摘要
采用高温固相法合成锂离子蓄电池正极材料LiFePO4,研究了反应温度、时间对合成产物的影响。利用X射线衍射(XRD)、扫描电镜(SEM)对所得样品的晶体结构、表面形貌等进行分析研究。实验证明,反应温度和反应时间对产物结构和性能有较大影响,其中,650 ℃下焙烧20 h合成出的样品电性能最佳,以0.1 C充放电,首次放电容量为111.6 mAh/g。
The cathode material of LiFePO4 for lithium-ion battery was synthesized by high temperature solid-state reaction method. The effects of synthesis temperature, reaction time were discussed and the crystalline structure, morphology of particles of the samples were investigated by X-ray diffraction, scanning electromicroscope. The results showed that the reaction temperature and time influenced the structure and performance of the products. The products sintered at 650 ℃ for 20 h possessed excellent electrochemical performance. The first specific discharge capacity reached 111.6 mAh/g at 0.1 C rate.
出处
《电源技术》
CAS
CSCD
北大核心
2004年第12期748-750,共3页
Chinese Journal of Power Sources
基金
国家自然科学基金资助项目(50302016)
关键词
锂离子蓄电池
正极材料
磷酸铁锂
合成
Li-ion battery
cathode material
lithium iron phosphate
preparation
