摘要
以三乙二醇水溶液为反应介质，在常压和108℃条件下，快速生成含有元素Li、Fe、P的前驱体。XRD和SEM分析表明，所得前驱体属于无定形结构，与一定量葡萄糖混合后在600℃下焙烧3h后得到的是纳米级的LiFePO4／C材料。电化学测试结果表明，这种纳米级LiFePO4／c材料在2．3～4．2V之间0．2C倍率下放电容量达到156．3mAh／g，并且具有较好的放电平台。5和10C放电容量仍能达到133．9和109．9mAh／g，表现出优异的倍率放电特性和循环性能。
The precursor contained element of Li,Fe,P was synthesized in the triethylene glycol （TEG）/H20 system under ambient pressure and 108℃ during a short time. The XRD and SEM results show that： the ob- tained precursor belonged to amorphous structure, and LiFePO4/C nanocomposites was obtained by sintering at 600℃ with a certain amount of glucose under inert atmosphere for 3h. Electrochemical tests showed that the special capacity of nanometer LiFePO4/C at discharge rates of 0. 2 was 156. 3mAh/g and has the better dis- charge platform. A capacity of 133.9mAh/g at 5C and 109.9mAh/g at 10C was even achievable, with no signif- icant capacity fading after 200 cycles. Show excellent rate discharge characteristics and cycle performance.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2013年第21期3143-3145,3148,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(21071046)
