▎ 摘　　要

NOVELTY - Preparing graphene modified electrode material, involves (a) mixing metal chromium powder and graphene in a mass ratio of (900-1100):(1-3) to obtain 9-12 g mixture, adding 15-30 ml deionized water to the mixture, and dispersing to obtain a suspension, (b) adding 8-15 ml 20-30% aqueous ammonia and 50-100 ml deionized water to the suspension to obtain a preliminary mixed solution, (c) mixing salt solution mixture of chromium salt and iron salt, and mixing the salt solution mixture with the preliminary suspension in proportion (1-5):(10-50) to obtain a total mixture, (d) washing the total mixture with deionized water for multiple times, suction filtering for many times, adding 100-600 ml anhydrous ethanol to the total mixture, and stirring to obtain a dispersion, (e) placing the dispersion in a glass rotary evaporator, rotating while heating until the ethanol and water, and drying to obtain powder, and (f) calcining the powder, grinding, cooling and graphene doping. USE - The method is useful for preparing graphene modified electrode material for steel liquid low-oxygen fixed-oxygen battery (claimed). ADVANTAGE - The method solves the problem of the traditional electrode material that does not conduct electricity smoothly during the electrode reaction process, and ensures the accuracy, stability and sensitivity of the hypoxic oxygen-fixing probe, and meets the on-site demand for hypoxic oxygen-fixing probes.