摘要
Non-stoichiometric LiFe1-xPO4/C composites were synthesized by a simple sol-gel method. Different impurities were detected in the X-ray diffraction measurements with the change of Fe content. The effects of Fe-poor on the structure and electrochemical performance of LiFePO4 were investigated. Compared with stoichiometric LiFePO4/C, non-stoichiometric samples show better electrochemical performance because they have smaller impedance and faster lithium ion diffusion. Among these non-stoichiometric samples, LiFe0.94PO4/C cathode delivers the highest capacity of 149 mAh g-1 at 0.2 C and 103 mAh g -1 at 5 C and no capacity loss was found after 100 full cycles.
源语言 | 英语 |
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文章编号 | 1450016 |
期刊 | Functional Materials Letters |
卷 | 7 |
期 | 2 |
DOI | |
出版状态 | 已出版 - 4月 2014 |
已对外发布 | 是 |