Among various vanadium-based materials, oxovanadium-based materials are promising candidates for lithium-ion battery electrodes because of their high capacity and low price. However, due to their fairly low conductivity and dissolution in electrolyte, the practical usage of oxovanadium-based materials shows poor rate capability and cycling stability. In this review, the recent progress in oxovanadium-based materials for lithium/sodium ion batteries is introduced and focused on their storage and capacity fading mechanisms. To overcome the low conductivity and irreversible phase transition, metal-doped, surface coating and conductive material composite are reviewed. Synthesis method, electrochemical performance and possible mechanism of typical modified electrode materials are discussed and the prospects of oxovanadium-based materials are also discussed.
Contents
1 Introduction
2 Structure characterization of vanadium oxide electrode materials
3 Electrochemical performance of vanadium oxide electrode materials
3.1 Lithium/sodium ion storage performance of vanadium oxide electrode materials
3.2 Vanadium oxide electrode materials for supercapacitors
3.3 Capacity fading mechanism of vanadium oxide electrode materials
4 Modification research of vanadium oxide electrode materials
4.1 Ion-doping
4.2 Surface coating
4.3 Conductive material composite
4.4 The lithium intercalation mechanism of modified vanadium oxide
5 Conclusion