▎ 摘　　要

NOVELTY - A tin dioxide/boron-doped graphene nano-composite material comprises 20.1-71.5 mass% tin oxide and 1.1-5.3 mass% boron-doped graphene. USE - Tin dioxide/boron-doped graphene nano-composite material for electronic devices. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing a tin dioxide/boron-doped graphene nano-composite material, which involves mixing graphene with mixed solution of water and ethanol, carrying out an ultrasound dispersion process to obtain oxidized graphite alkene, adding, stirring and dissolving boric acid and stannous chloride with the obtained oxidized graphite alkene, placing the obtained mixture in a hydrothermal kettle, and carrying out filtering, separating, washing and drying processes to obtain a tin dioxide/boron-doped graphene nano-composite material.