机构地区: 华南师范大学化学与环境学院化学系
出 处: 《电源技术》 2005年第6期357-360,共4页
摘 要: 元素Mn在电解液中的溶出造成的容量损失是尖晶石锂锰氧化物系列材料容量衰减的主要原因之一。在电解液中的化学稳定性是评价尖晶石锂锰氧化物系列材料或锂离子蓄电池电解质性能的重要指标之一。通过测量尖晶石锂锰氧化物系列材料粉末微电极在电解液中的开路电位随贮存时间的变化,估算出其在电解液中的相对平均溶解速率来评价LiMn2O4系列材料在电解液中的化学稳定性。该方法具有测试设备简单、测试过程简便快捷、结果可靠的特点。 Mn dissolution into electrolyte is one of the major reasons for capacity fading of spinel LiMn2O4 and its derivants. Chemical stability of spinel LiMn2O4 and its derivants in electrolyte is an important standard to evaluate the spinel LiMn2O4 and its derivants or electrolytes. In this paper the relative average dissolution rate of spinel LiMn2O4 and its derivants, which can be used to evaluate chemical stability of these materials, was estimated by open circuit potential (OCP) variation curve of LiMn2O4 or its derivants powder microelectrode in electrolyte with storage time. It proves that the method is simple and convenient with credible results.
领 域: [电气工程]