锂离子电池正极材料Li_xNi_(1/3)Mn_(1/3)Co_(1/3)O_2的合成及电化学性能研究  

Studies on Synthesis and Electrochemical Performance of Li_(x)Ni_(1/3)Mn_(1/3)Co_(1/3)O_(2) as Cathode Material for Lithium Ion Batteries

作　　者：郭晓健[1] 李劼[1] 李益孝[1] 杨勇[1] 

机构地区：[1]厦门大学固体表面物理化学国家重点实验室,福建厦门361005

出　　处：《电化学》2006年第3期310-314,共5页Journal of Electrochemistry

基　　金：国家杰出青年科学基金(29925310);国家"973"项目资助

摘　　要：应用以氢氧化物共沉淀为前驱体的高温固相烧结法合成LiNi1/3Mn1/3Co1/3O2正极材料，研究了沉淀温度及烧结过程锂盐投入量对该材料的结构和电化学性能的影响．结果表明，以室温（-20℃）下合成的氢氧化物为前驱体制备的LiNi1/3Mn1/3Co1/3O2具有较好的电化学性能．高温固相烧结会导致部分LiOH损失，因而在合成过程中需加入过量的氢氧化锂，实验表明Li1.08Ni1/3Mn1/3Co1/3O2材料的电化学性能最优．A series of LiNi1/3Mn1/3 CO1/3O2 were synthesized by a combined hydroxides coprecipitation and calcination method. Effects of synthesizing temperature of coprecipitations and the Li： M ratios on structure and electrochemical performance of the materials were studied. The results showed that materials synthesized with co- precipitation at room temperature （-20℃） delivered the best electrochemical performance. Another series of cathode materials Li.Ni1/3Mn1/3 CO1/3O2 with different Li： M ratios were synthesized with this method. The results showed that sintering at high temperature could cause loss of LiOH, thus more LiOH should be added. It is demonstrated that Li1.08Ni1/3Mn1/3Co1/3O2 had the best electrochemical performance.

关 键 词：锂离子电池 LiNi1/3Mn1/3Co1/3O2 比容量 

分 类 号：TM912[电气工程—电力电子与电力传动] O614.111[理学—无机化学]