| 锂离子电池正极材料LiV3O8-xClx的低温固相法合成及电化学性能研究 |
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| 引用本文： | 刘黎,焦丽芳,孙均利 刘思晨 袁华堂 王永梅.锂离子电池正极材料LiV3O8-xClx的低温固相法合成及电化学性能研究[J].中国化学,2009,27(6):1093-1098. |
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| 作者姓名： | 刘黎 焦丽芳 孙均利 刘思晨 袁华堂 王永梅 |
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| 作者单位： | 南开大学新能源材料化学研究所，高效储能教育部工程研究中心，天津市储能重点实验室300071 |
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| 摘 要： | 采用低温固相法成功地合成了锂离子电池正极材料LiV3O8-xClx (x=0.00，0.05，0.10，0.15)。分别用XRD、SEM、充放电实验、循环伏安、交流阻抗等测试方法研究了Cl- 的掺入对LiV3O8结构、形貌及电化学性能的影响。结果表明, Cl-的掺入显著地提高了材料的充放电循环性能。当掺杂量 x=0.10时，材料的循环性能最好， 循环100周后放电容量仍为198.6 mAh/g。
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| 关 键 词： | LiV3O8 正极材料 掺杂 锂离子电池 |
| 收稿时间： | 2008-10-8 |
| 修稿时间： | 2009-1-1 |
Electrochemical Performance of LiV3O8−xClx Cathode Materials Synthesized by a Low‐Temperature Solid State Method |
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| Li LIU,Lifang JIAO,Junli SUN,Sichen LIU,Huatang YUAN,Yongmei WANG.Electrochemical Performance of LiV3O8−xClx Cathode Materials Synthesized by a Low‐Temperature Solid State Method[J].Chinese Journal of Chemistry,2009,27(6):1093-1098. |
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| Authors: | Li LIU Lifang JIAO Junli SUN Sichen LIU Huatang YUAN Yongmei WANG |
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| Institution: | 1. Institute of New Energy Material Chemistry, Engineering Research Center of Energy Storage & Conversion (Ministry of Education) and Key Laboratory of Energy‐Material Chemistry (Tianjin), Nankai University, Tianjin 300071, China;2. Tel.: 0086‐022‐23498089;3. Fax: 0086‐022‐23502604 |
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| Abstract: | A series of cathode materials for lithium ion batteries with the formula LiV3O8?xClx (x=0.00, 0.05, 0.10 and 0.15) were synthesized by a low‐temperature solid‐state method. The effects of Cl? substitution on the structure, morphology and electrochemical properties of the cathode materials were investigated through X‐ray diffraction (XRD), scanning electron microscopy (SEM), charge‐discharge test, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) experiments. The results show that an enhanced cycle performance is on the Cl? doped cathode materials. LiV3O7.90Cl0.10 shows the best electrochemical performances with the discharge capacity remaining 198.6 mAh/g after 100 cycles, which results from a greater reversibility during cycling and decrease of particle‐to‐particle impedance. |
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| Keywords: | LiV3O8 cathode material doping lithium ion battery |
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