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低共熔混合锂盐合成Co和Al共掺杂的LiNiO₂

Preparation of Co and Al coped LiNiO₂ cathode material by using eutectic mixed lithium salt with lower melting point

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【Author】 CHANG Zhao-rong~(1,2),QI Xia~2,WU Feng~1,TANG Hong-wei~2,WANG Jiang-liang~2(1.College of Chemical Engineering and Environment,Beijing Institute of Technology,Beijing 100080,China; 2.College of Chemistry and Environmental Science,Henan Normal University,Xinxiang 453007,Henan Province,China)

【机构】北京理工大学化工与环境学院；河南师范大学化学与环境科学学院；河南师范大学化学与环境科学学院北京100080；河南新乡453007；北京100080；

【摘要】在空气中,采用低共熔混合物L iNO3-L iOH为锂盐,制备了Co和A l共掺杂锂离子电池正极材料L iN i0.8Co0.15A l0.05O2。XRD分析表明,制得的正极材料具有完整的层状结构。电性能测试表明:在0.5 mA/cm2的放电电流密度和2.7—4.2 V的电压范围内,L iN i0.8Co0.15A l0.05O2首次放电比容量达147.6 mA.h/g,库仑效率达84.3%,第20次的放电比容量为133.8 mA.h/g。该合成新工艺,能制备出电化学性能良好的Co和A l共掺杂的L iN iO2正极材料。更多还原

【Abstract】 In air atmosphere,Co and Al doped cathode materials LiNi_0.8Co_0.15Al_0.05O₂ was prepared by using molten salt LiNO₃-LiOH with lower melting point as lithium salt for lithium ion battery.XRD results show that the prepared cathode materials have perfect layer structure.Electrochemical property tests testified that for charge-discharge current density of 0.5 mA/cm² and voltage of 2.7 V and 4.2 V,the initial discharge specific capacity of prepared LiNi_0.8Co_0.15Al_0.05O₂ is 147.6 mA·h/g,and coulomb efficiency is 84.3%.The discharge specific capacity is 133.8 mA·h/g for 20th cycle.Co and Al doped cathode materials LiNiO₂ with good electrochemical property can be prepared by this new technology.更多还原