(296c) V2O5 Network Structure As Cathode for Lithium Ion Batteries

V₂O₅ has been vigorously investigated as an electrode material because of its high output voltage, and low cost, and high capacity compared to most commercial cathode materials, including LiFePO₄, LiMn₂O₄, and LiCoO₂. The unique crystal structure which is formed by the stacking of V₂O₅ layers makes V₂O₅ a special host for the reversible insertion and extraction of lithium ions. Many works has been devoted to improve the performance of V₂O₅, including making V₂O₅/carbon matrix composite, V₂O₅ porous structure, and nanostructures, etc. 

In this work, we report a V₂O₅ network structure which is synthesized by a polymer-assisted chemical solution method. This V₂O₅ network structure delivers high and stable capacity of around 300, 200, and 120 mAh/g at current densities of 100, 400, and 800 mA/g after 50 cycles, respectively, which demonstrated an excellent stability and rate capability. The capacity and rate capability is better than most reported non-carbonaceous V₂O₅ structure. The high performance of the network structure comes from the unique two-dimensional network which bridges different length scales from the nanoscale to the micro/macro scale.