摘要
尖晶石型LiMn2 O4正极材料因资源丰富、无毒、安全及制备简单、技术较成熟等优点而成为最具竞争力的新一代商用锂离子二次电池的正极材料之一。由于LiMn2 O4的循环稳定性、高温(>5. 5℃)稳定性和大电流放电等因素限制了推广应用。本文从材料的结构组成对锂离子嵌脱过程的作用机理,论述了元素掺杂对尖晶石型LiMn2 O4正极材料电化学特性的影响,指出了元素掺杂本体改性锰酸锂正极材料的方法和特点。
Due to its innoxiousness, safety, low cost, high environmental acceptability and the abundance of raw material, the spinel LiMn_2O_4 will become one of the competitive cathode material of lithium-ion secondary batteries. However, the application of spinel LiMn_2O_4 has been restricted because of the unstability at high temperature (>55℃), high recharge and discharge. In this paper, the effects of doping on the electrochemistry characteristic of spinel LiMn_2O_4 were summarized from the aspect of the mechanism that the composition of cathode material affects the in-out process of lithium-ions. The methods and principles of doping to modify LiMn_2O_4 cathode material were also pointed out.
出处
《化学通报》
CAS
CSCD
北大核心
2005年第5期321-328,共8页
Chemistry
基金
国家自然科学基金 (2 0 2 730 4 7)
教育部博士点基金 (2 0 0 2 0 0 5 6 0 4 5 )资助项目
