Insights into the storage mechanism of VS4 nanowire clusters in aluminum-ion battery

As promising electrode materials for aluminum-ion batteries (AIBs), transition metal sulfides have attracted significant attention. However, the relative low energy density and poor rate property restrict their further applications. Herein, channels-rich VS 4 nanowire clusters were synthesized via an amine ions-assisted method. When assessed as a cathode for rechargeable AIB, the VS 4 nanowire clusters exhibit superior electrochemical performances , specifically, outstanding rate property (103.32 mAh g -1 at 800 mA g -1 ), good cycling stability and a high reversible capacity of 252.51 mAh g -1 (at 100 mA g -1 ). Moreover, ex-situ X-ray diffraction (XRD) and in-situ Raman techniques reveal that the as-prepared VS 4 nanowire clusters have stable channels-rich structures, which is favorable for the mass transfer in electrochemical reaction . A mechanism of intercalation is proposed for the electrochemical process . This work takes a step toward the development of high-performance electrode materials for AIBs and provides new insights into the chemistry of AIBs for electrochemical energy storage .