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Yanhai Du; Dhruba Panthi; Sulata Sahu; Hai Feng; Patrick Baker. Design and 3D Printing of Controllable and Gradient Porous Supports for Solid Oxide Fuel Cells. ECS Meeting Abstracts 2021, MA2021-03, 17 -17.
AMA StyleYanhai Du, Dhruba Panthi, Sulata Sahu, Hai Feng, Patrick Baker. Design and 3D Printing of Controllable and Gradient Porous Supports for Solid Oxide Fuel Cells. ECS Meeting Abstracts. 2021; MA2021-03 (1):17-17.
Chicago/Turabian StyleYanhai Du; Dhruba Panthi; Sulata Sahu; Hai Feng; Patrick Baker. 2021. "Design and 3D Printing of Controllable and Gradient Porous Supports for Solid Oxide Fuel Cells." ECS Meeting Abstracts MA2021-03, no. 1: 17-17.
Sulata Sahu; Dhruba Panthi; Hai Feng; Yanhai Du. Effect of Microstructure of the Anode Support Tubes Towards SOFC Performance. ECS Meeting Abstracts 2021, MA2021-03, 208 -208.
AMA StyleSulata Sahu, Dhruba Panthi, Hai Feng, Yanhai Du. Effect of Microstructure of the Anode Support Tubes Towards SOFC Performance. ECS Meeting Abstracts. 2021; MA2021-03 (1):208-208.
Chicago/Turabian StyleSulata Sahu; Dhruba Panthi; Hai Feng; Yanhai Du. 2021. "Effect of Microstructure of the Anode Support Tubes Towards SOFC Performance." ECS Meeting Abstracts MA2021-03, no. 1: 208-208.
Yanhai Du; Dhruba Panthi; Hai Feng. Jet Fuel Desulfurization for Portable Solid Oxide Fuel Cell Applications. ECS Meeting Abstracts 2021, MA2021-03, 29 -29.
AMA StyleYanhai Du, Dhruba Panthi, Hai Feng. Jet Fuel Desulfurization for Portable Solid Oxide Fuel Cell Applications. ECS Meeting Abstracts. 2021; MA2021-03 (1):29-29.
Chicago/Turabian StyleYanhai Du; Dhruba Panthi; Hai Feng. 2021. "Jet Fuel Desulfurization for Portable Solid Oxide Fuel Cell Applications." ECS Meeting Abstracts MA2021-03, no. 1: 29-29.
Hai Feng; Dhruba Panthi; Yanhai Du. Improving Current Collection of Tubular Solid Oxide Fuel Cells. ECS Meeting Abstracts 2021, MA2021-03, 18 -18.
AMA StyleHai Feng, Dhruba Panthi, Yanhai Du. Improving Current Collection of Tubular Solid Oxide Fuel Cells. ECS Meeting Abstracts. 2021; MA2021-03 (1):18-18.
Chicago/Turabian StyleHai Feng; Dhruba Panthi; Yanhai Du. 2021. "Improving Current Collection of Tubular Solid Oxide Fuel Cells." ECS Meeting Abstracts MA2021-03, no. 1: 18-18.
Nader Hedayat; Yanhai Du. Micro-Tubular Solid Oxide Fuel Cells with One Closed-End Fabricated Via Dip-Coating and Co-Firing. ECS Meeting Abstracts 2021, MA2021-03, 21 -21.
AMA StyleNader Hedayat, Yanhai Du. Micro-Tubular Solid Oxide Fuel Cells with One Closed-End Fabricated Via Dip-Coating and Co-Firing. ECS Meeting Abstracts. 2021; MA2021-03 (1):21-21.
Chicago/Turabian StyleNader Hedayat; Yanhai Du. 2021. "Micro-Tubular Solid Oxide Fuel Cells with One Closed-End Fabricated Via Dip-Coating and Co-Firing." ECS Meeting Abstracts MA2021-03, no. 1: 21-21.
