LiNi_(0.5)Mn_(1.5)O_4-Li_(1.3)Al_(0.3)Ti_(1.7)(PO_4)_3复合正极材料的制备及性能研究  

Study on preparation and performance of LiNi_(0.5)Mn_(1.5)O_4-Li_(1.3)Al_(0.3)Ti_(1.7)(PO_4)_3 anode material

作　　者：韩迪 梁兴华[1,2] 常清泉 王云婷 吴秋满[1,2] Han Di;Liang Xinghua;Chang Qingquan;Wang Yunting;Wu Qiuman(Guangxi Key Laboratory of Auto Parts and Vehicle Technology,Guangxi University ofScience and Technology,Liuzhou 545001;Guangdong Academy of Sciences Institute ofNew Materials,Guangdong 510006)

机构地区：[1]广西汽车零部件与整车技术重点实验室广西科技大学,柳州545001 [2]广东省新材料研究所,广州510006

出　　处：《化工新型材料》2019年第3期198-202,共5页New Chemical Materials

基　　金：广西汽车零部件与整车技术重点实验室自主研究课题(15-A-03-01);广西汽车零部件与整车技术重点实验室开放课题(2015KFZD02);广西科技大学研究生教育创新计划项目(YCSW2017200);广西科技大学研究生教育创新计划项目(GKYC201617)

摘　　要：采用溶胶-凝胶法制备尖晶石型高电压正极材料LiNi_(0.5)Mn_(1.5)O_4(LNMO),并利用高速球磨和高温煅烧的方法制备复合材料LiNi0.5Mn1.5O4-Li1.3Al0.3Ti1.7(PO4)3。分别采用X射线衍射仪(XRD)、电子扫描显微镜(SEM)对其物相、形貌进行表征,采用循环伏安(CV)、交流阻抗和充放电测试对电化学性能测试分析。结果表明:LNMO-LATP复合材料具有比LNMO更稳定的循环性能和更好的倍率性能,室温下在0.05C放电时,LNMO包覆20%(wt,质量分数,下同)LATP、LNMO包覆40%LATP和LNMO的首次放电容量分别为120mAh/g、78mAh/g和100mAh/g。LNMO包覆20%LATP显示出更好的倍率性能。High voltage spinel-type anode Material LiNi0.5Mn1.5O4(LNMO)was prepared by sol-gel method,and composite high voltage materials LiNi0.5Mn1.5O4-Li1.3Al0.3Ti1.7(PO4)3 were prepared by high speed ball milling and high temperature calcination.The phase,surface morphology and electrochemical properties of prepared powders were characterized by X-ray diffraction,scanning electron microscopy,battery test electrochemical workstation and electrochemical impedance spectros-copy,respectively.The results showed that LATP with amorphous strcture covered closely the surface of LNMO.LATP layer can protect the electrode material surface and improved the dual role of lithium ion conductive,reduced the side reaction of electrode process,decreased the electrochemical polarization,provided more lithium ions diffusion channels.At room temperature in the 0.05 Cdischarge,LNMO doped 20%LATP,LNMO doped 40%LATP and the initial discharge capacity of LNMO was 120 mAh/g,78 mAh/g and 100 mAh/g.LNMO doped 20%LATP showed better rate performance.

关 键 词：Li1.3Al0.3Ti1.7(PO4)3 LINI0.5MN1.5O4 电化学 倍率性能 

分 类 号：TM912[电气工程—电力电子与电力传动]