Synthesis and electrochemical properties of LiNi_(0.87)Co_(0.10)Mg_(0.03)O_2 cathode materials  

LiNi_(0.87)Co_(0.10)Mg_(0.03)O_2正极材料的合成和电化学性能（英文）

作　　者：邓龙征[1] 吴锋[1] 高旭光[2,3] 刘震天[3] 谢海明 

机构地区：[1]北京理工大学化工与环境学院北京市环境科学与工程重点实验室,北京100081 [2]宁德新能源科技有限公司研究院,宁德352100 [3]东北师范大学化学系功能材料研究所国家及地方联合动力电池实验室,长春130024 [4]鸿森材料有限公司,广州510730

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第2期527-532,共6页中国有色金属学报（英文版）

基　　金：Project(2010DFA72760)supported by US.China Collaboration on Cutting-edge Technology Development of Electric Vehicles;Projects(50901009,51271029)supported by the National Natural Science Foundation of China;Project(12QNJJ013)supported by the Fundamental Research Funds for the Central Universities,China

摘　　要：A Co-Mg co-substituted LiNi0.87Co0.10Mg0.03O2 cathode material was prepared by a co-precipitation method. The prepared LiNi0.87Co0.10Mg0.03O2 exhibits excellent electrochemical properties, such as initial discharge capacities of 202.6 mA.h/g and 190.5 mA.h/g at 0.2C and 1C rate, respectively, in operating voltage range of 3.0-4.3 V （versus Li^＋/Li）. The capacity retentions are 96.1% and 93.4% at 0.2C and 1C, respectively, after 50 cycles. Moreover, the cycle performance of the sample was investigated in a 053048-type square Li ion battery. This type of battery can keep 81.7% of initial capacity after 500 charge-discharge cycles at 1C rate, which is close to that of commercial LiCoO2 battery. Therefore, the as-prepared material is capable of such high energy applications as portable product power.采用共沉淀法制备钻镁共掺的LiNi0．87Co0．10Mg0.03O2正极材料。结果表明，所制备的LiNi0．87Co0．10Mg0.03O2正极材料具备良好的电化学性能，在3．0-4．3V（Li^＋／Li）的条件下，该电极0．2C和1C的首次放电容量分别为202．6mA·h／g和190．5mA·h／g；经过50次循环后，该电极0．2C和1C的容量保持率分别为96．1％和93．4％。而且，将该材料制作成型号为053048的全电池，在1C充放500次后，电池的容量保持率为81．7％，性能接近工业用钻酸锂电池的水平。因此，采用该方法制备的正极材料能够用于高能量密度的移动数码产品。

关 键 词：lithium-ion batteries cathode material co-precipitation method cobalt-magnesium co-substitution ELECTROCHEMICALPROPERTIES 

分 类 号：TM912[电气工程—电力电子与电力传动]