LiMn_(2)O_(4)/ZnO材料的电化学性能研究  

Study on Electrochemical Properties of LiMn_(2)O_(4)/ZnO Materials

作　　者：李哲宇 李广宇[1] LI Zhe-yu;LI Guang-yu(Shenyang Ligong University,Shenyang Liaoning 100159,China)

机构地区：[1]沈阳理工大学环境与化学工程学院,辽宁沈阳100159

出　　处：《辽宁化工》2022年第7期890-892,897,共4页Liaoning Chemical Industry

摘　　要：实验通过ZnO包覆自制的LiMn_(2)O_(4)正极材料,并通过X射线衍射、扫描电子显微镜等材料检测手段,和恒电流充放电、循环伏安和电化学阻抗谱等电化学检测技术,对合成材料的结构、形貌和电化学性能进行表征。实验结果表明:LiMn_(2)O_(4)/ZnO的初始放电能力达到102.0 mAh·g^(-1),且经过50个循环后,阻抗值略大于LiMn_(2)O_(4),但极化较小,有助于锂离子的嵌入和脱出;这说明经过ZnO包覆后的LiMn_(2)O_(4)具有较优的电化学性能。The LiMn_(2)O_(4) cathode material was prepared by coating with ZnO.The structure,morphology and electrochemical properties of the synthesized materials were characterized by X-ray diffraction,scanning electron microscopy and electrochemical detection techniques of constant current charge discharge,cyclic voltammetry and electrochemical impedance spectroscopy.The experimental results showed that the initial discharge capacity of LiMn_(2)O_(4)/ZnO reached 102.0 mAh·g^(-1),and after 50 cycles,the impedance value was slightly greater than LiMn_(2)O_(4),but polarization was small,which was conducive to the insertion and removal of lithium ions.This paper shows that LiMn_(2)O_(4) coated with ZnO has good electrochemical properties.

关 键 词：锂离子电池 正极材料 包覆 改性 

分 类 号：TQ016[化学工程]