共沉淀法合成正极材料LiMnPO_4/C  

Synthesizing cathode material LiMnPO_4/C via co-precipitation method

作　　者：尚伟丽 黄永侃 陈玲震 赖玉丽 

机构地区：[1]深圳市德方纳米科技有限公司,广东深圳518052

出　　处：《电池》2013年第4期227-228,共2页Battery Bimonthly

摘　　要：以羧甲基纤维素（CMC）为碳源，用共沉淀法制备碳包覆磷酸锰锂（LiMnPO。／C）。用XRD、SEM及恒流充放电等方法对样品进行了研究。样品具有橄榄石晶体结构，物相较纯，粒径细小且分布均匀，一次颗粒直径约为200nm。以0．05C倍率在2．0—4．5V循环，首次放电比容量为130mAh／g，库仑效率为80％，循环20次的容量保持率为95％。Carbon-coated lithium manganese phosphate （ LiMnP04/C ） was synthesized via co-precipitation method with carboxyl methyl cellulose（CMC） as carbon source. XRD,SEM and galvanostatic charge-discharge analyses were used to study the samples. The sample had pure olivine structures, with particle size of about 200 nm. The initial specific discharge capacity of LiMnP04/C at 0. 05 C was 130 mAh/g,the Columbic efficiency was 80% ,the capacity retention at the 20th cycle was 95%.

关 键 词：碳包覆磷酸锰锂(LiMnPO4 C) 羧甲基纤维素(CMC) 共沉淀 

分 类 号：TM912.9[电气工程—电力电子与电力传动]