Ga2O3-Li3VO4/NC nanofibers toward superb high-capacity and high-rate Li-ion storage

摘要

The high-rate performance of Ga2O3-based electrode has been seriously restricted by its modest reaction kinetics caused by the particular challenge of morphology regulation. Herein, Ga2O3-Li3VO4/N-doped C nanofibers (G-LVO/NC NFs) were successfully designed and firstly prepared via a concise electrospinning approach. The as-prepared G-LVO/NC NFs exhibit self-adaptive reaction kinetics owing to the synergistic effect among Ga2O3, Li3VO4, and N-doped C, resulting in superb high-rate Li-ion storage. After repeated rate-performance testing (4 periods) from 0.2 to 10.0 A g(-1) over 380 cycles, a high reversible capacity of 968.8 mA h g(-1) could be restored when reverting the current back to 0.2 A g(-1). When cycling at various high charge/discharge currents of 2.0/4.0, 4.0/6.0, 6.0/8.0, and 8.0/10.0 A g(-1), the G-LVO/NC NFs also deliver outstanding cyclability and high charge/discharge capacity of 606.5/608.6, 457.6/457.2, 435.6/435.8, and 317.1/317.9 mA h g(-1) after 2000 cycles, respectively, demonstrating great potential toward high power density application.

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