NaAlO_(2)包覆LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)正极材料的合成及电化学性能研究  

Synthesis and electrochemical properties of NaAlO_(2)coated LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)cathode material

作　　者：汪洋 王冰[1] 唐立丹[1] 仲为礼 商剑[1] 齐锦刚[1] WANG Yang;WANG Bing;TANG Lidan;ZHONG Weili;SHANG Jian;QI Jingang(School of Materials Science and Engineering,Liaoning University of Technology,Jinzhou 121000,China)

机构地区：[1]辽宁工业大学材料科学与工程学院,辽宁锦州121000

出　　处：《功能材料》2024年第12期12120-12125,共6页Journal of Functional Materials

基　　金：辽宁省教育科研资助项目(JJL201915409)。

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LiNi_(0.8)Co_(0.1)-Mn0.1O_(2)材料,与NaAlO_(2)煅烧后成功合成了由包覆NaAlO_(2)的LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)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)NaAlO_(2)@LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)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。Using lithium acetate,nickel acetate,cobalt acetate,and manganese acetate as raw materials and citric acid as a complexing agent,LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)was synthesized via the sol-gel method.After calcination with NaAlO_(2),LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)coated with NaAlO_(2)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%NaAlO_(2)@LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)exhibited an initial specific discharge capacity of 180.36 mAh/g at 1 C rate with a capacity retention rate of 79.2%after 200 cycles.Furthermore,it displayed improved electrochemical reversibility and reduced charge transfer resistance.

关 键 词：锂离子电池 正极材料 LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2) NaAlO_(2) 形貌结构 

分 类 号：O646[理学—物理化学]