Open AccessStudy on the Preparation of Lifepo4 by Hydrothermal Method
Author(s) -
Y Liu,
Guoyong Luo,
Yixun Gu,
Fuzhong Wu,
Yi Mai,
Xinyi Dai
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/761/1/012004
Subject(s) - scanning electron microscope , materials science , hydrothermal circulation , electrochemistry , chemical engineering , cathode , diffraction , dispersion (optics) , phase (matter) , carbon fibers , coating , particle size , morphology (biology) , analytical chemistry (journal) , nanotechnology , composite material , chemistry , electrode , composite number , chromatography , organic chemistry , physics , optics , biology , engineering , genetics
A simple hydrothermal process combined with carbon coating is attempted to prepare nano particle LiFePO 4 cathode materials for Li-ion batteries. A carbon coating process with glucose is used to make LiFePO 4 /C composites. The structure, morphology and electrochemical properties of the materials are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and constant current charge/discharge. The X-ray diffraction pattern indicates that the pure phase LiFePO 4 material could be prepared at different reaction temperatures, and the pure phase LiFePO 4 material could not be prepared with the reaction time of 6 h. SEM test shows that the dispersion of LiFePO 4 particles become better with the increase of reaction temperatures and the morphology is more regular with the increase of reaction temperature. But when the reaction temperature increases to 200 °C, LiFePO 4 particles reaggregate severely. As the reaction time increases, the particles of the sample gradually grow. The electrochemical performance indicates that the sample synthesized at 180 °C for 10 h has the highest specific capacity of 139.5 mAh·g −1 at 0.1 C. This study shows that proposed process can be a potential promising way to prepare high performance LiFePO 4 cathode materials.