A controllable and gradient porous ceramic structure is desirable for many applications including solid oxide fuel cells (SOFC), ceramic filters or gaseous component separation. There are numerous ways to fabricate porous ceramic structures, including the use of pore formers, particle size control or freeze casting. The process we used was string-coating. Strings with various materials' coating and coatings on various strings could be a controllable element for assembling a planar or tubular ceramic microstructure. In this research, ceramic microtubes were made using removable templates covered by layers of ceramic materials using sol-gel technology. A low-cost device was designed and built for coating multiple layers of slurry onto templates efficiently. Tested templates included silk (single and triple strands), cotton thread, and angel hair pasta coated with 1, 5, 10, 15, 20, or 25 layers of slurry and then fired with a 5-stage heating cycle up to 1,100°C/1,450°C over a period of 20 hours. Samples were analyzed using a scanning electron microscope (SEM). Average diameters were calculated by measuring 30 diameters from different locations of each tube. The 20× and 25× coatings on the single silk strand, sintered at 1,450°C, resulted in the strongest and most density-uniform microtubes by decreasing the porosity. The single silk strand with 20× coating under 1,450°C firing formed a 25µm diameter hole and an average outer diameter (OD) of 39.90 µm with a standard deviation of 0.97 µm, while the 20× coating under 1,100°C resulted in an average 67.46 µm OD with a standard deviation of 1.14 µm. The 25× coating resulted in a 49.89 µm OD with standard deviation of 0.99 µm when fired up to 1,450°C. The success of this process set a foundation for assembling the individually controllable single microtubes to form ceramic planar or tubular shapes that their microstructure is controllable in terms of composition, pores size, porosity and connectivity.
Edward Dan; Yanhai Du. Design and Fabrication of a Functionally Gradient SOFC Electrode with Controllable Porous Microstructure. ECS Meeting Abstracts 2021, MA2021-03, 274 -274.
AMA StyleEdward Dan, Yanhai Du. Design and Fabrication of a Functionally Gradient SOFC Electrode with Controllable Porous Microstructure. ECS Meeting Abstracts. 2021; MA2021-03 (1):274-274.
Chicago/Turabian StyleEdward Dan; Yanhai Du. 2021. "Design and Fabrication of a Functionally Gradient SOFC Electrode with Controllable Porous Microstructure." ECS Meeting Abstracts MA2021-03, no. 1: 274-274.
Sulata Sahu; Dhruba Panthi; Hai Feng; Yanhai Du. Effect of Microstructure of the Anode Support Tubes Towards SOFC Performance. ECS Transactions 2021, 103, 407 -418.
AMA StyleSulata Sahu, Dhruba Panthi, Hai Feng, Yanhai Du. Effect of Microstructure of the Anode Support Tubes Towards SOFC Performance. ECS Transactions. 2021; 103 (1):407-418.
Chicago/Turabian StyleSulata Sahu; Dhruba Panthi; Hai Feng; Yanhai Du. 2021. "Effect of Microstructure of the Anode Support Tubes Towards SOFC Performance." ECS Transactions 103, no. 1: 407-418.
Yanhai Du; Dhruba Panthi; Hai Feng. Jet Fuel Desulfurization for Portable Solid Oxide Fuel Cell Applications. ECS Transactions 2021, 103, 179 -184.
AMA StyleYanhai Du, Dhruba Panthi, Hai Feng. Jet Fuel Desulfurization for Portable Solid Oxide Fuel Cell Applications. ECS Transactions. 2021; 103 (1):179-184.
Chicago/Turabian StyleYanhai Du; Dhruba Panthi; Hai Feng. 2021. "Jet Fuel Desulfurization for Portable Solid Oxide Fuel Cell Applications." ECS Transactions 103, no. 1: 179-184.
Edward Dan; Yanhai Du. Design and Fabrication of a Functionally Gradient SOFC Electrode with Controllable Porous Microstructure. ECS Transactions 2021, 103, 2125 -2135.
