorui Sun; Zhong Lin Wang; Chunwen Sun. 3D N-doped ordered mesoporous carbon supported single-atom Fe-N-C catalysts with superior performance for oxygen reduction reaction and zinc-air battery. Applied Catalysis B: Environmental 2020, 280, 119411 .

AMA Style

Junxing Han, Hongliang Bao, Jian-Qiang Wang, Lirong Zheng, Shaorui Sun, Zhong Lin Wang, Chunwen Sun. 3D N-doped ordered mesoporous carbon supported single-atom Fe-N-C catalysts with superior performance for oxygen reduction reaction and zinc-air battery. Applied Catalysis B: Environmental. 2020; 280 ():119411.

Chicago/Turabian Style

Junxing Han; Hongliang Bao; Jian-Qiang Wang; Lirong Zheng; Shaorui Sun; Zhong Lin Wang; Chunwen Sun. 2020. "3D N-doped ordered mesoporous carbon supported single-atom Fe-N-C catalysts with superior performance for oxygen reduction reaction and zinc-air battery." Applied Catalysis B: Environmental 280, no. : 119411.

Research article
Published: 07 August 2020 in ACS Applied Materials & Interfaces
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In order to satisfy the increasing requirements on operation time of wearable and portable electronic devices, novel self-powered systems by integrating triboelectric nanogenerator (TENG) with energy storage device have emerged as a promising technology to provide sustainable power. Here, a flexible sodium composite anode ([email protected]) was prepared by infusing the molten sodium into flexible sodiophilic carbon cloths. The symmetric cell with [email protected] anode shows stable sodium plating and stripping for 400 h. The full cell with flexible quasi-solid-state electrolyte, Na3V2(PO4)[email protected] nanofiber cathode and [email protected] anode delivers excellent rate capacity of 72.5 mAh g-1 at 5 C and also exhibits stable cycling performance under different bent degrees. By combining with TENG to form a self-power system, the flexible quasi-solid-state sodium battery can effectively store the pulse current, and shows stable discharging capacity for over 100 cycles. The advanced flexible battery demonstrates its capability as a promising energy storage part in combination with TENGs and shows great potential in powerful flexible self-power systems.

ACS Style

Yao Lu; Liang Lu; Genrui Qiu; Chunwen Sun. Flexible Quasi-Solid-State Sodium Battery for Storing Pulse Electricity Harvested from Triboelectric Nanogenerators. ACS Applied Materials & Interfaces 2020, 12, 1 .

AMA Style

Yao Lu, Liang Lu, Genrui Qiu, Chunwen Sun. Flexible Quasi-Solid-State Sodium Battery for Storing Pulse Electricity Harvested from Triboelectric Nanogenerators. ACS Applied Materials & Interfaces. 2020; 12 (35):1.

Chicago/Turabian Style

Yao Lu; Liang Lu; Genrui Qiu; Chunwen Sun. 2020. "Flexible Quasi-Solid-State Sodium Battery for Storing Pulse Electricity Harvested from Triboelectric Nanogenerators." ACS Applied Materials & Interfaces 12, no. 35: 1.

Paper
Published: 31 July 2020 in Catalysis Science & Technology
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Herein, the energy band of the Au nanoparticles/MoS2 nanosheets is modulated by ultrasonic vibration to induce piezoelectric catalytic effect, which effectively enhances the OER performance and dye decomposition reaction.

ACS Style

Juanjuan Bian; Chunwen Sun. Piezotronic-enhanced oxygen evolution reaction enabled by a Au/MoS2 nanosheet catalyst. Catalysis Science & Technology 2020, 10, 1 .

AMA Style

Juanjuan Bian, Chunwen Sun. Piezotronic-enhanced oxygen evolution reaction enabled by a Au/MoS2 nanosheet catalyst. Catalysis Science & Technology. 2020; 10 (18):1.

Chicago/Turabian Style

Juanjuan Bian; Chunwen Sun. 2020. "Piezotronic-enhanced oxygen evolution reaction enabled by a Au/MoS2 nanosheet catalyst." Catalysis Science & Technology 10, no. 18: 1.

Research article
Published: 02 June 2020 in ACS Applied Materials & Interfaces
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Solid-state lithium metal batteries (SSLMBs) are an emerging technology because they can effectively solve the safety problem facing the lithium-ion batteries with nonaqueous liquid electrolyte. However, the lithium dendrite problem in SSLMBs can still occur at the sites of grain boundaries and defects. It is reported that effective charge procedures enable to suppress the growth of lithium dendrite, especially the pulse charging mode. In this work, SSLMBs were charged by a vertical contact-separation triboelectric nanogenerator (TENG). The effects of the pulse current on the lithium dendrite growth of SSLMBs are studied. It is found that the lithium ions can diffuse uniformly during the intermittent period of the pulse current compared to the constant current charge, so the growth rate of the lithium dendrites is effectively inhibited by the pulse current. At the same time, it is found that the lower the frequency of TENG is, the slower the growth rate of lithium dendrites is. This work provides a guideline for designing an appropriate charging method for durable SSLMBs.

