Facile synthesis of potassium vanadate cathode material with superior cycling stability for lithium ion batteries

K0.25V2O5 compound demonstrating layer-by-layer stacked flake-like structure has been synthesized by a facile sol-gel route. Due to the novel tunneled crystal structure and excellent structural stability of K0.25V2O5, the electrodes demonstrate high specific capacity as well as good rate capability and superior long-term cycling stability up to 500 cycles.246