高性能低镍三元正极复合材料LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)/V_(2)O_(5)的表面活性剂辅助水热法制备及其电化学性能研究  

Preparation and Electrochemical Properties of LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)/V_(2)O_(5)Ternary Cathode Composites with High Performance and Low Nickel by Surfactant-assisted Hydrothermal Method

作　　者：陈绍军[1] 翁少玲 叶素美 张燕华[1] 叶旋[1] Chen Shaojun;Weng Shaoling;Ye Sumei;Zhang Yanhua;Ye Xuan(Heyuan Polytechnic,Heyuan 517000,China)

机构地区：[1]河源职业技术学院,广东河源517000

出　　处：《广东化工》2022年第1期23-26,共4页Guangdong Chemical Industry

基　　金：河源市科技计划项目(河科社032);河源职业技术学院2020年校级科技计划项目(2020KJ-01);广东省普通高校特色创新类项目(2019GKTSCX108)。

摘　　要：采用表面活性剂辅助水热法制备出LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)/V_(2)O_(5)三元正极复合材料,探讨了该复合材料形貌、结构并研究了其电化学性能。实验结果表明,使用十二烷基苯磺酸钠(SDBS)作为表面活性剂,用1%V_(2)O_(5)对材料进行包覆,获得了均匀、紧密的复合材料颗粒。在2.5~4.6 V电压、0.5 C放电倍率条件下,首次放电量达到201.516 mAh/g,容量保持率高,具备良好的循环稳定性与倍率性能。表明所制备的LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)/V_(2)O_(5)三元正极复合材料具有良好的电化学性能。The LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)/V_(2)O_(5)ternary cathode composite material was prepared by the surfactant-assisted hydrothermal method,and the morphology and structure of the composite material were discussed and its electrochemical performance was studied.The experimental results show that using sodium dodecylbenzene sulfonate (SDBS) as a surfactant and coating the material with 1%V_(2)O_(5),uniform and compact composite particles are obtained.Under the condition of 2.5~4.6 V voltage and 0.5 C discharge rate,the first discharge capacity reaches 201.516 mAh/g,the capacity retention rate is high,and it has good cycle stability and rate performance.It shows that the prepared LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)/V_(2)O_(5)ternary cathode composite material has good electrochemical performance.

关 键 词：锂离子电池 三元锂电池 三元正极复合材料 表面活性剂 水热-高温固相合成 

分 类 号：TM912[电气工程—电力电子与电力传动]