NaA1O2包覆LiNi0.8Co0.1Mn0.1O2正极材料的合成及电化学性能研究
Synthesis and electrochemical properties of NaAlO2 coated LiNi0.8Co0.1Mn0.1O2 cathode material
汪洋 1王冰 1唐立丹 1仲为礼 1商剑 1齐锦刚1
作者信息
- 1. 辽宁工业大学材料科学与工程学院,辽宁锦州 121000
- 折叠
摘要
以乙酸锂、乙酸镍、乙酸钴、乙酸锰为原料,柠檬酸为络合剂,先利用溶胶凝胶法合成得到LiNi0.8Co0.1-Mn0.1O2材料,与NaAlO2煅烧后成功合成了由包覆NaAlO2的LiNi0.8Co0.1Mn0.1O2材料.通过XRD、SEM、EDS对样品结进行表征.结果表明,随着包覆量的增加,样品晶格间距变大,颗粒表面也由光滑变粗糙.电化学测试结果表明,在1C下2％(质量分数)NaAlO2@LiNi0.8Co0.1Mn0.1O2的初始放电比容量为180.36 mAh/g,200个循环后的容量保持率为79.2％,电化学可逆性较好且电荷转移电阻更小.
Abstract
Using lithium acetate,nickel acetate,cobalt acetate,and manganese acetate as raw materials and cit-ric acid as a complexing agent,LiNi0.8Co0.1Mn0.1O2 was synthesized via the sol-gel method.After calcination with NaAlO2,LiNi0.8Co0.1Mn0.1O2 coated with NaAlO2 was successfully prepared.XRD,SEM,and EDS were employed to characterize the structure and morphology of the samples.The results revealed that an increase in coating amount led to an expansion in lattice spacing while transforming the particle surface from smooth to rough texture.Electrochemical testing demonstrated that 2 wt％NaAlO2@LiNi0.8Co0.1Mn0.1O2 exhibited an ini-tial specific discharge capacity of 180.36 mAh/g at 1 C rate with a capacity retention rate of 79.2％after 200 cy-cles.Furthermore,it displayed improved electrochemical reversibility and reduced charge transfer resistance.
关键词
锂离子电池/正极材料/LiNi0.8Co0.1Mn0.1O2/NaAlO2/形貌结构Key words
lithium-ion battery/cathode material/LiNi0.8Co0.1Mn0.1O2/NaAlO2/morphological structure引用本文复制引用
出版年
2024
NETL
NSTL
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