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Li Zhang
School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China

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Journal article
Published: 01 March 2021 in Sustainable Materials and Technologies
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Porous biomass-derived carbonaceous materials with low cost and sustainable sources were considered as attractive electrode materials for energy storage devices. However, how to achieve the effective activation for the built-up of hierarchical porous structure still remains challenging. Herein, a facile and effective activation strategy combining hydrothermal pre-treatment using acid/hydrogen peroxide as dual-functional modifier and KOH activation is proposed to prepare the interconnected macroporous carbon framework with high microporosity and small dimensional mesopores from Typha grass fluff (TGF). Acetic acid was used to exfoliate nanosheets from bulk of TGF and hydrogen peroxide introduced mesopores to the carbon skeleton. The as-prepared sample achieved a high capacitance value of 440 F/g at a current density of 0.2 A/g and long cycling life with capacity retention of 93.58% after 10,000 cycles, along with the high energy density of 36.67 Wh/Kg delivered at the power density of 300 W/Kg. The surface capacitive contribution of AA/HP-TGC-PH-600 is 61.14% at the scan rate of 2 mV/s and increase to 85.39% at the scan rate of 80 mV/s. A Bode frequency of 0.277 Hz at the angle of −45° was obtained, leading to a high response time of 3.61 s. This work proposed some new insights into the pore structure engineering of biomass derived carbon and an effective approach for the improvement of their energy conversion/storage performances.

ACS Style

Chengshuai Chang; Miao Li; Ping Niu; Li Zhang; Shulan Wang. A facile dual-functional hydrothermal-assisted synthesis strategy of hierarchical porous carbon for enhanced supercapacitor performance. Sustainable Materials and Technologies 2021, 28, e00265 .

AMA Style

Chengshuai Chang, Miao Li, Ping Niu, Li Zhang, Shulan Wang. A facile dual-functional hydrothermal-assisted synthesis strategy of hierarchical porous carbon for enhanced supercapacitor performance. Sustainable Materials and Technologies. 2021; 28 ():e00265.

Chicago/Turabian Style

Chengshuai Chang; Miao Li; Ping Niu; Li Zhang; Shulan Wang. 2021. "A facile dual-functional hydrothermal-assisted synthesis strategy of hierarchical porous carbon for enhanced supercapacitor performance." Sustainable Materials and Technologies 28, no. : e00265.

Journal article
Published: 27 July 2019 in Minerals
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A direct reduction-magnetic separation-alkali leaching-dilute acid washing method was proposed to prepare high-quality acid-soluble titanium slag (HQASTS) from titanium middling ore. The relevant potential pH diagrams were built, and the analysis results showed that the pH values for alkali leaching and dilute acid washing should be higher than 13.50 and lower than 1.00, respectively. Increasing temperature was beneficial to alkali leaching but not to dilute acid washing. The effects of operating parameters on the TiO2 content and impurity oxides extraction ratios of titanium slag were investigated, and the optimal experimental conditions were obtained. The HQASTS was obtained with TiO2 and Fe2O3 content of 75.37 wt % and 0.96 wt %, respectively, under the above conditions. Furthermore, the leaching mechanism was studied by chemical analysis and X-ray diffraction (XRD) technology, and it was found that the alkali leaching-dilute acid washing process presented in this work could avoid the encapsulation of the unreacted anorthite by the calcium aluminum spinel generated in alkali leaching.

ACS Style

Jiqing Han; Jing Zhang; Wei Feng; Xiao Chen; Li Zhang; Ganfeng Tu. A Clean Process to Prepare High-Quality Acid-Soluble Titanium Slag from Titanium Middling Ore. Minerals 2019, 9, 460 .

AMA Style

Jiqing Han, Jing Zhang, Wei Feng, Xiao Chen, Li Zhang, Ganfeng Tu. A Clean Process to Prepare High-Quality Acid-Soluble Titanium Slag from Titanium Middling Ore. Minerals. 2019; 9 (8):460.

Chicago/Turabian Style

Jiqing Han; Jing Zhang; Wei Feng; Xiao Chen; Li Zhang; Ganfeng Tu. 2019. "A Clean Process to Prepare High-Quality Acid-Soluble Titanium Slag from Titanium Middling Ore." Minerals 9, no. 8: 460.

Journal article
Published: 06 May 2016 in Metals
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The oxidation kinetics of low valence titanium and iron in Ti-bearing blast furnace slag were investigated, the activation energies were calculated, which are 461.1 and 437.3 kJ/mol, respectively. The results illustrate that the oxidation process of Ti3+ in the slag is controlled by chemical reactions. However, the chemical reaction between oxygen and iron, between slag and gas, is the determining step of the iron oxidation process. The effects of the isothermal oxidation on the content of Fe2O3, FeM, FeO, and FeT in the slag are discussed. The Fe2+ and Ti3+ in the molten slag were oxidized at high temperatures. Oxygen affinity of the slag can be described using oxygen capacity. The oxygen capacity of Ti-bearing blast furnace slag was investigated during the dynamic oxidation process, the results indicates that the oxygen capacity of the slag decreased with increasing oxidation time during the dynamic oxidation process.

ACS Style

Li Zhang; Wu Zhang; Juhua Zhang; Guangqiang Li. Oxidation Kinetics and Oxygen Capacity of Ti-Bearing Blast Furnace Slag under Dynamic Oxidation Conditions. Metals 2016, 6, 105 .

AMA Style

Li Zhang, Wu Zhang, Juhua Zhang, Guangqiang Li. Oxidation Kinetics and Oxygen Capacity of Ti-Bearing Blast Furnace Slag under Dynamic Oxidation Conditions. Metals. 2016; 6 (5):105.

Chicago/Turabian Style

Li Zhang; Wu Zhang; Juhua Zhang; Guangqiang Li. 2016. "Oxidation Kinetics and Oxygen Capacity of Ti-Bearing Blast Furnace Slag under Dynamic Oxidation Conditions." Metals 6, no. 5: 105.