文献类型：期刊文献

中文题名：pH值对溶胶-凝胶自蔓延燃烧法制备LiNi0.5Co0.2Mn0.3O2的影响研究

英文题名：Effect of p H value on the preparation of LiNi0.5Co0.2Mn0.3O2 by sol-gel selfpropagating combustion method

作者：李伟伟[1]

第一作者：李伟伟

机构：[1]新乡学院化学化工学院

第一机构：新乡学院化学化工学院

年份：2018

卷号：28

期号：6

起止页码：38-41

中文期刊名：粉末冶金工业

外文期刊名：Powder Metallurgy Industry

收录：CSTPCD;;北大核心:【北大核心2017】；

基金：国家自然科学基金项目(51304064)

语种：中文

中文关键词：废旧正极;溶胶-凝胶;自蔓延燃烧;LiNi0.5Co0.2Mn0.3O2

外文关键词：waste cathode;sol-gel;self propagating combustion;LiNi0.5Co0.2Mn0.3O2

摘要：以废旧NiCoMn三元材料为原材料,采用溶胶-凝胶自蔓延燃烧法制备LiNi0.5Co0.2Mn0.3O2锂离子电池正极三元复合材料,通过TG、XRD、SEM、蓝电测试仪对其结构、形貌和电化学性能进行表征。结果表明,该材料不仅具有较好的层状结构,还具有多孔的特性;pH值为8时制备的样品,在0.2 C、2.75~4.30 V测试条件下,首次放电容量为164.6(mA·h)/g,库伦效率约85.8%,经过30次循环后,容量保持率为94.9%,是一种电化学性能优良的三元正极复合材料。
LiNi0.5Co0.2Mn0.3O2,the eligible ternary cathode materials of lithium ion batteries,were synthesized by sol-gel self propagating combustion method using waste NiCoMn ternary material as raw material. The composite was characterized by TG,XRD,SEM and land testing. The results indicate that the material not only has a good layered structure,but also has porous properties. The discharge capacity of the product synthesized at pH=8 is 164.6 (mA·h)/g in 2.75-4.30 V at 0.2 C,the coulomb efficiency is about 85.8%, and the capacity retention rate is about 94.9% after 30 cycles. This material is an excellent ternary cathode material with high discharge specific capacity.