中国化学工程学报（英文版）
中國化學工程學報（英文版）
중국화학공정학보（영문판）
CHINESE JOURNAL OF CHEMICAL ENGINEERING
2014年
2期
234-237
,共4页
张艳洁%杨艳芳%王学勇%李帅三
張豔潔%楊豔芳%王學勇%李帥三
장염길%양염방%왕학용%리수삼
LiFePO4%supercritical hydrothermal synthesis%lithium iron
A supercritical hydrothermal method was employed to prepare sub-micrometer LiFePO4 particles with high purity and crystallinity. The structure and morphology of LiFePO4 particles were characterized by X-ray dif-fraction and scanning electron microscope. The electrochemical tests were carried out to determine the reversible capacity, rate and cycling performance of the LiFePO4 particles as cathode material for lithium ion battery. Experi-mental results show that solvent and calcining time have significant effects on purity, size and morphology of LiFePO4 particles. Mixed solvent contained deionized water and ethanol is conducive to synthesize smaller and more uniform particles. The size of LiFePO4 particles as-prepared is about 100-300 nm. The specific discharge ca-pacities of the LiFePO4 particles are 151.3 and 128.0 mA·h·g-1 after first cycle at the rates of 0.1 and 1.0 C, respec-tively. It retains 95.0%of the initial capacity after 100 cycles at 1.0 C.
