炭包覆和铜掺杂对LiFePO<sub>4</sub>的改性

官亦标; 吴 锋; 白 莹; 吴 川

炭包覆和铜掺杂对LiFePO₄的改性

1.
北京理工大学化工与环境学院, 北京 100081;
2.
国家高技术绿色材料发展中心, 北京 100081

基金项目: 国家973计划（2002CB211800， 2009CB220100）.

详细信息

作者简介:
官亦标(1980-)|男|湖北荆门人|博士|主要从事锂离子电池正极材料的研究. E-mail: gyb@bit.edu.cn

通讯作者:
吴锋，教授，博士生导师. Tel:＋86-10-68912508, Fax:＋86-10-68451429

中图分类号: TB 333
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出版历程
- 收稿日期: 2008-09-02
- 录用日期: 2009-12-29
- 修回日期: 2008-04-23
- 刊出日期: 2009-12-20

Modification of a LiFePO₄ cathode for lithium ion batteries by carbon coating and copper doping

1.
School of Chemical Engineering &|the Environment, Beijing Institute of Technology, Beijing 100081, China;
2.
National Development Center of High Technology Green Materials, Beijing 100081, China

Funds: State Key Development Program of Basic Research of China (2002CB211800, 2009CB220100).

More Information

Author Bio:
GUAN Yi-biao(1980-), male, Doctor, engaged in research of cathode materials for liion batteries.

Corresponding author: WU Feng, Professor. Tel: +86-10-68912508

摘要

摘要: 为了研究非金属元素包覆和金属元素掺杂对LiFePO₄的电化学性能和振实密度的影响，用固相反应法制备了炭包覆的LiFePO₄/C和铜掺杂的LiFe0.95Cu0.05PO₄正极材料，并对所制材料进行了XRD、SEM、充放电循环、倍率性能和振实密度的测试。结果显示：LiFePO₄/C和LiFe0.95Cu0.05PO₄的循环平均容量分别达到147mAh/g和131mAh/g；在高倍率放电时，LiFe0.95Cu0.05PO₄的容量衰减远大于LiFePO₄/C。LiFePO₄/C材料的各项电化学性能都优于LiFe0.95Cu0.05PO₄材料，而LiFe0.95Cu0.05PO₄材料的振实密度远大于LiFePO₄/C材料的振实密度，前者是后者的1.5倍。
- LiFePO₄ /
- 包覆 /
- 掺杂 /
- 倍率性能 /
- 振实密度
Abstract: The effects of a carbon coating and copper doping on the electrochemical performance and tap density of a LiFePO₄ cathode for lithium ion batteries were investigated by XRD, SEM, charge/discharge cycle tests, rate tests and tap density tests. Results showed that the average discharge capacity of LiFePO₄/C and LiFe_0.95Cu_0.05PO₄were 147mAh/g and 131mAh/g respectively. The capacity fading rate of LiFe_0.95Cu_0.05PO₄was much larger than that of LiFePO₄/C in a high-rate discharging test. The electrochemical performance of LiFePO₄/C was better than that of LiFe_0.95Cu_0.05PO₄, but the tap density of the latter was 1.5 times as large as that of the former.

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文章访问数: 1915
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PDF下载量: 1508
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炭包覆和铜掺杂对LiFePO₄的改性

作者简介:
官亦标(1980-)|男|湖北荆门人|博士|主要从事锂离子电池正极材料的研究. E-mail: gyb@bit.edu.cn

通讯作者:
吴锋，教授，博士生导师. Tel:＋86-10-68912508, Fax:＋86-10-68451429

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Modification of a LiFePO₄ cathode for lithium ion batteries by carbon coating and copper doping

Author Bio:
GUAN Yi-biao(1980-), male, Doctor, engaged in research of cathode materials for liion batteries.

Corresponding author: WU Feng, Professor. Tel: +86-10-68912508

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炭包覆和铜掺杂对LiFePO4的改性

作者简介: 官亦标(1980-)|男|湖北荆门人|博士|主要从事锂离子电池正极材料的研究. E-mail: gyb@bit.edu.cn

通讯作者: 吴 锋，教授，博士生导师. Tel:＋86-10-68912508, Fax:＋86-10-68451429

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出版历程

Modification of a LiFePO4 cathode for lithium ion batteries by carbon coating and copper doping

Author Bio: GUAN Yi-biao(1980-), male, Doctor, engaged in research of cathode materials for liion batteries.

Corresponding author: WU Feng, Professor. Tel: +86-10-68912508

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出版历程

目录

炭包覆和铜掺杂对LiFePO₄的改性

作者简介:
官亦标(1980-)|男|湖北荆门人|博士|主要从事锂离子电池正极材料的研究. E-mail: gyb@bit.edu.cn

通讯作者:
吴锋，教授，博士生导师. Tel:＋86-10-68912508, Fax:＋86-10-68451429

Modification of a LiFePO₄ cathode for lithium ion batteries by carbon coating and copper doping

Author Bio:
GUAN Yi-biao(1980-), male, Doctor, engaged in research of cathode materials for liion batteries.