Bi氧化物改性石墨毡对碱性锌基液流电池耐锌枝晶的影响  

The Effect of Graphite Felt Modified with Bi-Based Oxides on the Inhibition of Zinc Dendrite for Alkaline Zn-Based Flow Battery

作　　者：熊萌 罗斗丽 孟志鑫 伊文轩 余国贤[1] 李海峰[1] XIONG Meng;LUO Douli;MENG Zhixin;YI Wenxuan;YU Guoxian;LI Haifeng(School of Optoelectronic Materials and Technology,Jianghan University,Wuhan 430056,China)

机构地区：[1]江汉大学光电材料与技术学院,湖北武汉430056

出　　处：《山东化工》2025年第6期16-19,23,共5页Shandong Chemical Industry

基　　金：湖北省大学生创新训练项目(S202311072051);江汉大学大学生科研项目(2023zd038);江汉大学校级科研项目(科技类专项)(2023KJZX02)。

摘　　要：锌枝晶问题会大大降低锌基液流电池的使用寿命,限制锌基液流电池的发展。通过水热反应在石墨毡表面负载Bi氧化物,探究其改性对锌基液流电池锌枝晶、电化学性能及储能性能的影响;同时利用SEM、XRD和XPS对改性石墨毡进行物化结构分析。结果显示,当前驱体Bi(NO_(3))_(3)浓度为0.006 mol/L,改性石墨毡(Bi@GF-6)的电化学性能最佳,其表面的电荷转移阻抗略有降低,锌酸盐的扩散行为提高,有利于降低浓差极化。同时,Bi@GF-6中Bi氧化物以Bi_(2)O_(3)的形式均匀负载于石墨毡表面,有利于诱导锌的均匀沉积,缓解锌枝晶现象。采用Bi@GF-6作为负极在80 mA/cm^(2)的电流密度进行单电池测试,单电池的稳定性能提高。The zinc dendrite problem will greatly reduce the service life of zinc-based flow battery and limit the development of zinc-based flow battery.In this study,Bi-based oxides were loaded on the surface of graphite felt by hydrothermal reaction,and the effects of modification on zinc dendrites,electrochemical properties and energy storage properties of Zn-based flow battery were investigated.At the same time,the physical and chemical structure of the modified graphite felt was analyzed by SEM,XRD and XPS.The results show that Bi-based compounds are uniformly loaded on the surface of graphite felt in the form of Bi_(2)O_(3).When the concentration of the precursor Bi(NO_(3))_(3) is 0.006 mol/L,the charge transfer resistance of the graphite felts modified with Bi-based oxides(Bi@GF-6)is slightly reduced,and the diffusion performance of the Zn(OH)42-is improved,which is beneficial to reduce the concentration polarization and alleviate the zinc dendrite phenomenon.The Bi@GF-6 was used as the negative electrode for single cell test at a current density of 80 mA/cm^(2),and the stability of the single cell was improved.

关 键 词：碱性锌铁液流电池 石墨毡 Bi_(2)O_(3) 锌枝晶 

分 类 号：TQ15[化学工程—电化学工业]