Investigation of positive electrode materials based on MnO2 for lithium batteries

My Loan Phung Le, Thi Xuan Binh Lam, Quoc Trung Pham and Thi Phuong Thoa Nguyen

Abstract

Various composite materials of MnO₂/C have been synthesized by electrochemical deposition and then used for the synthesis of lithium manganese oxide (LiMn₂O₄) spinel as a cathode material for lithium ion batteries. The structure and electrochemical properties of electrode materials based on MnO₂/C, spinel LiMn₂O₄ and doped spinel LiNi_0.5Mn_1.5O₄ have been studied. The influence of synthesis conditions on the structural and electrochemical properties of synthesized materials was investigated by x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electronic microscopy (TEM) and charge–discharge experiments. Some of the studied materials exhibit good performance of cycling and discharge capacity