High capacity Li3VO4-Ga2O3/NC as durable anode for Li-ion batteries via robust pseudocapacitive charge storage

Abstract Nitrogen doped carbon bridged Li3VO4-Ga2O3 hybrid (Li3VO4-Ga2O3/NC) is first synthesized through an intermediate solution method with subsequent annealing. The Li3VO4-Ga2O3/NC hybrid exhibits robust pseudocapacitive charge storage owing to the synergetic effect between each component, resulting in ultra-high capacity and ultra-stable cyclability as anode for Li-ion batteries. At a specific current of 0.1 A g-1, the Li3VO4-Ga2O3/NC electrode delivers high reversible capacity of 652.6 mAh g-1 after 400 cycles, without obvious capacity attenuation over cycling. After three periodic rate performance testing from 0.1 to 2.0 A g-1 over 260 cycles, the Li3VO4-Ga2O3/NC electrode delivers high discharge capacity of 750.3 mAh g-1 when reverting current to 0.1 A g-1. The Li3VO4-Ga2O3/NC electrode also shows excellent long cycle stability at 1.0 A g-1, delivering high discharge capacity of 450.4 mAh g-1 after 1600 cycles.