ACS Style

Genrui Qiu; Liang Lu; Yao Lu; Chunwen Sun. Effects of Pulse Charging by Triboelectric Nanogenerators on the Performance of Solid-State Lithium Metal Batteries. ACS Applied Materials & Interfaces 2020, 12, 28345 -28350.

AMA Style

Genrui Qiu, Liang Lu, Yao Lu, Chunwen Sun. Effects of Pulse Charging by Triboelectric Nanogenerators on the Performance of Solid-State Lithium Metal Batteries. ACS Applied Materials & Interfaces. 2020; 12 (25):28345-28350.

Chicago/Turabian Style

Genrui Qiu; Liang Lu; Yao Lu; Chunwen Sun. 2020. "Effects of Pulse Charging by Triboelectric Nanogenerators on the Performance of Solid-State Lithium Metal Batteries." ACS Applied Materials & Interfaces 12, no. 25: 28345-28350.

Review
Published: 04 May 2020 in Advanced Energy Materials
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Professor John B. Goodenough started his research on perovskite‐type oxides working on random‐access memory with ceramic [La,M(II)]MnO3 in the Lincoln Laboratory, Massachusetts Institute of Technology, more than 60 years ago. Since then perovskite‐type oxides have played vital roles in the field of energy conversion and storage. In this review, a brief overview is given on the structure, defect chemistry, and transport properties of perovskite oxides, especially the mixed‐valent materials with mixed electronic and ionic conductivities. The recent advances of perovskite oxides applications in the oxygen reduction reaction, oxygen evolution reaction, electrochemical water splitting reaction, metal–air batteries, solid‐state batteries, oxygen separation membranes, and solid oxide fuel cells are highlighted. Moreover, some novel design strategies for optimizing performance, like interface engineering, defect engineering, strain modulation are discussed as well. Finally, a perspective is given on how to design high‐performance perovskite oxide based materials for energy conversion and storage applications as well as the challenges involved in this task.

ACS Style

Chunwen Sun; Jose A. Alonso; Juanjuan Bian. Recent Advances in Perovskite‐Type Oxides for Energy Conversion and Storage Applications. Advanced Energy Materials 2020, 11, 1 .

AMA Style

Chunwen Sun, Jose A. Alonso, Juanjuan Bian. Recent Advances in Perovskite‐Type Oxides for Energy Conversion and Storage Applications. Advanced Energy Materials. 2020; 11 (2):1.

Chicago/Turabian Style

Chunwen Sun; Jose A. Alonso; Juanjuan Bian. 2020. "Recent Advances in Perovskite‐Type Oxides for Energy Conversion and Storage Applications." Advanced Energy Materials 11, no. 2: 1.

Journal article
Published: 05 March 2020 in Nano Energy
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Designing highly efficient electrocatalysts with superior performance on electrochemical water splitting and rechargeable metal-air batteries is an urgent and challenging task due to required large overpotentials. A pulsed direct current with high voltage produced by a layered triboelectric nanogenerator (TENG) provides a novel type of power sources to electrodeposit sub-2 nm Pt nanoclusters onto NiFe-LDH nanosheets in the absence of any capping reagents to improve hydrogen evolution reaction (HER) activity and to electronically reduce part of Fe3+ cations in the lattice of NiFe-LDH to Fe2+ species to enhance oxygen evolution reaction (OER) activity. The particle size of Pt nanoclusters could be easily tuned from 0.8 nm to 1.2 nm by alternating the working frequency of the layered TENG. By loading sub-2 nm Pt nanoclusters onto NiFe-LDH (Pt–NiFe-LDH), the HER overpotential drops from 345 mV to 86 mV at a current density of 50 mA cm−2 in alkaline electrolyte. The synergistic effect between Pt nanoclusters and NiFe-LDH nanosheets on enhancing the cleavage of HO–H bond and recombination of hydrogen intermediates to form molecular hydrogen dramatically improves the HER activity. Meanwhile, benefiting from tuning the local atomic structure and crystal defects by reducing Fe3+ to Fe2+, NiFe-LDH nanosheets demonstrates enhanced OER activity. The deposited sub-2 nm Pt nanoclusters also produces elevated oxygen reduction reaction (ORR) activity with a half-wave potential of 0.84 V (vs RHE). Hence, the as-prepared Pt–NiFe-LDH catalysts exhibits tri-functional properties towards HER, ORR and OER and could be used as the electrode catalysts for overall electrocatalytic water splitting and rechargeable zinc-air batteries. With the optimal catalyst (Pt–NiFe-LDH-0.5-12) as the electrode for overall water splitting, the potential difference between OER and HER drops to 1.63 V at a current density of 50 mA cm−2, much lower than that of the mixed noble-metal catalysts (Pt/C and RuO2, 1.98 V). As an air electrode of rechargeable zinc-air batteries, Pt–NiFe-LDH-0.5-12 exhibits much better performance than that of bare NiFe-LDH in terms of higher open-circuit voltage, higher round-trip efficiency and durability.

