Open AccessPreparation of Micro–Nano-Structured FePO4·2H2O for LiFePO4 Cathode Materials by the Turbulent Flow Cycle Method
Author(s) -
Xianglan Ming,
Ruizi Wang,
Teng Li,
Xixi Wu,
Liangjie Yuan,
Yu Zhao
Publication year - 2021
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.1c02216
Subject(s) - scanning electron microscope , materials science , cathode , thermogravimetric analysis , transmission electron microscopy , carbon fibers , composite number , electrochemistry , chemical engineering , nano , analytical chemistry (journal) , nanotechnology , composite material , electrode , chemistry , chromatography , engineering
The micro-nano-structured FePO 4 ·2H 2 O was prepared from mixed solution of FeSO 4 oxidized in diluted H 3 PO 4 with H 2 O 2 and NaOH solution in the turbulent flow cycle state at 90 °C. The resulting products were characterized by thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Constant current charge/discharge tests were adopted to investigate the electrochemical performance and the rate capability (from 0.1C to 5C) of the carbon-coated LiFePO 4 composite materials prepared from the micro-nano-structured FePO 4 . The carbon-coated LiFePO 4 composite materials deliver a high specific discharge capacity of 153.7 mAh·g -1 , exhibit excellent cycle performance with 98.6% of the capacity retained after 30 cycles. This study demonstrates that the turbulent flow cycle method may be an economical and effective method for industrial production of fine and uniform micro-nano-structured FePO 4 ·2H 2 O particles for LiFePO 4 cathode materials for Li-ion batteries.