AMA StyleEdward Dan, Yanhai Du. Design and Fabrication of a Functionally Gradient SOFC Electrode with Controllable Porous Microstructure. ECS Transactions. 2021; 103 (1):2125-2135.
Chicago/Turabian StyleEdward Dan; Yanhai Du. 2021. "Design and Fabrication of a Functionally Gradient SOFC Electrode with Controllable Porous Microstructure." ECS Transactions 103, no. 1: 2125-2135.
Hai Feng; Dhruba Panthi; Yanhai Du. Improving Current Collection of Tubular Solid Oxide Fuel Cells. ECS Transactions 2021, 103, 83 -92.
AMA StyleHai Feng, Dhruba Panthi, Yanhai Du. Improving Current Collection of Tubular Solid Oxide Fuel Cells. ECS Transactions. 2021; 103 (1):83-92.
Chicago/Turabian StyleHai Feng; Dhruba Panthi; Yanhai Du. 2021. "Improving Current Collection of Tubular Solid Oxide Fuel Cells." ECS Transactions 103, no. 1: 83-92.
Nader Hedayat; Yanhai Du. Micro-Tubular Solid Oxide Fuel Cells with One Closed-End Fabricated Via Dip-Coating and Co-Firing. ECS Transactions 2021, 103, 113 -121.
AMA StyleNader Hedayat, Yanhai Du. Micro-Tubular Solid Oxide Fuel Cells with One Closed-End Fabricated Via Dip-Coating and Co-Firing. ECS Transactions. 2021; 103 (1):113-121.
Chicago/Turabian StyleNader Hedayat; Yanhai Du. 2021. "Micro-Tubular Solid Oxide Fuel Cells with One Closed-End Fabricated Via Dip-Coating and Co-Firing." ECS Transactions 103, no. 1: 113-121.
Jean-Francois Drillet; Yanhai Du; Stanislav Kolisnychenko. Fuel Cells. Fuel Cells 2020, 1 .
AMA StyleJean-Francois Drillet, Yanhai Du, Stanislav Kolisnychenko. Fuel Cells. Fuel Cells. 2020; ():1.
Chicago/Turabian StyleJean-Francois Drillet; Yanhai Du; Stanislav Kolisnychenko. 2020. "Fuel Cells." Fuel Cells , no. : 1.
Precise porosity control is highly desirable for improving the electrochemical performance of solid oxide fuel cells (SOFCs). Freeze casting is an established method for enabling high bulk porosity in structures and controlling pore orientation. In this study, freeze casting was used to fabricate tubular, anode-supported SOFCs with aligned and varying amounts of porosity by controlling the solids/water ratio in different casting slurries. SOFCs were prepared with a Ni/yttria and scandia stabilized zirconia (ScYSZ) anode support (AS), an anode functional layer (AFL), a ScYSZ electrolyte, a lanthanum strontium manganite (LSM)/ScYSZ cathode interlayer (CIL), and an LSM cathode. The permeability of the anode support was found to increase from 1.4 × 10−2 to 1.8 × 10−2 m2 as porosity was increased from 57 to 64 vol%, while the total cell resistance decreased by 35% from 0.93 to 0.60 Ohm cm2. When evaluated with 30 vol% H2 as the fuel at 800 °C, the decrease of concentration polarization enabled an increase in electrochemical performance by 42% from 0.35 to 0.50 W/cm2 as the porosity in the anode support was increased. Mechanical strength characterization using a three-point method showed there is a practical upper limit of the amount of porosity that can be designed into the anode support. This work paves a way for controlling porosity by freeze casting and understanding the correlation between porosity and concentration polarization losses in SOFCs.
Benjamin Emley; Dhruba Panthi; Yanhai Du; Yan Yao. Controlling Porosity of Anode Support in Tubular Solid Oxide Fuel Cells by Freeze Casting. Journal of Electrochemical Energy Conversion and Storage 2020, 17, 1 -31.
