期刊论文

Hu, Y.-J.(hyjwsg@163.com)

中文

中南大学学报(自然科学版)

1672-7207

2007

38

2

256-261

10.3969/j.issn.1672-7207.2007.02.014

2003AA32X010:国家高技术研究发展计划（863计划）

本校为其他机构

以N,N-二甲基甲酰胺为溶剂,聚偏氟乙烯-六氟丙烯为聚合物基质,采用直接挥发溶剂法制备正极自支撑的聚合物电解质,并以锂为负极制备LiCoO2聚合物电池.用扫描电子显微镜和循环伏安实验对聚合物电解质进行表征,用红外光谱分析了电解质微孔的形成机理,并对聚合物电池的充放电性能和界面阻抗进行测试.结果表明:直接挥发溶剂制得的聚合物电解质孔穴丰富,电化学稳定窗口达5.5 V采用正极自支撑电解质可改善材料的力学性能,降低电池的界面阻抗;制备的聚合物电池界面性质稳定,循环40次后容量保持率为97.5%,0.5C和1C倍率放电分别能保持0.1C放电容量的97.8%和95.7%.

A poly (vinylidene) fluoride-hexafluoropropylene electrolyte supported by the cathode electrode was prepared by evaporating the solvent of dimethyl formamide, and polymer lithium-ion batteries were assembled by using lithium foil as anode and LiCoO2 as cathode material. Polymer membrane was characterized by scanning electron microscopy and cyclic voltammetry test, the formation mechanism of micropore was discussed by infrared spectroscopy, and the polymer battery's electrochemical properties and resistance were tested by charge-discharge experiment and A.C. impedance. The results show that thi...