Multiscale bridged and synergistic interface engineering of Ga2O3@rGO as an anode for lithium-ion batteries

[Display omitted] •A multi-scale Ga2O3@rGO is synthesized by hydrothermal and freeze-drying strategies.•Ga2O3@rGO exhibited outstanding rate capability and long-life cyclic property.•rGO can provide a porous space to alleviate the Ga2O3 change of Li anode. Ga2O3 has been used as an anode for lithium batteries due to its high theoretical capacity. However, limited electronic conductivity and severe volume expansion limit its application. Herein, to circumvent these issues, we proposed to design multiscale interface of Ga2O3@rGO. It was synthesized to achieve superior multiplicative performance (218 mAh g−1 at 5.0 A g−1) and cycling performance (428.7 mAh g−1 after 100 cycles at 100 mAh g−1). These findings suggest that the nanoscale morphology of Ga2O3 and nanographene work together to promote electron transfer, ultimately enhancing the cycling stability of the composites.