摘要
采用固相合成的方法，以Li2CO3，TiO2为原料，分别以葡萄糖、柠檬酸、聚丙烯及三者的混合物作为碳源一步烧结合成了亚微米级的Li4Ti5O12／c复合负极材料,XRD结果显示其具有理想的尖晶石结构。研究结果表明，以葡萄糖作为碳源制备的Li4Ti5O12／c材料的性能最佳，其碳含量最高，为2．07％，0.5c和1c倍率下的放电容量分别达到了220和191mAh／g。
Sub-micron sized Li4Ti5O12/C composite for lithium batteries has been synthesized by an one-step solid-state method using TiO2-anatase, Li2CO3 and glucose, citric acid, polypropylene, and triple mixture as carbon precursors. X-ray diffraction shows that the as-prepared samples have a fine characteristic phase of spinel Li4Ti5O12. It was found that the Li4Ti5O12/C composite prepared using glucose as the carbon precursor possesses the highest carbon coating amount of about 2% and the best electrochemical performance, a discharge capacity of 220 or 191 mAh/g at the rates of 0.5C or 1C respectively.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2007年第A04期1423-1427,共5页
Journal of Functional Materials
