Recent progress in graphene-assisted vanadium oxide nanocomposites towards advanced lithium-ion battery electrodes

Graphene assisted Vanadium oxide (VO x ) nanocomposites have gathered the significant interest as potential electrode materials in the next-generation Lithium-ion Batteries LIBs because of the synergistic merits of the two constituents in which graphene tends to possess the best electrical conductivity and mechanical strength, whereas vanadium oxides tend to have a high discharge capacity and flexible redox properties. Recent work describes various synthesis strategies such as solvothermal, hydrothermal and co-precipitation all have great effect on morphology, interfaces bonding and charge-transport properties of such materials. Graphene is important in improving VO x stability, rate capability and structural stability during repeated cycling. Representative performances highlight this synergy V 2 O 5 /rGO composites are capable of delivering similar results (discharge capacity 280 mAhg −1 with 91% capacity retention in 1000 cycles) whereas layered V 2 O 5 nanofibers are capable of delivering similar results (discharge capacity 250.7 mAhg −1 with 82% capacity retention in 150 cycles). Such nanocomposites used as a cathode, anode and hybrid electrodes that shows high potential in enhancing capacity, efficiency and long-term stability. Although some of the issues are structural degradation and scalability, there are new avenues to consider in enhancing high-performance, long-lasting LIB technologies with emerging approaches, including defect engineering, 3D graphene structures and solid-state designs.