Synthesis and characterization of MnV2O6 as a high capacity anode materialfor a lithium secondary battery

Crystalline MnV2O6 has been synthesized by a polymer gellation method and i nvestigated for its physical and electrochemical properties as an anode mat erial for Li secondary battery. The physical characterization was carried o ut by thermal analysis (TG/DTA), FT-IR and SEM. Structural analysis by powd er XRD and spectroscopic analysis by XANES showed that the synthesized comp ound is MnV2O6 with brannerite structure. The Li insertion of MnV2O6 anode during the first charge showed a large capacity of about 1400 mAh/g, accomp anied by irreversible structural transformation into amorphous material. De spite its structural transformation to amorphous during the first lithiatio n, subsequent cycles showed a capacity of about 800 mAh/g. This paper prese nts the advantage of this material over existing anode material and discuss es the mechanism underlying the electrode process. (C) 2001 Elsevier Scienc e BN. All rights reserved.