| 锂离子电池正极材料锰掺杂LiNi_（0.8）Co_（0.2）O_2的合成及其性能 |
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| 引用本文： | 刘辉,顾大明.锂离子电池正极材料锰掺杂LiNi_（0.8）Co_（0.2）O_2的合成及其性能[J].黑龙江工程学院学报,2010,24(2):58-61. |
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| 作者姓名： | 刘辉 顾大明 |
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| 作者单位： | 刘辉(黑龙江工程学院,材料与化学系,黑龙江哈尔滨150050);顾大明(哈尔滨工业大学,化学系,黑龙江哈尔滨150001) |
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| 摘 要： | 采用共沉淀法对LiNi0.8Co0.2O2进行Mn元素的掺杂改性,考察不同掺杂量对LiNi0.8Co0.2O2材料的结构和电化学性能的影响,并对LiNi0.8-xMnxCo0.2O2（0≤x≤3）进行X射线衍射和扫描电镜分析以及循环伏安测试。充放电测试结果显示：未掺杂Mn的LiNi0.8Co0.2O2材料的初始放电比容量为164.32 mAh/g,50次循环以后为161.86 mAh/g。经掺Mn后LiNi0.8Co0.2O2材料的初始放电比容量为163.13 mAh/g,并且50次循环以后还能保持在162.33 mAh/g左右,效率达到99%以上。研究表明,掺Mn后的LiNi0.8Co0.2O2材料具有更加稳定的层状结构,并且其循环性能得到很大程度的提高。
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| 关 键 词： | 锂离子电池 共沉淀法 掺杂 LiNi0.8-xMnxCo0.2O2 比容量 |
Synthesis and characterization of Mn-doped LiNi0.8Co0.2O2 as cathode materials for lithium-ion battery |
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| LIU Hui,GU Da-ming.Synthesis and characterization of Mn-doped LiNi0.8Co0.2O2 as cathode materials for lithium-ion battery[J].Journal of Heilongjiang Institute of Technology,2010,24(2):58-61. |
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| Authors: | LIU Hui GU Da-ming |
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| Affiliation: | 1.Dept.of Materials and Chemical,Heilongjiang Institute of Technology,Harbin 150050,China;2.Dept.of Applied Chemistry,Harbin Institute of Technology,Harbin 150001,China) |
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| Abstract: | A series of LiNi0.8-xMnxCo0.2O2（0≤x≤0.03） materials were synthesized via a co-precipitation precursor.The products were characterized by XRD,SEM,CV and EIS.The results of charge-discharge tests showed that the initial discharge specific capacities of undoped LiNi0.8Co0.2O2 was 164.32 mAh/g and its discharge specific capacities was 161.861 mAh/g after 50 cycles.The initial discharge specific capacities of Mn-doped LiNi0.8Co0.2O2 was 163.13 mAh/g,its discharge specific capacities could still retain about 162.33 mAh/g after 50 cycles,and coulombic efficiency was over 99%.Mn-doped LiNi0.8Co0.2O2 was concluded to strengthen the structural stability and improve cyclic performance. |
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| Keywords: | LiNi0 8-xMnxCo0 2O2 |
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