Manganese vanadium oxides for next generation energy storage systems

Nowadays, the quest for new high-theoretical capacity anode materials has been ceaseless since carbon anodes have reached their limit. Among various compounds, vanadium based anodes have offered excellent electrochemical behaviour due to their uniqueness related to their property like variable oxidation states, high specific capacity, etc. The variance of MVO (A₂B₂O₇, ABO₃, AB₂O₄, etc.) as anode materials has evidenced the rich structure and complex synergetic effects between the metal ions and the VO_x matrix. Among these, we have chosen Mn₂V₂O₇ as the energy-efficient anode material for lithium-ion storage application, synthesized through the solvothermal method and these MVO rods like structure were characterized by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Raman Spectroscopy analysis. Having cluster of rods gives the hope for the synergetic specific capacity of 499 mAh/g at 100 mA/g even after 50 cycles. With the addition of GDC (Glycine derived carbon) material as composite the specific capacity could be improved and gives hope to be a better anode for energy storage application. (author)