| 高容量正极材料0.08LiCo0.75Al0.25O2-0.92LiNiO2的合成与电化学性能研究 |
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| 引用本文： | 王茹英,邱天,毛冲,杨文胜.高容量正极材料0.08LiCo0.75Al0.25O2-0.92LiNiO2的合成与电化学性能研究[J].电化学,2012(4):332-336. |
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| 作者姓名： | 王茹英 邱天 毛冲 杨文胜 |
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| 作者单位： | 北京化工大学化工资源有效利用国家重点实验室 |
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| 基金项目： | 国家自然科学基金项目(No.20971011);新世纪优秀人才计划项目(No.NCET-08-0713);中央高校基本科研业务费项目(No.ZD1004);北京市共建项目专项资助 |
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| 摘 要： | 在恒定pH值下将层状钴铝双羟基复合金属氧化物(CoAl-LDH)均匀包覆在球状Ni(OH)2表面,与LiOH.H2O混合均匀后,经高温煅烧制得钴铝酸锂包覆镍酸锂0.08LiCo0.75Al0.25O2-0.92LiNiO2正极材料.电化学测试表明,0.08LiCo0.75Al0.25O2-0.92LiNiO2正极比容量高,具有良好的倍率性能和循环寿命,其0.1C放电比容量为211 mAh·g-1,0.5C放电比容量为195.6 mAh·g-1,3C放电比容量为161 mAh·g-1,0.5C 30周期循环后容量保持率为93.2%,明显优于LiNiO2和钴酸锂包覆镍酸锂0.08LiCoO2-0.92LiNiO2正极.
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| 关 键 词： | 锂离子电池 正极材料 LiNiO2 LiCo0.75Al0.25O2 包覆 |
Synthesis and Electrochemical Properties of High-Capacity Cathode Material 0.08LiCo0.75Al0.25O2-0.92LiNiO2 |
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| WANG Ru-ying,QIU Tian,MAO Chong,YANG Wen-sheng.Synthesis and Electrochemical Properties of High-Capacity Cathode Material 0.08LiCo0.75Al0.25O2-0.92LiNiO2[J].Electrochemistry,2012(4):332-336. |
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| Authors: | WANG Ru-ying QIU Tian MAO Chong YANG Wen-sheng |
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| Institution: | (State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology, Beijing 100029,China) |
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| Abstract: | CoAl-LDH or Co(OH)2 coated spherical Ni(OH)2 precursors were obtained via a coprecipitation method at a constant pH.The mixtures of the precursors and LiOH·H2O were annealed at high temperature in O2 atmosphere,and then the cathode materials of 0.08LiCo0.75Al0.25O2-0.92LiNiO2,0.08LiCoO2-0.92LiNiO2 and LiNiO2 were synthesized.Effects of the coating layer were also studied.The results showed that the 0.08LiCo0.75Al0.25O2-0.92LiNiO2 material possessed the best rate and cycle life performance.The discharging capacities at 0.1C,0.5C and 3C were 211 mAh·g-1,195.6 mAh·g-1 and 161 mAh·g-1 respectively,and the capacity retention ratio after 30 cycles at 0.5C was 93.2%.These performances were much better than those of both pure LiNiO2 and 0.08LiCoO2-0.92LiNiO2. |
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| Keywords: | Li-ion battery cathode material LiNiO2 LiCo0 75Al0 25O2 coating |
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