A long cycle life high specific capacity lithium-sulfur battery cathode material and lithium-sulfur battery cathode and its preparation
A lithium-sulfur battery and cathode material technology, applied in battery electrodes, lithium batteries, non-aqueous electrolyte batteries, etc., can solve problems such as low specific capacity and poor cycle stability, achieve ultra-long cycle life, energy saving and emission reduction effects, preparation The effect of low energy consumption
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Embodiment 1
[0039] A method for preparing an ultra-long cycle life and high specific capacity lithium-sulfur battery positive electrode material and positive electrode sheet, specifically comprising the following steps:
[0040] (1) Dissolving 3g of m-aminothiophenol in 30mL of hydrochloric acid solution with a concentration of 1mol / L, stirring and dissolving at a speed of 200 rpm to obtain a mixed solution;
[0041] (2) Under the conditions of stirring (250 rpm) and 3°C water bath, slowly add 30 mL of an aqueous solution of ammonium persulfate with a concentration of 1 mol / L to the mixed solution, and the rate of addition is controlled at 1 drop / second, and the reaction is 12 Hours later, filter with suction, wash with deionized water, then place in a vacuum drying oven at 35°C to dry to constant weight, grind, pass through 500 mesh, and obtain a highly conductive polyaniline material, that is, a conductive polymer;
[0042] (3) Mix 1 mass part of conductive polymer and 6 mass parts of s...
Embodiment 2
[0052] A method for preparing an ultra-long cycle life and high specific capacity lithium-sulfur battery positive electrode material and positive electrode sheet, specifically comprising the following steps:
[0053] (1) Dissolving 5 g of o-aminothiophenol in 80 mL of hydrochloric acid solution with a concentration of 0.6 mol / L, stirring and dissolving at a speed of 200 rpm to obtain a mixed solution;
[0054] (2) Under stirring (250 rpm) and 6°C water bath conditions, slowly add 80mL of ammonium persulfate aqueous solution with a concentration of 0.5mol / L dropwise to the mixed solution, the rate of addition is controlled at 1 drop / second, and the reaction After 10 hours, filter with suction, wash with deionized water, and then place in a vacuum drying oven at 40°C to dry to constant weight, grind, pass through 500 mesh, and obtain a highly conductive polyaniline material, that is, a conductive polymer;
[0055] (3) Mix 1.2 parts by mass of conductive polymer and 6.5 parts by ...
Embodiment 3
[0059] A method for preparing an ultra-long cycle life and high specific capacity lithium-sulfur battery positive electrode material and positive electrode sheet, specifically comprising the following steps:
[0060] (1) Dissolving 5 g of o-aminothiophenol in 60 mL of hydrochloric acid solution with a concentration of 0.8 mol / L, stirring and dissolving at a speed of 200 rpm to obtain a mixed solution;
[0061] (2) Under stirring (250 rpm) and 3°C water bath conditions, slowly add 60 mL of an aqueous solution of ammonium persulfate with a concentration of 0.8 mol / L in the mixed solution, and the rate of addition is controlled at 0.5 drops / second, and the reaction After 10 hours, filter with suction, wash with deionized water, and then place in a vacuum drying oven at 40°C to dry to constant weight, grind, pass through 500 mesh, and obtain a highly conductive polyaniline material, that is, a conductive polymer;
[0062] (3) Mix 1.2 parts by mass of conductive polymer and 6 parts...
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