应用以氢氧化物共沉淀为前驱体的高温固相烧结法合成L iN i1/3Mn1/3Co1/3O2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L iN i1/3Mn1/3Co1/3O2具有较好的电化学性能.高温固相烧结会导致部分L iOH损失,因而在合成过程中需加入过量的氢氧化锂,实验表明L i1.08N i1/3Mn1/3Co1/3O2材料的电化学性能最优.

A series of LiNi_(1/3)Mn_(1/3)Co_(1/3)O_(2) 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 coprecipitation at room temperature(~20 ~(o)C) delivered the best electrochemical performance.Another series of cathode materials Li_(x)Ni_(1/3)Mn_(1/3)Co_(1/3)O_(2) 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 Li_(1.08)Ni_(1/3)Mn_(1/3)Co_(1/3)O_(2) had the best electrochemical performance.