新型炭材料（中英文）2024，Vol.39Issue(1)：131-141,11.DOI:10.1016/S1872-5805(24)60837-1
铋纳米颗粒负载的氮掺杂石墨毡用于稳定高效的铁铬液流电池
Bismuth nanoparticles anchored on N-doped graphite felts to give stable and efficient iron-chromium redox flow batteries
摘要
Abstract
Iron-chromium redox flow batteries(ICRFBs)use abundant and inexpensive chromium and iron as the active sub-stances in the electrolyte and have great potential as a cost-effective and large-scale energy storage system.However,they are still plagued by several issues,such as the low electrochemical activity of Cr3+/Cr2+and the occurrence of the undesired hydrogen evolu-tion reaction(HER).We report the synthesis of amorphous bismuth(Bi)nanoparticles(NPs)immobilized on N-doped graphite felts(GFs)by a combined self-polymerization and wet-chemistry reduction strategy followed by annealing,which are used as the negat-ive electrodes for ICRFBs.The resulting Bi NPs react with H+to form intermediates and greatly inhibit the parasitic HER.In addi-tion,the combined effect of Bi and N dopants on the surface of GF dramatically increases the electrochemical activity of Fe2+/Fe3+and Cr3+/Cr2+,reduces the charge transfer resistance,and increases the mass transfer rate compared to plain GF.At the optimum Bi/N ratio of 2,a high coulombic efficiency of up to 97.7％is maintained even for 25 cycles at different current densities,the energy effi-ciency reaches 85.8％at 60.0 mA cm-2,exceeding many other reported materials,and the capacity reaches 862.7 mAh L-1after 100 cycles,which is about 5.3 times that of bare GF.关键词
铁铬液流电池/Bi/负极/氮掺杂/石墨毡Key words
Iron-chromium flow battery/Bi/Negative electrode/Nitrogen doping/Graphite felt分类
化学化工引用本文复制引用
车航欣,高宇飞,杨家辉,洪崧,郝磊端,徐亮,Sana Taimoor,Alex W.Robertson,孙振宇..铋纳米颗粒负载的氮掺杂石墨毡用于稳定高效的铁铬液流电池[J].新型炭材料（中英文）,2024,39(1):131-141,11.基金项目
This work was supported by the National Key Research and Development Program of China(2022YFC2105900),National Natural Science Found-ation of China(22372007 and 21972010),and Funda-mental Research Funds for the Central Universities(JD2310,ZY2317 and buctrc202226). 本研究受国家重点研发计划(2022YFC2105900) （2022YFC2105900）
国家自然科学基金项目(22372007、21972010) （22372007、21972010）
中央高校基本科研业务费专项资金(JD2310、ZY2317、buctrc202226). （JD2310、ZY2317、buctrc202226）
