LiMn_2O_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  

Preparation and characterization of LiMn_2O_4/Li_(1.3)Al_(0.3)Ti_(1.7)(PO_4)_3 composite cathode materials

作　　者：王镇江[1] 常清泉 韩迪 梁兴华[1,2] 赵玉超 WANG Zhen-jiang;CHANG Qing-quan;HAN Di;LIANG Xing-hua;ZHAO Yu-chao(Guangxi Key Laboratory of Auto Parts and Vehicle Technology, Guangxi University of Science and Technology, Liuzhou Guangxi 545001, China;Guangdong Academy of Sciences Institute of New Materials, Guangzhou Guangdong 510006, China)

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

出　　处：《电源技术》2019年第2期188-190,共3页Chinese Journal of Power Sources

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(2017GKLACVTZZ04);广西科技大学研究生教育创新计划项目(YCS W2018202);广东省科学院实施创新驱动发展能力建设专项资金项目(2017GDAS CX-0202);广西新能源物流商用车协同创新研发及成果转化应用(2018AA18028Y)

摘　　要：采用高温固相法分别制备Li Mn_2O_4和Li_(1.3)Al_(0.3)Ti_(1.7)(P O_4)_3材料,分别以质量比8∶2和6∶4不同比例复合做正极材料,利用X射线衍射仪(XRD)和扫描电子显微镜(SEM)进行表征测试,恒流充放电、循环伏安法和电化学工作站研究其电化学性能,综合研究材料的性能。结果表明:质量比8∶2的样品颗粒分布比较均匀,边界清晰。通过电化学性能测试得出8∶2的样品首次冲放电效率可达到93.58%,纯的Li Mn_2O_4电极中样品的氧化还原峰更尖锐,电极反应速率快,氧化还原性能更好,纯的Li Mn_2O_4在0.1 C下循环50次后比容量保持率为90.3%。The spinel lithium manganese oxide (LiMn2O4) and Li1.3Al0.3Ti1.7 (PO4)3 materials were synthesized by high temperature solid phase method respectively. The positive electrode materials were prepared by different 8∶2 and 6∶4 mass ratios. The samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), constant current charge and discharge, cyclic voltammetry and electrochemical workstations to study their electrochemical properties and to comprehensively study the properties of materials. The results indicate that the distribution of 8∶2 particles is uniform and the boundary is clear. The redox peak of pure LiMn2O4 electrode is sharper, the electrode reaction rate is faster, the redox performance is better, and the specific capacity retention rate of the pure LiMn2O4 is 90.3%at 0.1 C after 50 cycles.

关 键 词：LIMN2O4 Li1.3Al0.3Ti1.7(PO4)3 复合电极 电化学性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]