Fabrication of LiFePO4 crystal from precursor glass by reduction heat treatment

Abstract

LiFePO₄ is well known as candidate for the cathode material in lithium ion second battery. In previous study, we proposed that novel preparation method of LiFePO₄ ceramics from Li₂O-Fe(II)O-Nb₂O₅-P₂O₅ precursor glass. In this study we found that LiFePO₄ can be obtained by reduction heat treatment from 33.3Li₂O-33.3Fe(III)₂O₃-33.3P₂O₅ precursor glass, which is prepared by conventional melt quenching method in air. It found that the presence of Fe³⁺ is a effect for the glass formation.