ACS Style

Junxing Han; Xiaoyi Meng; Liang Lu; Zhong Lin Wang; Chunwen Sun. Triboelectric nanogenerators powered electrodepositing tri-functional electrocatalysts for water splitting and rechargeable zinc-air battery: A case of Pt nanoclusters on NiFe-LDH nanosheets. Nano Energy 2020, 72, 104669 .

AMA Style

Junxing Han, Xiaoyi Meng, Liang Lu, Zhong Lin Wang, Chunwen Sun. Triboelectric nanogenerators powered electrodepositing tri-functional electrocatalysts for water splitting and rechargeable zinc-air battery: A case of Pt nanoclusters on NiFe-LDH nanosheets. Nano Energy. 2020; 72 ():104669.

Chicago/Turabian Style

Junxing Han; Xiaoyi Meng; Liang Lu; Zhong Lin Wang; Chunwen Sun. 2020. "Triboelectric nanogenerators powered electrodepositing tri-functional electrocatalysts for water splitting and rechargeable zinc-air battery: A case of Pt nanoclusters on NiFe-LDH nanosheets." Nano Energy 72, no. : 104669.

Book chapter
Published: 28 February 2020 in Advances in Solid Oxide Fuel Cells III
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Solid oxide fuel cells (SOFCs) are electrochemical reactors that can directly convert a chemical fuel to electrical power with high efficiency and in an environment‐friendly way. The recent progress of SOFC concerns the use of available hydrocarbon fuels, such as natural gas. The most commonly used anode material Ni/yttria‐stabilized zirconia (YSZ) cermet exhibits some disadvantages when hydrocarbons were used as fuels. Thus it is necessary to develop alternative anode materials that display mixed conduction under fuel conditions. Understanding the reaction mechanism and kinetics that occur on the anode is very important for the development and optimization of anode materials. This chapter gives a brief review of the recent developments of the anode in SOFCs, mainly focusing on the materials aspect. In addition, the mechanism and kinetics of fuel oxidation reactions are also addressed. Present personal perspectives on the future research directions of this area are provided as well.

ACS Style

Chunwen Sun. Anodes for Solid Oxide Fuel Cell. Advances in Solid Oxide Fuel Cells III 2020, 113 -144.

AMA Style

Chunwen Sun. Anodes for Solid Oxide Fuel Cell. Advances in Solid Oxide Fuel Cells III. 2020; ():113-144.

Chicago/Turabian Style

Chunwen Sun. 2020. "Anodes for Solid Oxide Fuel Cell." Advances in Solid Oxide Fuel Cells III , no. : 113-144.

Full paper
Published: 24 February 2020 in Advanced Sustainable Systems
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Designing active, stable, yet low cost electrocatalysts for the oxygen evolution reaction (OER) is pivotal to the next generation energy storage technology. However, conventional OER catalysts are of low electrochemical efficiency while the state‐of‐the‐art nanoparticle‐based catalysts require mechanical supports, thereby limiting their wide deployment. Here, it is demonstrated that, due to the excellent corrosion resistance of the Fe–Co–Ni–Cr–Nb high entropy intermetallic Laves phase, fabricating a high entropy bulk porous nanostructure is possible by dealloying the corresponding eutectic alloy precursor. As a result, a core–shell nanostructure with amorphous high entropy oxide ultrathin films wrapped around the nanosized intermetallic ligaments is obtained, which together, exhibits an extraordinarily large active surface area, fast dynamics, and superb long‐term durability, outperforming the existing alloy‐ and ceramic‐based OER electrocatalysts. The outcome of the research suggests that the paradigm of “high entropy” design can be used to develop high performance catalytic materials.

ACS Style

Zhaoyi Ding; Juanjuan Bian; Shuo Shuang; Xiaodi Liu; Yuanchao Hu; Chunwen Sun; Yong Yang. High Entropy Intermetallic–Oxide Core–Shell Nanostructure as Superb Oxygen Evolution Reaction Catalyst. Advanced Sustainable Systems 2020, 4, 1 .

AMA Style

Zhaoyi Ding, Juanjuan Bian, Shuo Shuang, Xiaodi Liu, Yuanchao Hu, Chunwen Sun, Yong Yang. High Entropy Intermetallic–Oxide Core–Shell Nanostructure as Superb Oxygen Evolution Reaction Catalyst. Advanced Sustainable Systems. 2020; 4 (5):1.

Chicago/Turabian Style

Zhaoyi Ding; Juanjuan Bian; Shuo Shuang; Xiaodi Liu; Yuanchao Hu; Chunwen Sun; Yong Yang. 2020. "High Entropy Intermetallic–Oxide Core–Shell Nanostructure as Superb Oxygen Evolution Reaction Catalyst." Advanced Sustainable Systems 4, no. 5: 1.