標題: | Vanadium Substitution of LiFePO4 Cathode Materials To Enhance the Capacity of LiFePO4-Based Lithium-Ion Batteries |
作者: | Chiang, Ching-Yu Su, Hui-Chia Wu, Pin-Jiun Liu, Heng-Jui Hu, Chih-Wei Sharma, Neeraj Peterson, Vanessa K. Hsieh, Han-Wei Lin, Yu-Fang Chou, Wu-Ching Lee, Chih-Hao Lee, Jyh-Fu Shew, Bor-Yuan 電子物理學系 Department of Electrophysics |
公開日期: | 22-十一月-2012 |
摘要: | The mechanism of enhancing the capacity of the LiFePO4 cathodes in lithium ion batteries by the addition of a small amount of vanadium, which locate on the lithium site and induce lithium vacancies in the crystal structure, is reported in this article. As a result, the capacity increases from 138 mAh/g found for pristine LiFePO4 to 155 mAh/g for the V-added compound, and the conductivity increases from 4.75 x 10(-4) S/cm for the LiFePO4 without V addition to 1.9 x 10(-2) S/cm for the V-added compound. A possible model to facilitate the enhancement of conductivity and capacity is described with evidence supported by X-ray powder diffraction, X-ray absorption spectroscopy, and neutron powder diffraction data. |
URI: | http://dx.doi.org/10.1021/jp307047w http://hdl.handle.net/11536/20609 |
ISSN: | 1932-7447 |
DOI: | 10.1021/jp307047w |
期刊: | JOURNAL OF PHYSICAL CHEMISTRY C |
Volume: | 116 |
Issue: | 46 |
起始頁: | 24424 |
結束頁: | 24429 |
顯示於類別: | 期刊論文 |