储能科学与技术2024，Vol.13Issue(2)：381-389,9.DOI:10.19799/j.cnki.2095-4239.2023.0607
金属有机框架衍生的C-Bi/CC电极制备及其在铁铬液流电池中的电化学性能
Fabrication of metal-organic framework-derived C-Bi/CC electrode materials and their electrochemical properties in ICRFB
摘要
Abstract
The electrode is an important part of the iron-chromium flow battery,serving as the site where the active components in the electrolyte undergo electrochemical reactions.The ideal electrode material should have high conductivity,large specific surface area,high electrochemical activity,low cost,among other characteristics.However,current electrode materials often lack a balance of these characteristics.Metal-organic frameworks(MOFs)combine their advantages of high conductivity and high catalytic performance,providing additional active sites for electrochemical reactions and finding widespread use in electrode materials.Herein,bismuth-based carbon cloth(CC)electrodes(C-Bi/CC)with carbon cloth-supported Bi-MOF as a precursor(Bi-MOF/CC)were prepared using a hydrothermal method.The electrode performance was improved by exploring the coupling correlation between the addition of metal salts and the electrode performance.The results showed that the electrode sample using 90 mg of metal salt and the ordinary carbon cloth as the positive electrode exhibited the best electrochemical performance,with a reduced polarization resistance of 1.069 Ω(an 8.5%reduction),an enhanced electrochemical active area,a low Cr3+ reduction overpotential of 0.25 V(a 59.7%decrease).The modified electrode was used as the negative electrode of the iron-chromium flow battery for the battery cycling performance test.At a current density of 80 mA/cm2,the energy efficiency reached 89.7%,the Coulombic efficiency was 97.2%,and the voltage efficiency was 92.3%.At a current density of 140 mA/cm2,the energy efficiency remained high at 83.8%,with the Coulomb efficiency reaching 98.1%and the voltage efficiency reaching 85.5%.关键词
铁铬液流电池/电极材料/电化学性能/能量效率Key words
iron-chromium flow batteries/electrode material/electrochemical performance/energy efficiency分类
化学化工引用本文复制引用
周洋,韩培玉,牛迎春,徐春明,徐泉..金属有机框架衍生的C-Bi/CC电极制备及其在铁铬液流电池中的电化学性能[J].储能科学与技术,2024,13(2):381-389,9.基金项目
国家自然科学基金青年项目(22308380,22308378). （22308380,22308378）
