摘要
采用超声辅助共沉淀法合成了锂离子电池用LiNi0.5Mn1.5O4正极材料,借用XRD、SEM及电化学性能测试对其进行表征,研究了超声辅助对LiNi0.5Mn1.5O4的微观结构、形貌及电化学性能的影响。研究结果表明,采用超声辅助能够消除LixNi1–xO杂相,获得粒径更为均匀的纯相尖晶石结构的LiNi0.5Mn1.5O4。超声辅助能够提高LiNi0.5Mn1.5O4的电化学性能,在2C倍率下放电20次循环后未超声和超声辅助样品的容量保持率分别为95.05%和97.42%。
Cathode material LiNi0.5Mn1.5O4 for lithium-ion batteries was synthesized via ultrasonic-assisted co-precipitation method. The effects of the ultrasound on the microstructure, surface morphology and electrochemical performance of LiNi0.sMnl,sO4 were studied using XRD, SEM and electrochemical property measurements. The results show that the ultrasonic-assisted is benefit to eliminate LixNi1-xO impurity, and the synthesized LiNi0.5Mn1.5O4 using ultrasound-assisted co-precipitation method with a pure spinel structure possesses better particle uniformity and higher electrochemical performance. After cycling 20 times at 2C, the capacity retention rates of LiNi0.5Mn1.5O4 synthesized by co-precipitation method and ultrasonic-assisted co-precipitation method are 95.05% and 97.42%, respectively.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2012年第4期52-55,共4页
Electronic Components And Materials
基金
河南省重点科技攻关资助项目(No.112102210282)
