P2-Na_(0.66)Li_(0.22)Ti_(0.78)O_2/AC复合材料的合成与电化学性能表征  

Preparation and electrochemical characterization of P2-Na_(0.66)Li_(0.22)Ti_(0.78)O_2/activated carbon composite

作　　者：吕仙月 张书明[2] 方陈[3] 贺健[2] 刘宇[2,4] 

机构地区：[1]上海电力学院,上海200082 [2]中国科学院上海硅酸盐研究所,上海200050 [3]国网上海市电力公司,上海200122 [4]上海电气钠硫储能技术有限公司,上海201815

出　　处：《电源技术》2016年第11期2206-2209,共4页Chinese Journal of Power Sources

基　　金：上海市科学技术委员会科研计划项目(14DZ1201500;16XD1424600);国家科技支撑计划课题(2013BAA01B04);国家电网公司科技项目(520940120036)

摘　　要：合成了P2-Na_(0.66)Li_(0.22)Ti_(0.78)O_2及其与活性炭(AC)的复合材料,以Li+/Li为对电极研究了合成材料的嵌脱锂电化学特征。研究表明:P2-Na_(0.66)Li_(0.22)Ti_(0.78)O_2可逆放电比容量为90.3 m Ah/g,活性炭复合后材料比容量提高了35.8%,达到122.6 m Ah/g,且倍率性能较纯P2-Na_(0.66)Li_(0.22)Ti_(0.78)O_2电极也有所提高。进一步以活性炭为正极,P2-Na_(0.66)Li_(0.22)Ti_(0.78)O_2/AC复合材料为负极组成不对称超级电容器,也表现出较好的电化学性能。P2-Na0.66Li0.22Ti0.78O2 and its composite containing the conducting activated carbon （AC） were synthesized. The electrochemical behavior of the as-proposed materials was investigated based on the Li/Li＋ electrode system. The reversible discharge capacity of P2-Na0.66Li0.22Ti0.78O2 was 90.3 mAh/g, whereas that of the P2-Na0.66Li0.22Ti0.78O2 AC composite was improved for 35.8%, at 122.6 mAh/g. The rate ability of the composite with AC was superior to that of P2-Na0.66Li0.22Ti0.78O2. The high electrochemical performance was obtained for the hybrid supercapacitor cell based on the P2-Na0.66Li0.22Ti0.78O2/AC composite as an anode and the activated carbon（AC） as cathode.

关 键 词：P2-Na0.66Li0.22Ti0.78O2 活性炭 超级电容器 

分 类 号：TM53[电气工程—电器]