摘要
采用单一碳源和复合碳源,以固相反应法合成了碳包覆型LiFePO4正极材料。借助ECT、XRD、SEM和循环伏安仪对LiFePO4正极材料进行了表征,研究了不同包覆碳源对所制LiFePO4正极材料电化学性能的影响。结果表明,与使用其他碳源相比,在使用六次甲基四胺与蔗糖作为复合碳源时,LiFePO4正极材料的包覆碳量降低了40%左右;首次可逆放电容量提高了20%左右,达到141mAh/g;循环20次后的容量保持率提高了2%左右。由该种LiFePO4正极材料制作的锂离子电池具有较好的自我修复能力。
Carbon-coated LiFePO4 cathode material was synthesized by the solid state reaction method.Both the single carbon source and complex carbon source were employed for the preparation of the LiFePO4 material.ECT,XRD,SEM and CV tester were used for the characterizations of the LiFePO4 material,and the effects of carbon source on the electrochemical properties of the LiFePO4 material were studied.The results show that,compared with the LiFePO4 material made from other carbon sources,the carbon content of the LiFe...
出处
《电子元件与材料》
CAS
CSCD
北大核心
2010年第8期39-43,共5页
Electronic Components And Materials
基金
电子科技大学"杰出人才引进项目"
新乡市群力电源材料有限公司与新乡市天力能源材料有限公司资助项目
