一步固相法制备高性能Li2MnSiO4/C锂离子电池正极材料  

Enhanced Electrochemical Performance Li_2MnSiO_4/C Cathode Material Synthesized by One Step Solid State Method

作　　者：赖春艳[1] 吴婷婷[1] 张春瑶[1] 杨波[1] 李世成[1] 

机构地区：[1]上海电力学院环境与化学工程学院,上海200090

出　　处：《上海电力学院学报》2016年第4期319-321,338,共4页Journal of Shanghai University of Electric Power

基　　金：国家自然科学基金(51402187);上海市科学技术委员会课题(14DZ2261000)

摘　　要：采用一步固相法合成了Li_2MnSiO_4/C正极材料,利用XRD,EIS和循环伏安测试对该材料进行了结构和电化学性能表征.研究了一步固相法中添加不同比例的葡萄糖对Li_2MnSiO_4材料性能的影响.结果表明:葡萄糖作碳源复合可以提高Li_2MnSiO_4正极材料的充放电比容量和循环性能,同时在一步固相合成法中还能细化Li_2MnSiO_4正极材料颗粒.葡萄糖添加量为6%时,制备得到的Li_2MnSiO_4/C正极材料首次可逆放电比容量为213.1 mAh/g.Li2MnSiO4/C cathode material is synthesized through one step solid state method. XRD,EIS and cyclic voltammetry measurment are used to analyze the structure and electrochemi- cal performance of Li2MnSiO4/C cathode material. The effect of different glucose adding ratio on the electrochemical properties of LiEMnSiO4 is researched. The results show that the glucose adding improves the electrochemical performance as well as reduces the particle of Li2MnSiO4 cathode material. The LiEMnSiO4/C with 6% glucose adding shows a discharge capacity of 213.1 mAh/g at 0.05C,much higher than the pure Li2MnSiO4 cathode materials.

关 键 词：锂离子电池 Li2MnSiO4正极材料 葡萄糖 碳复合 

分 类 号：TM912[电气工程—电力电子与电力传动]