AMA StyleBenjamin Emley, Dhruba Panthi, Yanhai Du, Yan Yao. Controlling Porosity of Anode Support in Tubular Solid Oxide Fuel Cells by Freeze Casting. Journal of Electrochemical Energy Conversion and Storage. 2020; 17 (4):1-31.
Chicago/Turabian StyleBenjamin Emley; Dhruba Panthi; Yanhai Du; Yan Yao. 2020. "Controlling Porosity of Anode Support in Tubular Solid Oxide Fuel Cells by Freeze Casting." Journal of Electrochemical Energy Conversion and Storage 17, no. 4: 1-31.
Freeze casting is an established method for fabricating porous ceramic structures with controlled porosity and pore geometries. Herein, we developed a novel freeze casting and freeze drying process to fabricate tubular anode supports for solid oxide fuel cells (SOFCs). Freeze casting was performed by injecting aqueous anode slurry to a dual‐purpose freeze casting and freeze drying mold wrapped with peripheral coils for flowing a coolant. With the use of an ice barrier layer, proper control of the experimental setup, and adjustments in the drying temperature profile, complete drying of the individual anode tubes was achieved in four hours. The freeze‐cast anode tubes contained radially aligned columnar pore channels, thus significantly enhancing the gaseous diffusion. SOFC single cells with conventional Ni/yttria‐stabilized zirconia (YSZ)/strontium‐doped lanthanum manganite (LSM) materials were prepared by dip coating the thin functional layers onto the anode support. Single‐cell tests showed that the concentration polarization was low owing to the highly porous anode support with directional pores. With H2/N2 (1:1) fuel, maximum power densities of 0.47, 0.36, and 0.27 W/cm2 were recorded at 800, 750, and 700 °C, respectively. Our results demonstrate the feasibility of using freeze casting to obtain tubular SOFCs with desired microstructures and fast turn‐around times. This article is protected by copyright. All rights reserved.
Dhruba Panthi; Nader Hedayat; Theo Woodson; Benjamin J. Emley; Yanhai Du. Tubular solid oxide fuel cells fabricated by a novel freeze casting method. Journal of the American Ceramic Society 2019, 103, 878 -888.
AMA StyleDhruba Panthi, Nader Hedayat, Theo Woodson, Benjamin J. Emley, Yanhai Du. Tubular solid oxide fuel cells fabricated by a novel freeze casting method. Journal of the American Ceramic Society. 2019; 103 (2):878-888.
Chicago/Turabian StyleDhruba Panthi; Nader Hedayat; Theo Woodson; Benjamin J. Emley; Yanhai Du. 2019. "Tubular solid oxide fuel cells fabricated by a novel freeze casting method." Journal of the American Ceramic Society 103, no. 2: 878-888.
Tubular anode-supported solid oxide fuel cells (SOFCs) generate lower current densities than the planar SOFCs, but they have several advantages such as ease of sealing, high durability, and thermal-cycling stability. In this study, tubular anode supported SOFCs were fabricated by coupling the tape-casting and dip-coating methods. An anode support tape-cast was rolled into tubular shape over a mandrel. The seam joined to form a tube by solvent-assisted lamination at room temperature. The sample was pre-sintered at 900 °C, followed by dip-coating and co-sintering of the electrolyte at 1400 °C. The cathode layers were dip-coated onto the electrolyte and sintered at 1150 °C. The electrochemical performance of the prepared tubular SOFC was evaluated in N2/H2 gas at 650–800 °C. The cell exhibited a maximum power density of 281 mW cm-2 at 800 °C. The results confirmed that using simple low-cost methods including tape-casting, solvent-assisted lamination and dip-coating has the potential for the mass production of tubular SOFCs.
Nader Hedayat; Yanhai Du. Tubular Solid Oxide Fuel Cells Fabricated by Tape-Casting and Dip-Coating Methods. ECS Transactions 2019, 91, 329 -337.
AMA StyleNader Hedayat, Yanhai Du. Tubular Solid Oxide Fuel Cells Fabricated by Tape-Casting and Dip-Coating Methods. ECS Transactions. 2019; 91 (1):329-337.
