Synthesis, Characterization and Electrochemical Performance of Li2Mn0.7Fe0.3SiO4 Prepared from Solid-state Reaction

Xu, Yun Hua; Yang, Rong; Liu, Wen Gang

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Home > Materials Science Forum > Eco-Materials Processing and Design X > Synthesis, Characterization and Electrochemical...

Paper Title:

Synthesis, Characterization and Electrochemical Performance of Li₂Mn_0.7Fe_0.3SiO₄ Prepared from Solid-state Reaction

Periodical	Materials Science Forum (Volumes 620 - 622)
Main Theme	Eco-Materials Processing and Design X
Edited by	Hyungsun Kim, JienFeng Yang, Tohru Sekino and Soo Wohn Lee
Pages	17-20
DOI	10.4028/www.scientific.net/MSF.620-622.17
Citation	Wen Gang Liu et al., 2009, Materials Science Forum, 620-622, 17
Online since	April, 2009
Authors	Wen Gang Liu, Yun Hua Xu, Rong Yang
Keywords	Cathode Material, Electrochemical Performance, Lithium Manganese Iron Silicate, Solid State Reaction
Price	US$ 28,-

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Abstract

Li2MSiO4(M=Mn, Co, Ni) is a potential high capacity cathode material because of its outstanding properties that exchange of two electrons per transition metal atom is possible and the theoretical capacity of Li2MSiO4 can reach as high as 330 mAhg-1. In this family, the cathode performance of Li2MnSiO4 synthesized by solution route has been published recently. However, it seems that the cycle life of Li2MnSiO4 fell short of our expectation. In this work, the Li2Mn0.7Fe0.3SiO4 cathode material was synthesized by traditional solid-state reaction method. The prepared powder was consisted of majority of Li2Mn0.7Fe0.3SiO4 and minor impurities which were examined by XRD. FESEM morphology showed that the products of Li2Mn0.7Fe0.3SiO4 and Li2MnSiO4 have similar particle size (about 50-300 nm). The electrochemical performance of Li2Mn0.7Fe0.3SiO4, especially for reversible capacity and cycle life, exhibited better than those of Li2MnSiO4.