Synthesis and Electrochemical Properties of Olivine-type Cathode Materials containing fine carbon for Lithium Batteries

Abstract

We have succeeded to disperse well fine carbon particles in Phospho-olivine LiFe_1-xMn_xPO₄ by a solid-state reaction in an Ar atmosphere. The grain growth has been depressed and Fe²⁺/Fe³⁺ ratio in LiFe_1-xMn_xPO₄ decreased by adding carbon particles. LiFe_1-xMn_xPO₄ containing fine carbon showed relatively large capacity and excellent electrochemical properties even at higher current density.