| Ni-Mn共掺杂高电压钴酸锂锂离子电池正极材料 |
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| 引用本文： | 胡国荣,卢苇,梁龙伟,曹雁冰,彭忠东,杜柯. Ni-Mn共掺杂高电压钴酸锂锂离子电池正极材料[J]. 无机化学学报, 2013, 29(18) |
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| 作者姓名： | 胡国荣 卢苇 梁龙伟 曹雁冰 彭忠东 杜柯 |
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| 作者单位： | 中南大学冶金与环境学院, 长沙 410083;中南大学冶金与环境学院, 长沙 410083;中南大学冶金与环境学院, 长沙 410083;中南大学冶金与环境学院, 长沙 410083;中南大学冶金与环境学院, 长沙 410083;中南大学冶金与环境学院, 长沙 410083 |
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| 基金项目： | 国家自然科学基金(No)资助项目。 |
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| 摘 要： | 以金属硫酸盐为原料,NaOH和NH3·H2O为沉淀剂,用共沉淀法合成了Co0.9Ni0.05Mn0.05(OH)前驱体,再进行配锂并通过高温固相法合成了Ni-Mn共掺杂高电压钴酸锂锂离子电池正极材料Li(Co0.9Ni0.05Mn0.05)O2。用X射线衍射(XRD)、扫描电镜(SEM)、 循环伏安(C-V)、交流阻抗(EIS)和充放电测试研究样品的晶体结构、形貌和电化学性能。结果表明Ni-Mn共掺杂正极材料Li(Co0.9Ni0.05Mn0.05)O2有优秀的电化学性能:在3.0~4.4 V和3.0~4.5 V区间,0.5C倍率下首次放电比容量分别为162 mAh·g-1和187 mAh·g-1,循环100次后容量保持率分别为94%和94%。
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| 关 键 词： | 高电压钴酸锂 共掺杂 共沉淀法 电化学性能 |
Ni, Mn-Codoped High-Voltage LiCoO2 Cathode Material for Lithium Ion Batteries |
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| HU Guo-Rong,LU Wei,LIANG Long-Wei,CAO Yan-Bing,PENG Zhong-Dong and DU Ke. Ni, Mn-Codoped High-Voltage LiCoO2 Cathode Material for Lithium Ion Batteries[J]. Chinese Journal of Inorganic Chemistry, 2013, 29(18) |
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| Authors: | HU Guo-Rong LU Wei LIANG Long-Wei CAO Yan-Bing PENG Zhong-Dong DU Ke |
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| Affiliation: | School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China;School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China;School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China;School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China;School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China;School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China |
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| Abstract: | The precursor Co0.9Ni0.05Mn0.05(OH)2 of the high-voltage cathode material for lithium ion batteries was synthesized by hydroxide co-precipitation method using the transition metal sulphate as the raw material, NaOH and NH3·H2O as the precipitate agents. Then the corresponding Li(Co0.9Ni0.05Mn0.05)O2 was obtained when mixing the precursor with Li2CoO3 by high solid method. Crystal structure, morphology and electrochemical performance of the sample were investigated by XRD, SEM, Cyclic voltammetry (C-V) method, electrochemical impedance spectroscopy (EIS) test and charge-discharge test. Mixed doping Ni-Mn material Li(Co0.9Ni0.05Mn0.05)O2 shows better electrochemical performance compared to LiCoO2 as confirmed by the results of C-V, XRD and EIS. When the co-doped product Li(Co0.9Ni0.05Mn0.05)O2 was charged to 4.4 and 4.5 V, the initial discharge capacity is 162 mAh·g-1 and 187 mAh·g-1 at 0.5 C rate, respectively. After cycling for 100 times, the retention of discharge capacity was 94% and 94%, respectively. |
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| Keywords: | high-voltage LiCoO2 codoped co-precipitation electrochemical performance |
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