| LiFePO4的蔗糖改性研究 |
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| 引用本文： | 张自禄,卢嘉春,李雪松,杨裕生.LiFePO4的蔗糖改性研究[J].电池,2007,37(1):3-5. |
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| 作者姓名： | 张自禄 卢嘉春 李雪松 杨裕生 |
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| 作者单位： | 西北核技术研究所,陕西,西安,710024;西北核技术研究所,陕西,西安,710024;西北核技术研究所,陕西,西安,710024;西北核技术研究所,陕西,西安,710024 |
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| 摘 要： | 用蔗糖作碳源,对锂离子电池正极材料LiFePO4进行了改性研究.蔗糖在高温炭化过程中产生的H2可与LiFePO4发生反应,生成Fe2P等杂质,导致活性物质的含量降低,材料的0.2 C(1.0 C=150 mA/g)比容量只有理论值的85%.蔗糖的加入使LiFePO4的粒径减小和导电性能提高,改善了高倍率充放电性能.含6.00%碳(质量分数)的材料的1.0 C、2.0 C和5.0 C放电比容量分别约为135 mAh/g、123 mAh/g和105 mAh/g,5.0 C下第300次循环的比容量为105 mAh/g.
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| 关 键 词： | 锂离子电池 LiFePO4 蔗糖 电化学性能 |
| 文章编号： | 1001-1579(2007)01-0003-03 |
| 修稿时间： | 2006年8月30日 |
The investigation of LiFePO4 modification with sucrose |
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| ZHANG Zi-lu,LU Jia-chun,LI Xue-song,YANG Yu-sheng.The investigation of LiFePO4 modification with sucrose[J].Battery Bimonthly,2007,37(1):3-5. |
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| Authors: | ZHANG Zi-lu LU Jia-chun LI Xue-song YANG Yu-sheng |
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| Abstract: | Li-ion battery cathode material LiFePO4 was modified by sucrose as carbon source.The hydrogen resulted from carbonization process at high temperature of sucrose could react with LiFePO4,the content of active material was reduced because of the producing of impurities such as Fe2P.The specific capacity of the material was only 85% of the theoretical value at 0.2 C(1.0 C=150 mA/g).The addition of sucrose decreased the particle size and improved the conductivity of LiFePO4,improved the charge-discharge performance at high rates.The specific capacities of the material with 6.00%(mass ratio) carbon were 135 mAh/g,123 mAh/g and 105 mAh/g at 1.0 C,2.0 C and 5.0 C,respectively,the specific capacity(5.0 C) at the 300th cycle was 105 mAh/g. |
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| Keywords: | LiFePO4 |
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