文献类型：期刊文献

中文题名：AlF_(3)包覆对LiNi_(0.5)Mn_(1.5)O_(4)正极材料电化学性能影响研究

英文题名：Effect of AlFCoating on Electrochemical Properties of LiNi_(0.5)Mn_(1.5)O_(4) Cathode Materials

作者：肖兵 曹爱华 黄妞 龙雪梅 周登凤

第一作者：肖兵

机构：[1]贵州理工学院,材料与能源工程学院,贵州省轻金属材料制备技术重点实验室,贵州省流程性工业新过程工程研究中心,贵州贵阳550003

第一机构：贵州理工学院材料与能源工程学院

年份：2021

期号：8

起止页码：30-32

中文期刊名：广东化工

外文期刊名：Guangdong Chemical Industry

基金：2019年大学生创新创业训练计划项目(省级一般)(S201914440155);黔教合KY字[2017]021。

语种：中文

中文关键词：LiNi_(0.5)Mn_(1.5)O_(4);包覆;电化学性能;水热法

外文关键词：LiNi_(0.5)Mn_(1.5)O_(4);Coating;Electrochemical performance;Hydrothermal method

摘要：本文通过水热法的方式获得了LiNi_(0.5)Mn_(1.5)O_(4)正极材料,并且利用1%AlF_(3)对LiNi_(0.5)Mn_(1.5)O_(4)的表面进行包覆改性。SEM电镜测试表明,经过包覆改性手段处理后的样品与纯样相比其材料的晶体结构未发生改变,对未包覆的LiNi_(0.5)Mn_(1.5)O_(4)和1%AlF_(3)包覆后的LiNi_(0.5)Mn_(1.5)O_(4)的正极材料通过新威和电化学工作站进行了电化学性能测试,所获结果表明:发现AlF_(3)在材料表面形成的包覆层对电解液与LiNi_(0.5)Mn_(1.5)O_(4)正极材料之间的相互作用起到了抑制作用,因此经过包覆改性的LiNi_(0.5)Mn_(1.5)O_(4)正极材料的电化学性能明显提高,1%AlF_(3)包覆后LiNi_(0.5)Mn_(1.5)O_(4)的正极材料的倍率性能以及0.2C低电流密度下首次放电比容量均得到提高。
LiNi_(0.5)Mn_(1.5)O_(4) cathode material was prepared by hydrothermal method,and the surface of LiNi_(0.5)Mn_(1.5)O_(4) was modified by 1%AlF_(3).The results of SEM test showed that the crystal structure of LiNi_(0.5)Mn_(1.5)O_(4) and 1%AlF_(3) coated LiNi_(0.5)Mn_(1.5)O_(4) cathode materials did not change compared with the pure sample.The electrochemical properties of LiNi_(0.5)Mn_(1.5)O_(4) cathode materials were tested.The results show that the AlF_(3) coating effectively inhibits the interaction between the electrolyte and LiNi_(0.5)Mn_(1.5)O_(4) cathode material,thus improving the electrochemical performance of the material.The ratio performance of LiNi_(0.5)Mn_(1.5)O_(4) cathode material coated by 1%AlF_(3) and the first discharge specific capacity at low current density of 0.2C are improved.