摘要
使用恒电流充放电和粉末微电极循环伏安方法研究了尖晶石LiMn2O4正极材料在不同混合溶剂的电解质溶液中的电化学性能,结合溶剂组分和电解质溶液的理化特性,探讨了影响尖晶石LiMn2O4正极材料电化学性能的溶剂因素。研究表明,电解质溶液组分在电极导电剂表面的氧化电位是决定LiMn2O4电极在其中的电化学循环性能的重要因素。在满足一定的氧化电位的前提下,LiMn2O4初始放电容量与电解质溶液的电导率大小有关。
The electrochemical properties of spinel LiMn2O4 cathode in electrolytes based on different solvent compositions have been examined experimentally by means of chronopotentiometry and cyclic voltametry techniques. Combining with the physical chemistry characteristics of the employed solvents and the prepared electrolytes, factors related to solvent composition influencing LiMn2O4 electrode performances have been discussed. The results reveal that the oxidation potential of the electrolyte on the surface of electrode conductor was the main factor deciding the cycleability of spinel LiMn2O4 cathode. The initial reversible capacity of the spinel LiMn2O4 electrode is found related to the electrolyte conductivity when the oxidation potential of the electrolyte on the electrode conductor was sufficiently high.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2003年第1期69-72,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(29973009)
河南省优秀中青年骨干教师基金资助课题(01513632)
