| 锰掺杂LiNi0.8Co0.2O2的合成及电极性能研究 |
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| 引用本文： | 高农,王虹,顾大明.锰掺杂LiNi0.8Co0.2O2的合成及电极性能研究[J].电机与控制学报,2005,9(4):349-351,356. |
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| 作者姓名： | 高农 王虹 顾大明 |
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| 作者单位： | 黑龙江工程学院,电子工程系,黑龙江,哈尔滨,150050;哈尔滨理工大学,化学与环境工程学院,黑龙江,哈尔滨,150040;哈尔滨工业大学,理学院,黑龙江,哈尔滨,150001 |
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| 基金项目： | 黑龙江省自然科学基金;黑龙江省科技攻关项目;黑龙江省哈尔滨市科技攻关项目 |
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| 摘 要： | 为了获得高性能锂离子电池的正极材料,采用共沉淀法,对LiNi0.8Co0.2O2进行Mn元素的掺杂改性,考察了不同Mn掺杂量对LiNi0.8Co0.2O2材料的结构和其电化学性能的影响,并对材料进行X射线衍射、扫描电镜、循环伏安分析和恒流充放电测试。实验表明,锰掺杂改善了LiNi0。8Co0.2O2材料循环性能,LiNi0.78Nn0.02Co0.2O2的首次放电比容量达到180.8mA·h/g,50循环后放电比容量还能保持在169.8mA·h/g,50循环比容量保持率达到94%。
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| 关 键 词： | 共沉淀法 锰掺杂 LiNi0.8Co0.2O2 正极材料 锂离子电池 |
| 文章编号： | 1007-449X(2005)04-0349-03 |
| 修稿时间： | 2004年9月15日 |
Synthesis and characterization of Mn-doped LiNi0. 8Co0.2O2 as cathode materials for lithium-ion battery |
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| GAO Nong,WANG Hong,GU Da-Ming.Synthesis and characterization of Mn-doped LiNi0. 8Co0.2O2 as cathode materials for lithium-ion battery[J].Electric Machines and Control,2005,9(4):349-351,356. |
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| Authors: | GAO Nong WANG Hong GU Da-Ming |
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| Abstract: | Electrical Batteries play an important role in the automotive industry, and doping - modified LiNi0.8Co0.2O2 is a new promising candidate cathode materials for lithium secondary batteries. A series of Mn-doped LiNi0.8Co0.2O2 materials were synthesized via a coprecipitation method. The effects of Mn content on the electrochemical properties of the materials were investigated. The products were characterized by X -ray diffraction(XRD) , scanning electronic microscopy (SEM) , cycling voltammetry and gal-vanostatic cycle(0. 2C, 3. 0-4. 2V) . As the results, the cycling property of the materials was improved by Mn -doped. The first discharge specific capacities of LiNi0.78Mn0.02Co0.2O2 was over 180mAh/g, its discharge specific capacities could still retain about 170mAh/g after 50 cycles, and the specific capacity retention was up to 94% . |
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| Keywords: | LiNi0 8Co0 2O2 |
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