Chicago/Turabian StyleNader Hedayat; Yanhai Du. 2019. "Tubular Solid Oxide Fuel Cells Fabricated by Tape-Casting and Dip-Coating Methods." ECS Transactions 91, no. 1: 329-337.
Fuel cells are appealing energy generation gadgets due to their high performance, advanced electricity density, low emissions and quiet operation. Among exceptional types of fuel cells, solid oxide fuel cells (SOFC) provide greater flexibility due to the fact that they can run on a diffusion of fuels and are tolerant to impurities within the realistic fuels. Additive manufacturing (AM) strategies allow the fabrication of complicated parts with the desired composition, microstructure and properties directly from the computer-aided design (CAD) models. Additive production era to SOFC will allow extra complex and advanced cell and stack designs to be manufactural, regardless of steel-supported or ceramic-supported structure. Fabrication of whole monolithic fuel cell stacks in fewer or even a single step without successive assembly require a brilliant approach. This paper attempts to review the latest applications of additive manufacturing tactics in SOFC development and production, binder jetting, spraying, extrusion, lithography-primarily based, and laser sintering.
Yanhai Du; Olawale Fatoba. Additive Manufacturing of Advanced Solid Oxide Fuel Cells – a Review. ECS Transactions 2019, 91, 277 -283.
AMA StyleYanhai Du, Olawale Fatoba. Additive Manufacturing of Advanced Solid Oxide Fuel Cells – a Review. ECS Transactions. 2019; 91 (1):277-283.
Chicago/Turabian StyleYanhai Du; Olawale Fatoba. 2019. "Additive Manufacturing of Advanced Solid Oxide Fuel Cells – a Review." ECS Transactions 91, no. 1: 277-283.
Our world largely runs on fossil fuels with 60-80% of our electricity from burning coal and natural gas. The 2015 Paris Accords intensified greenhouse gas emissions reductions. Solid oxide fuel cells (SOFC) have wide fuel choices and less complicated reforming subsystems. SOFC can also be potentially and effectively operated as solid oxide electrolysis cells (SOEC), coupling with renewable energy sources, for example, solar and wind, and storing renewable energy in chemical form (e.g. hydrogen). However, several leading international SOFC developers have abandoned their commercialization efforts. This paper is an attempt to address and discuss concerns both from a technological and economic standpoint. Considering the rapid population growth, expected increase in energy demand and price and greenhouse gas reductions need, SOFC could play a critical role in the transition from fossil fuel era to renewable energy era.
Yanhai Du; Praveen Cheekatamarla. SOFC’s Bumpy Road and Hopeful Future – a Case Study. ECS Transactions 2019, 91, 179 -186.
AMA StyleYanhai Du, Praveen Cheekatamarla. SOFC’s Bumpy Road and Hopeful Future – a Case Study. ECS Transactions. 2019; 91 (1):179-186.
Chicago/Turabian StyleYanhai Du; Praveen Cheekatamarla. 2019. "SOFC’s Bumpy Road and Hopeful Future – a Case Study." ECS Transactions 91, no. 1: 179-186.
Electron doping-induced structure modification of double-perovskite anode material with enhanced electrocatalytic activities for methane oxidation in solid oxide fuel cells.
Xin Yang; Jing Chen; Dhruba Panthi; Bingbing Niu; Libin Lei; Zhihao Yuan; Yanhai Du; Yongfeng Li; Fanglin Frank Chen; Tianmin He. Electron doping of Sr2FeMoO6−δ as high performance anode materials for solid oxide fuel cells. Journal of Materials Chemistry A 2018, 7, 733 -743.
AMA StyleXin Yang, Jing Chen, Dhruba Panthi, Bingbing Niu, Libin Lei, Zhihao Yuan, Yanhai Du, Yongfeng Li, Fanglin Frank Chen, Tianmin He. Electron doping of Sr2FeMoO6−δ as high performance anode materials for solid oxide fuel cells. Journal of Materials Chemistry A. 2018; 7 (2):733-743.
