▎ 摘　　要

NOVELTY - Preparing bubble film-like graphene-coated metal phosphide electrode material involves adding 1 mmol metal salt to 10-100 mL deionized water, dissolving completely the metal salt in deionized water to obtain metal salt solution, adding 15 g coordinated organic matter to 10-100 mL deionized water, dissolving completely the coordinated organic matter in deionized water to obtain coordinated organic matter solution, adding slowly the coordination organic solution to the metal salt solution USE - Method for preparing bubble film-like graphene-coated metal phosphide electrode material. ADVANTAGE - The method has effectively improves the utilization rate of active material, the high conductivity of graphene promotes the transmission of electron-sodium ion, and maintain good stability after long-term cycling, the hollow structure of the metal phosphide can reduce the volume effect in the process of releasing sodium ion, so as to achieving excellent sodium storage performance. DETAILED DESCRIPTION - Preparing bubble film-like graphene-coated metal phosphide electrode material involves adding 1 mmol metal salt to 10-100 mL deionized water, dissolving completely the metal salt in deionized water to obtain metal salt solution, adding 15 g coordinated organic matter to 10-100 mL deionized water, dissolving completely the coordinated organic matter in deionized water to obtain coordinated organic matter solution, adding slowly the coordination organic solution to the metal salt solution, stirring magnetically at a temperature of 10-40degrees Celsius, mixing completely to obtain a precursor solution, keeping the precursor solution at a temperature of 60-120degrees Celsius, evaporating completely water to obtain complex powder, putting the obtained complex powder in a tube furnace, evacuating, ventilating in argon or nitrogen, raising the temperature to 300-800degrees Celsius, keeping the temperature for 1-4 hours, cooling to room temperature naturally to obtain the bubble film-like graphene-coated metal particle material, taking the bubble film-like graphene-coated metal particle material and the phosphorus source with specific mass ratio of 1:0.1-5, respectively, mixing uniformly, putting in tube furnace, evacuating, passing in a mixture of hydrogen and argon, heating up to 200-600degrees Celsius, keeping for 1-4 hours, and cooling naturally to room temperature to obtain bubble film-like graphene-coated metal phosphide composite electrode material.