| 金属离子掺杂对LiFePO_4结构和性能的影响 |
| |
| 引用本文： | 陶兴华,唐致远.金属离子掺杂对LiFePO_4结构和性能的影响[J].电源技术,2010,34(11). |
| |
| 作者姓名： | 陶兴华 唐致远 |
| |
| 作者单位： | 天津大学化工学院应用化学系; |
| |
| 基金项目： | 教育部博士点基金，国家自然科学基金项 |
| |
| 摘 要： | 通过高温固相法,以金属氧化物(TiO2,V2O5,Nb2O5)作前驱体,合成了不同金属离子掺杂的LiFePO4/C复合材料。对以LiFePO4/C为正极的电池进行(XRD)、循环伏安和恒流充放电测试。结果表明,LiNb0.05Fe0.95PO4/C的电化学性能最好,0.05 C倍率下首次放电比容量达到154 mAh/g,即使在1 C倍率下放电,经过60次循环依然能保持在117 mAh/g左右。Fe位掺杂的效果与掺杂离子的半径、价态有密切关系,半径与Fe离子接近、价态高的离子对提高LiFePO4的电化学性能有利。
|
| 关 键 词： | 锂离子电池 磷酸铁锂 金属离子掺杂 |
Influence of doping different metallic ions on performance of LiFePO4 material |
| |
| TAO Xing-hua,TANG Zhi-yuan.Influence of doping different metallic ions on performance of LiFePO4 material[J].Chinese Journal of Power Sources,2010,34(11). |
| |
| Authors: | TAO Xing-hua TANG Zhi-yuan |
| |
| Affiliation: | TAO Xing-hua,TANG Zhi-yuan(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China) |
| |
| Abstract: | In this paper,LiFePO4/C composite material doped with different metallic oxides(TiO2,V2O5,Nb2O5) was synthesized by solid-state method.The LiFePO4/C samples were characterized by XRD,CV and electrochemical charge/discharge tests.The results indicate that LiNb0.05Fe0.95PO4/C samples have an initial capacity of 154 mAh/g at 0.05 C,and they are capable of delivering reversible capacities of about 117 mAh/g even at 1 C discharge rate.The LiFePO4/C material doped with ions of similar radius with Fe2+ and higher ... |
| |
| Keywords: | lithium ion battery LiFePO4 ions doping |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