Chicago/Turabian StyleXin Yang; Jing Chen; Dhruba Panthi; Bingbing Niu; Libin Lei; Zhihao Yuan; Yanhai Du; Yongfeng Li; Fanglin Frank Chen; Tianmin He. 2018. "Electron doping of Sr2FeMoO6−δ as high performance anode materials for solid oxide fuel cells." Journal of Materials Chemistry A 7, no. 2: 733-743.
Yttria-stabilized zirconia (YSZ) is the most common electrolyte material for solid oxide fuel cells. Herein, we conducted a comparative study on the densification behavior of three different kinds of commercial 8 mol% YSZ powders: (i) TZ-8Y (Tosoh, Japan), (ii) MELox 8Y (MEL Chemicals, UK), and (iii) YSZ-HT (Huatsing Power, China). The comparison was made on both the self- supporting pellets and thin-film electrolytes coated onto a NiO–YSZ anode support. For the pellets, MELox 8Y showed the highest densification at lower sintering temperatures with 93% and 96% of the theoretical density at 1250 and 1300 °C, respectively. Although YSZ-HT showed a higher sintering rate than TZ-8Y, a sintering temperature of 1350 °C was required for both the powders to reach 95% of the theoretical density. For the thin-film electrolytes, on the other hand, YSZ-HT showed the highest sintering rate with a dense microstructure at a co-sintering temperature of 1250 °C. Our results indicate that besides the average particle size, other factors such as particle size distribution and post-processing play a significant role in determining the sintering rate and densification behavior of the YSZ powders. Additionally, a close match in the sintering shrinkage of the electrolyte and anode support is important for facilitating the densification of the thin-film electrolytes.
Dhruba Panthi; Nader Hedayat; Yanhai Du. Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytes. Journal of Advanced Ceramics 2018, 7, 325 -335.
AMA StyleDhruba Panthi, Nader Hedayat, Yanhai Du. Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytes. Journal of Advanced Ceramics. 2018; 7 (4):325-335.
Chicago/Turabian StyleDhruba Panthi; Nader Hedayat; Yanhai Du. 2018. "Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytes." Journal of Advanced Ceramics 7, no. 4: 325-335.
Freeze-casting, also called ice-templating, is a promising method to produce hierarchically porous ceramics with aligned and directional pores. Additionally, freeze-casting offers strict control over the pore sizes, the percentage of porosity, and morphology evolution. This method has found a wide range of applications. For instance, freeze-casting has emerged as a promising strategy to overcome the gas diffusion limitation through solid oxide fuel cell (SOFC) electrodes and to generate high power density. Firstly, the freeze-casting method, processing steps, and characteristics of the freeze-cast structures are presented. The effect of processing parameters including freezing conditions, solids loading and additives on the microstructure is reviewed. This article includes the developed processing routes and derived porous structures for fabricating both planar and tubular SOFCs through the freeze-casting method. Finally, discussions regarding applications are provided and suggestions for future investigations on the processing of freeze-cast electrodes and scaffolds for SOFCs are proposed.
Yanhai Du; Nader Hedayat; Dhruba Panthi; Hoda Ilkhani; Benjamin J. Emley; Theo Woodson. Freeze-casting for the fabrication of solid oxide fuel cells: A review. Materialia 2018, 1, 198 -210.
AMA StyleYanhai Du, Nader Hedayat, Dhruba Panthi, Hoda Ilkhani, Benjamin J. Emley, Theo Woodson. Freeze-casting for the fabrication of solid oxide fuel cells: A review. Materialia. 2018; 1 ():198-210.
Chicago/Turabian StyleYanhai Du; Nader Hedayat; Dhruba Panthi; Hoda Ilkhani; Benjamin J. Emley; Theo Woodson. 2018. "Freeze-casting for the fabrication of solid oxide fuel cells: A review." Materialia 1, no. : 198-210.