铝盐对LiNi_(0.8)Co_(0.15)Al_(0.05)O_(2)正极材料性能的影响  

Effect of aluminum salts on the performance of LiNi_(0.8)Co_(0.15)Al_(0.05)O_(2) cathode material

作　　者：徐星 刘英杰 贺晓书 XU Xing;LIU Ying-jie;HE Xiao-shu(State Key Laboratory of Advanced Chemical Power Sources,Guizhou Meiling Power Sources Co.,Ltd.,Zunyi,Guizhou 563003,China;School of Material Science and Engineering,Nanchang Hangkong University,Nanchang,Jiangxi 330063,China)

机构地区：[1]贵州梅岭电源有限公司,特种化学电源国家重点实验室,贵州遵义563003 [2]南昌航空大学材料科学与工程学院,江西南昌330063

出　　处：《电池》2021年第6期603-605,共3页Battery Bimonthly

基　　金：贵州省科技计划项目(黔科合成果2021-104)。

摘　　要：采用共沉淀法和高温固相法制备LiNi_(0.8)Co_(0.15)Al_(0.05)O_(2)(NCA)正极材料。分别以异丙醇铝和偏铝酸钠作为铝源,制备Ni_(0.8)Co_(0.15)Al_(0.05)(OH)_(2)前驱体,将前驱体与LiOH·H_(2)O混合后进行750℃高温焙烧,得到两种NCA材料。以偏铝酸钠为铝源制备的NCA材料,层状结构更完善,电化学性能更好,以5.0 C倍率在3.0~4.3 V循环,放电比容量高达148 mAh/g;以1.0 C倍率循环90次,容量保持率为95.30%。LiNi_(0.8)Co_(0.15)Al_(0.05)O_(2)(NCA)cathode material was prepared by co-precipitation method and high temperature solid-state method.Ni_(0.8)Co_(0.15)Al_(0.05)(OH)_(2) precursors were prepared with aluminum isopropanol and sodium metaaluminate as aluminum sources,respectively.Then,the precursors were mixed with LiOH·H_(2)O and calcined at high temperature of 750℃to obtain two kinds of NCA materials.The NCA material prepared with sodium metaaluminate as the aluminum source had better layered structure and electrochemical performance.The specific discharge capacity was as high as 148 mAh/g when cycled at the rate of 5.0 C in 3.0-4.3 V,the capacity retention rate was 95.30%after 90 cycles at the rate of 1.0 C.

关 键 词：锂离子电池 正极材料 LiNi_(0.8)Co_(0.15)Al_(0.05)O_(2) 异丙醇铝 偏铝酸钠 

分 类 号：TM912.9[电气工程—电力电子与电力传动]