| 尖晶石型锰酸锂正极材料LiNi0.01Co0.03Mn1.96O4的 合成及电化学性能 |
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| 引用本文： | 段玉珍,朱金玉,郭俊明,向明武,刘晓芳,白红丽,苏长伟.尖晶石型锰酸锂正极材料LiNi0.01Co0.03Mn1.96O4的 合成及电化学性能[J].高等学校化学学报,2019,40(12):2574. |
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| 作者姓名： | 段玉珍 朱金玉 郭俊明 向明武 刘晓芳 白红丽 苏长伟 |
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| 作者单位： | 云南民族大学化学与环境学院,生物基材料绿色制备技术国家地方联合工程研究中心,云南省高校绿色化学材料重点实验室,昆明650500 |
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| 基金项目： | 国家自然科学基金(U1602273);国家自然科学基金(51972282) |
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| 摘 要： | 采用固相燃烧法制备了具有多面体形貌的Ni-Co共掺杂尖晶石型LiNi0.01Co0.03Mn1.96O4(LNCMO)正极材料. 研究结果表明, LNCMO具有优异的倍率性能和长循环稳定性, 在25 ℃, 1C或5C倍率条件下, 初始放电比容量分别为110.6和102.3 mA·h/g, 循环1000次后容量保持率为75.7%和78.3%; 在10C和20C高倍率下, 循环1000次后, 容量保持率分别为78.8%和54.2%; 即使在高温(55 ℃)和1C倍率下, 循环1000次后容量保持率仍为76.6%. LNCMO具有较大的Li +扩散系数(4.77×10 -11 cm 2/s)和较低的表观活化能(23.37 kJ/mol).
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| 关 键 词： | Ni-Co共掺杂 尖晶石型LiMn2O4 固相燃烧法 锂离子电池 |
| 收稿时间： | 2019-06-19 |
Synthesis and Electrochemical Properties of Spinel Lithium Manganese Cathode Material LiNi0.01Co0.03Mn1.96O4 ? |
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| Yuzhen DUAN,Jinyu ZHU,Junming GUO,Mingwu XIANG,Xiaofang LIU,Hongli BAI,Changwei SU.Synthesis and Electrochemical Properties of Spinel Lithium Manganese Cathode Material LiNi0.01Co0.03Mn1.96O4 ?[J].Chemical Research In Chinese Universities,2019,40(12):2574. |
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| Authors: | Yuzhen DUAN Jinyu ZHU Junming GUO Mingwu XIANG Xiaofang LIU Hongli BAI Changwei SU |
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| Institution: | School of Chemistry and Enviroment, National and Local Joint Engineering Research Center for Green Preparation Technology of Bio-based Materials, Key Laboratory of Green Chemical Materials in Universities of Yunnan Province, Yunnan Minzu University, Kunming 650500, China |
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| Abstract: | Ni-Co co-doped LiNi0.01Co0.03Mn1.96O4(LNCMO) cathode material with a polyhedral morphology was prepared via a solid-state combustion method. Results show that the LNCMO sample has excellent rate performance and long cycling stability, it delivers the initial discharge capacity of 110.6 and 102.3 mA·h/g with capacity retention rate of 75.7% and 78.3% after 1000 cycles at 1C and 5C at 25 ℃, respectively. At high current rate of 10C and 20C, the capacity retention rates of 78.8% and 54.2% are obtained after 1000 cycles, respectively. Even at 1C under high temperature of 55 ℃, the capacity retention rate of 76.6% is also maintained after 1000 cycles. The LNCMO sample shows larger Li + ion diffusion coefficient(4.77×10 -11 cm 2/s) and lower apparent activation energy(23.37 kJ/mol) compared to the Co-doped sample. |
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| Keywords: | Ni-Co co-doping Spinel LiMn2O4 Solid-state combustion method Lithium ion battery |
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