电池2013，Vol.43Issue(1)：18-21,4.
水热还原法制备的LiFePO4/C的性能
Performance of LiFePO4/C synthesized by thermal reduction method
文倩倩 1贾梦秋1
作者信息
- 1. 北京化工大学材料科学与工程学院,北京 100029
- 折叠
摘要
Abstract
Olivine-type carbon coated lithium iron phosphate (LiFePO4/C) was synthesized by hydrothermal reduction method using water,ethanol,ethylene glycol as solvent and polyvinylalcohol (PVA) as reductant and carbon-coated agent. The crystalline structure, morphology and electrochemical performance were investigated by XRD,SEM and charge-discharge measurements. The surface free energy was calculated based on the method suggested by Wu.The LiFePO4/C was single olivine type crystal structure and the product prepared with ethylene glycol had the largest ratio of the dispersive part of surface free energy (γds) to the polar part (γps), that was γds/γps, as well as the best coating and conductivity with 300 ~ 400 nm uniformly spherical structure. The 0.1 C initial specific discharge capacity of the product in 2.2 ~ 4.4 V was 164.95 mAh/g, the retention was 96% at the 50th cycle. The specific discharge capacity could reach 125 mAh/g at 10 C,85 mAh/g at 15 C,retention was all above 99% after 10 cycles.关键词
溶剂/水热还原法/絮状聚乙烯醇(PVA)/磷酸铁锂(LiFePO4)Key words
solvent/ hydrothermal reduction/ polyvinylalcohol (PVA) / lithium iron phosphate (LiFePO4)分类
信息技术与安全科学引用本文复制引用
文倩倩,贾梦秋..水热还原法制备的LiFePO4/C的性能[J].电池,2013,43(1):18-21,4.
