引用本文:
王雅丹, 王剑, 牟其勇, 李永伟, 其鲁. 水性粘结剂制备LiMn2O4电极的电化学性能[J]. 物理化学学报,
2007, 23(0): 14-17.
doi:
10.3866/PKU.WHXB2007Supp04
Citation: WANG Ya-Dan, WANG Jian, MU Qi-Yong, LI Yong-Wei, QI Lu. Electrochemical Performances of LiMn2O4-based Electrode with Water-soluble Binder[J]. Acta Physico-Chimica Sinica, 2007, 23(0): 14-17. doi: 10.3866/PKU.WHXB2007Supp04
Citation: WANG Ya-Dan, WANG Jian, MU Qi-Yong, LI Yong-Wei, QI Lu. Electrochemical Performances of LiMn2O4-based Electrode with Water-soluble Binder[J]. Acta Physico-Chimica Sinica, 2007, 23(0): 14-17. doi: 10.3866/PKU.WHXB2007Supp04
水性粘结剂制备LiMn2O4电极的电化学性能
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.
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关键词:
- 水性正极; 锰酸锂; 锂离子电池
English
Electrochemical Performances of LiMn2O4-based Electrode with Water-soluble Binder
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 od safety performances during overcharging.
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