摘要
通过对P123辅助水热法合成的样品煅烧获得LiFePO_4纳米片,其横向尺寸约为100nm。利用X射线衍射仪和扫描电镜等测试手段对制备出的样品的结构和形貌进行表征。结果表明,直接水热法制备的LiFePO_4样品是由自组装的片构成,其横向尺寸约为200nm。在N_2气氛保护和高温条件下对水热合成的样品进行煅烧后,LiFePO_4由自组装片分解为分散性良好的纳米片。由于具有纳米级尺寸和碳膜的包覆,由该LiFePO_4纳米片正极材料制作的锂离子电池具有较好的性能。
LiFePO_4 nanoflakes with a lateral size of ca. 100 nm have been prepared by calcining the samples synthesized via a conventional hydrothermal method assisted with triblocks copolymer P123. X-ray diffraction and scanning electron microscopy were employed to investigate the crystal structure and morphology of the obtained samples. The results show that the hydrothermally synthesized LiFePO_4 samples in the presence of P123 are composed of self-assembled flakes with a larger lateral size over 400 nm by the primary nanoflakes. After calcinations at high temperature in flowing N2, the self-assembled LiFePO_4 flakes decompose to nanoflakes with well dispersion. Moreover, due to the nanoscale in size and carbon film encapsulation, the as-prepared LiFePO_4 nanoflakes exhibit excellent performance as cathode applied in Li-ions battery.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2016年第S1期59-62,共4页
Rare Metal Materials and Engineering
基金
National Natural Science Foundation of China(61274004,51232006)
