结合共沉淀原理和腐蚀电化学原理, 提出了一种合成LiFePO4的新方法. 对新方法合成路线中的反应物、添加物以及热处理条件作了实验分析, 并用XRD分析了LiFePO4的晶体结构和晶粒尺寸分布, 用SEM分析了形貌, 用充放电测试技术分析了材料的比容量及其电化学性能. 结果表明: 新方法在合成中不引入其它杂质离子, 避免了常规共沉淀合成工艺中过滤、 洗涤等过程对LiFePO4前驱体的不利影响. 用新方法制备的LiFePO4晶粒分布在20-70 nm, 在0.1C下首次放电容量为\linebreak 147 mAh/g. 新方法有利于对LiFePO$_{4}$的Mg2+掺杂改性, 明显地提高LiFe1-xMgxPO4的电化学性能.
this paper describes a new synthesis route to prepare LiFePO4 cathode material. The novel aspect of the synthesis is based on a critical step involving the addition of CuO powder to promote the dissolve of Fe powder in Phosphate acid solution. The materials were characterized by thermogravimetric and differential thermal analysis, X-ray powder diffraction, Scanning electron microscopy and electrochemical measurements. Results shows that the prepared LiFePO4 materials display good electrochemical performance, suggests that the synthesis route has the possibility of an easy scale-up to an industrial process.
参考文献
| [1] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%