| Ag、C共包覆对LiFePO_4材料电化学性能的影响 |
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| 引用本文： | 胡益兰,张文魁,陶新永,甘永平,黄辉.Ag、C共包覆对LiFePO_4材料电化学性能的影响[J].广东化工,2010,37(7):26-28. |
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| 作者姓名： | 胡益兰 张文魁 陶新永 甘永平 黄辉 |
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| 作者单位： | 浙江工业大学,化学工程与材料学院,浙江,杭州,310014 |
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| 摘 要： | 采用葡萄糖还原法在固相法制备的LiFePO4基础上合成了Ag包覆的LiFePO4/Ag材料;同时采用一步法合成了碳银共包覆的LiFePO4/(Ag+C)材料。结果表明,Ag包覆将LiFePO4材料的首次放电容量由80mAhg-1提高到121mAhg-1;而碳银共修饰的LiFePO4/(Ag+C)材料具有更高的放电容量(132mAhg-1),并且具有更好的循环性能。此外,Ag包覆也大幅度降低了材料的电阻,电极的电荷转移电阻由253.5Ω降低到了54.8Ω。
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| 关 键 词： | LiFePO4/C Ag包覆 葡萄糖还原法 锂离子电池 |
The Influence of Coated of Ag and C on the Electrochemical Performance of LiFePO4 |
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| Hu Yilan,Zhang Wenkui,Tao Xinyong,Gan Yongping,Huang Hui.The Influence of Coated of Ag and C on the Electrochemical Performance of LiFePO4[J].Guangdong Chemical Industry,2010,37(7):26-28. |
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| Authors: | Hu Yilan Zhang Wenkui Tao Xinyong Gan Yongping Huang Hui |
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| Affiliation: | (College of Chemical Engineering and Materials Science, Zhejiang university of technology, Hangzhou 310014, China) |
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| Abstract: | LiFePO4/Ag material coatcd by Ag was symhesed on basis of LiFePO4 prepared by solid-phase by using glucose reduction method, and LiFePO4/（Ag＋C） material coated by carbon and silver was also synthesed by one-step method. The result showed that, comparing with the first discharge capacity of LiFePO4/Ag material coated by Ag which changed from 80 mAhg-1 to 121 mAhg-1, LiFePO4/（Ag＋C） material coated by carbon and silver had a higher discharge capacity （132 mAhg-1）, and better cycling performance. In addition, the material resistance was also significantly reduced from 253.5 Ω to 54.8 Ω. |
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| Keywords: | LiFePO4/C |
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