水系锌电池Se@Zn负极的制备及性能  

Preparation and Performance of Se@Zn Anode for Aqueous Zinc Battery

作　　者：范敏敏 罗成玲 薛裕华 FAN Minmin;LUO Chenging;XUE Yuhua(School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学材料与化学学院,上海200093

出　　处：《广州化学》2023年第6期36-39,I0002,共5页Guangzhou Chemistry

基　　金：国家自然科学基金项目(52172095)。

摘　　要：采用原位化学反应策略,在Zn电极表面生长出Se单质,通过XRD、XPS、SEM和能谱表征,结果表明Se在Zn电极表面的成功合成,且Se在锌电极表面均匀分布。将Se@Zn电极和裸Zn电极分别组装为对称电池和以MnO2为正极的全电池进行性能比较,结果表明,Se@Zn对称电池在1 mA/cm^(2)下可以运行1000小时以上,并保持27mV的极化电压。Se@Zn||MnO_(2)全电池在2A/g电流密度下容量为136mA·h/g,在1000次循环后,Se@Zn||MnO_(2)全电池仍接有近100%的库仑效率,容量保持率为88%。Using an in-situ chemical reaction strategy,a layer of Se simple substance was grown on the surface of the Zn electrode.The successful synthesis of the Se simple substance layer on the surface of the Zn electrode was confirmed by XRD and XPS characterization methods,and the Se and uniform distribution of Zn element.The Se@Zn electrode and the bare Zn electrode was assembled into a symmetric cell and a full cell with MnO2 as the positive electrode for performance comparison.The results show that the Se@Zn symmetric cell achieves a stability of 1000 h at 1 mA/cm^(2) and maintains a polarization voltage of 27 mV.The capacity of the Se@Zn||MnO_(2) full battery is 136 mA h/g at a current density of 2 A/g,and after 1000 cycles,the Se@Zn||MnO_(2) full battery still maintains a high capacity of nearly 100%coulombic efficiency and 88%capacity retention。

关 键 词：水系锌离子电池 负极材料 Se@Zn界面 容量保持率 库伦效率 

分 类 号：TQ152[化学工程—电化学工业]