物理化学学报 >> 2007, Vol. 23 >> Issue (Supp): 14-17.doi: 10.3866/PKU.WHXB2007Supp04

研究论文 上一篇    下一篇

水性粘结剂制备LiMn2O4电极的电化学性能

王雅丹; 王剑; 牟其勇; 李永伟; 其鲁   

  1. 中信国安盟固利新能源科技有限公司, 北京 102200; 北京大学化学与分子工程学院应用化学系, 新能源材料与技术实验室, 北京 100871
  • 收稿日期:1900-01-01 修回日期:1900-01-01 发布日期:2008-01-04
  • 通讯作者: 其鲁 E-mail:qilu@pku.edu.cn

Electrochemical Performances of LiMn2O4-based Electrode with Water-soluble Binder

WANG Ya-Dan; WANG Jian; MU Qi-Yong; LI Yong-Wei; QI Lu   

  1. CITIC Guoan Mengguli New Energy Technology Co. Ltd., Beijing 102200, P. R. China; New Energy Materials and Technology Laboratory, Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
  • Received:1900-01-01 Revised:1900-01-01 Published:2008-01-04
  • Contact: QI Lu E-mail:qilu@pku.edu.cn

摘要: 采用高温固相法合成了正极材料LiMn2O4, 利用X射线衍射和扫描电镜对材料的晶体结构和表面形貌进行了分析. 同时使用水溶性丙烯酸类聚合物作为粘结剂将正极材料LiMn2O4制成电极, 并通过组装成2.5 Ah圆柱铝塑膜锂离子电池来考察材料的电化学性能. 结果表明, 所制备的材料LiMn2O4为单一的尖晶石结构. 该材料与水溶性粘结剂配合使用具有良好的电化学性能, 以0.5C倍率充放电, 比容量达到95.8 mAh·g-1, 放电平均电压约为3.85 V, 并且该材料有良好的安全性能, 在过充情况下电池不起火、不爆炸.

关键词: 水性正极, 锰酸锂, 锂离子电池

Abstract: The spinel LiMn2O4 was synthesized by high temperature solid-state reaction and its structure and morphology were analyzed by XRD and SEM. A 2.5 Ah cylindrical lithium-ion battery was developed using electrodes made with water-soluble polymer binder, and its electrochemical performance was tested as well. The results showed that the synthesized LiMn2O4 material has simple spinel phase. The cell with water-binder LiMn2O4 electrode showed excellent electrochemical performance. The cathode’s specific capacity reached 95.8 mAh·g-1 at 0.5C (1C=2.5A) rate and the average discharge voltage of the cell was 3.85 V at 1C rate. The cells also have good safety performances during overcharging.

Key words: Cathode with water-binder, LiMn2O4, Li-ion battery

MSC2000: 

  • O646