【作者】 常照荣； 郁旭； 汤宏伟； 魏文强； 代冬梅；

【Author】 Chang Zhaorong,Yuxu,Tang Hongwei,Wei Wenqiang,Dai Dongmei (Henan Normal University Henan,XinXiang 453007 China)

【机构】 河南师范大学；

【摘要】 利用低共熔组成的0.38LiOH.H₂O-0.62LiNO₃混合锂盐体系与共沉淀合成的前躯体_Ni1/3Co_1/3Al_1/3（OH）₂简单混合,经三阶段温度烧结制备出锂离子电池正极材料LiNi_1/3Co_1/3Al_1/3O₂。经X-粉末射线衍射（XRD）分析表明:合成的LiNi_1/3Co_1/3Al_1/3O₂具有典型的a-NaFeO₂六方层状结构,其特征衍射峰I（003）/I（104）的峰强比值高达1.73。电性能测试表明:电压范围为2.8～4.3 V,充放电倍率为0.2C的条件下,首次充放电比容量为151.5mAh/g,20次循环后容量保持率为94.5%,1C和2C倍率放电容量仍可达到133.7mAh/g和120.9 mAh/g。更多还原

【Abstract】 A lithium-ion battery cathode material,LiNi_1/3Co_1/3Al_1/3O₂,with excellent electrochemical properties was prepared via three-phase temperature sintering,using eutectic lithium salts（0.38LiOH.H₂O-0.62LiNO₃） mixed with the precursor Ni_1/3Co_1/3Al_1/3（OH）₂. The well-layeredα-NaFeO₂ structure was confirmed by X-ray diffraction（XRD）.The ratio of characteristic diffraction peak I（003）/I（104） is high to 1.73.The charge-discharge test indicate synthesized powder showed a initial charge-discharge capacity of 151.5mAh/g at a specific current of 0.2C in the rang 2.8～4.3 V up to 20 cycles with no noticeable capacity-fading（94.5%of the first discharge capacity）, and the reversible capacity of 133.7 mAh/g and 120.9 mAh/g at a specific current of 1C and 2C charge-discharge rate.更多还原