Graphite oxide positive electrode material for lithium ion battery and preparation method thereof and preparation method of lithium ion battery positive electrode

The invention discloses a preparation method for a graphite oxide positive electrode material for a lithium ion battery, and the method comprises the following steps: (1) dispersing graphite and sodium nitrate in concentrated sulfuric acid to obtain a mixed liquid; (2) under stirring condition, adding potassium permanganate for reaction for 1-3h, and heating up to 30-50 DEG C for reaction for 1-3H; (3) adding distilled water into the solution, and heating up to 70-100 DEG C for reaction for 15-60min; (4) when the solution temperature is reduced to 60 DEG C, adding a H2O2 solution under stirring, standing suspension, and cleaning to obtain slurry; and (5) freezing drying the slurry to obtain a graphite oxide product. The invention also discloses the graphite oxide positive electrode material for the lithium ion battery and a preparation method of a lithium ion battery positive electrode. The graphite oxide material is used for the lithium ion battery positive electrode, and has excellent electrochemical perfor