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One-step activation of high-graphitization N-doped porous biomass carbon as advanced catalyst for vanadium redox flow battery.
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2020-03-25 , DOI: 10.1016/j.jcis.2020.03.069 Dixuan Cheng 1 , Mengran Tian 1 , Boyun Wang 1 , Jinliang Zhang 1 , Jiafu Chen 2 , Xiaojian Feng 1 , Zhangxing He 3 , Lei Dai 3 , Ling Wang 3
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2020-03-25 , DOI: 10.1016/j.jcis.2020.03.069 Dixuan Cheng 1 , Mengran Tian 1 , Boyun Wang 1 , Jinliang Zhang 1 , Jiafu Chen 2 , Xiaojian Feng 1 , Zhangxing He 3 , Lei Dai 3 , Ling Wang 3
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In this paper, we reported a one-step activation strategy to prepare highly graphitized N-doped porous carbon materials (KDC-FAC) derived from biomass, and adopted ferric ammonium citrate (FAC) as active agent. At high temperature, FAC was decomposed into Fe- and NH3-based materials, further increasing graphitization degree, introducing N-containing functional groups and forming porous structure. KDC-FAC has superior electrocatalytic activity and stability towards V2+/V3+ and VO2+/VO2+ redox reactions. High graphitization degree can enhance the conductivity of carbon material, and porous structure is conducive to increase reaction area of vanadium redox couples. Moreover, N-containing functional groups are beneficial to improve the electrode wettability and serve as active sites. The single cell tests demonstrate that KDC-FAC modified cell exhibits good adaptability under high current density and superb stability in cycling test. Compared with pristine cell, the energy efficiency of KDC-FAC modified cell is increased by 9% at 150 mA cm-2. This biomass-derived carbon-based material proposed in our work is expected to be an excellent catalyst for vanadium redox flow battery.
中文翻译：
一步活化高石墨化氮掺杂多孔生物质碳作为钒还原液流电池的高级催化剂。
在本文中，我们报告了一种一步活化策略，以制备源自生物质的高度石墨化的N掺杂多孔碳材料（KDC-FAC），并采用柠檬酸铁铵（FAC）作为活性剂。在高温下，FAC分解成Fe和NH3基材料，进一步提高了石墨化程度，引入了含N的官能团并形成了多孔结构。KDC-FAC对V2 + / V3 +和VO2 + / VO2 +氧化还原反应具有出色的电催化活性和稳定性。高石墨化度可以提高碳材料的电导率，并且多孔结构有利于增加钒氧化还原对的反应面积。此外，含N的官能团有利于改善电极的润湿性并用作活性部位。单电池测试表明，KDC-FAC修饰的电池在高电流密度下表现出良好的适应性，并且在循环测试中表现出出色的稳定性。与原始电池相比，KDC-FAC修饰的电池在150 mA cm-2的能量效率提高了9％。我们的工作中提出的这种源自生物质的碳基材料有望成为钒氧化还原液流电池的出色催化剂。
更新日期：2020-03-26
中文翻译：
一步活化高石墨化氮掺杂多孔生物质碳作为钒还原液流电池的高级催化剂。
在本文中，我们报告了一种一步活化策略，以制备源自生物质的高度石墨化的N掺杂多孔碳材料（KDC-FAC），并采用柠檬酸铁铵（FAC）作为活性剂。在高温下，FAC分解成Fe和NH3基材料，进一步提高了石墨化程度，引入了含N的官能团并形成了多孔结构。KDC-FAC对V2 + / V3 +和VO2 + / VO2 +氧化还原反应具有出色的电催化活性和稳定性。高石墨化度可以提高碳材料的电导率，并且多孔结构有利于增加钒氧化还原对的反应面积。此外，含N的官能团有利于改善电极的润湿性并用作活性部位。单电池测试表明，KDC-FAC修饰的电池在高电流密度下表现出良好的适应性，并且在循环测试中表现出出色的稳定性。与原始电池相比，KDC-FAC修饰的电池在150 mA cm-2的能量效率提高了9％。我们的工作中提出的这种源自生物质的碳基材料有望成为钒氧化还原液流电池的出色催化剂。
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