Submicron lithium manganite for positive electrode of lithium ion battery and preparation method of submicron lithium manganite

[0034] A preparation method of submicron lithium manganese oxide for positive electrode of lithium ion battery, comprising the steps of:

[0035] S1. Add cetyltrimethylammonium bromide to cyclohexane to obtain the first material; add manganese salt to the oxalic acid solution to obtain the second material; uniformly mix the first material and the second material to obtain the third material; The third material is heated until the volatilization is complete, and then solid-phase sintering is carried out to obtain the black product Mn 2 o 3 ;

[0036] S2, lithium salt, black product Mn 2 o 3 After mixing with the dispersant, grinding, drying, followed by solid phase sintering and cooling to obtain submicron lithium manganese oxide for lithium ion battery positive electrode.

[0038] A preparation method of submicron lithium manganese oxide for positive electrode of lithium ion battery, comprising the steps of:

[0039] S1. Add cetyltrimethylammonium bromide to cyclohexane to obtain the first material with a concentration of 0.03g / mL; add manganese acetate dihydrate to an oxalic acid solution with a concentration of 0.8mol / L to obtain the second material , the concentration of manganese acetate in the second material is 0.12g / mL; the first material and the second material are mixed evenly to obtain the third material; Sintered for 5h to get the black product Mn 2 o 3 ;

[0040] S2, lithium hydroxide monohydrate, black product Mn 2 o 3 Mix with ethanol or acetone, lithium hydroxide monohydrate and black product Mn 2 o 3 The molar ratio is 1.02:1, grind for 35min, dry, then raise the temperature to 450°C, keep it for 5h, raise the temperature to 750°C, keep it for 7h, the heating rate is 4.5°C / min, and cool to obtain submicron manganic acid

[0042] A preparation method of submicron lithium manganese oxide for positive electrode of lithium ion battery, comprising the steps of:

[0043] S1. Add cetyltrimethylammonium bromide to cyclohexane to obtain the first material with a concentration of 0.05g / mL; add manganese acetate dihydrate to an oxalic acid solution with a concentration of 0.5mol / L to obtain the second material , the concentration of manganese acetate in the second material is 0.13g / mL; the first material and the second material are mixed evenly to obtain the third material; Sintered for 3h to get the black product Mn 2 o 3 ;

[0044] S2, lithium hydroxide monohydrate, black product Mn 2 o 3 Mix with ethanol or acetone, lithium hydroxide monohydrate and black product Mn 2 o 3 The molar ratio is 1.08:1, grind for 25min, dry, then raise the temperature to 500°C, keep it for 3h, raise the temperature to 850°C, keep it for 5h, the heating rate is 5.2°C / min, and cool to get submicron manganic acid fo