Preparation method and application method of a lithium-sulfur battery positive electrode material
A positive electrode material, lithium-sulfur battery technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of poor safety performance, large specific gravity, low capacity, etc., and achieve the effect of improving performance, improving utilization rate, and improving electrical conductivity
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Embodiment 1
[0032] Add a total of 80mL of concentrated sulfuric acid and phosphoric acid with a volume ratio of 9:1 into the beaker, put the beaker into an ice-water bath and stir to obtain a mixed acid. Take 1.2g of natural graphite or artificial graphite into the beaker, stir for 10min, and place it in Add 5g of potassium permanganate powder gradually in a constant temperature water bath at about 35°C. After reacting for 2 hours, add 10 mL of deionized water dropwise, red smoke is produced, and the solution is brown-gray viscous, continue to control the temperature at 95°C and continue the reaction for 30 minutes, then add a large amount of deionized water to terminate the reaction, and add 0.5 mL of hydrogen peroxide at the same time, Get golden yellow graphite oxide, filter while hot after the reaction, wash with 1mol / L dilute hydrochloric acid to remove SO 4 2- , to obtain an acidic graphite oxide suspension, and then wash the acidic graphite oxide to weak acidity with distilled wat...
Embodiment 2
[0034] Add a total of 80mL of concentrated sulfuric acid and phosphoric acid with a volume ratio of 9:1 into the beaker, put the beaker into an ice-water bath and stir to obtain a mixed acid. Take 1.2g of natural graphite or artificial graphite into the beaker, stir for 10min, and place it in Add 4g of potassium permanganate powder gradually in a constant temperature water bath at about 35°C. After reacting for 2 hours, add 10 mL of deionized water dropwise, red smoke is produced, and the solution is brown-gray viscous, continue to control the temperature at 95 °C and continue the reaction for 30 minutes, then add a large amount of deionized water to terminate the reaction, and add 2 mL of hydrogen peroxide at the same time to obtain Golden yellow graphite oxide, filter while hot after the reaction, wash with 1mol / L dilute hydrochloric acid to remove SO 4 2- , to obtain an acidic graphite oxide suspension, and then wash the acidic graphite oxide to weak acidity with distilled...
Embodiment 3
[0036] Add a total of 80mL of concentrated sulfuric acid and phosphoric acid with a volume ratio of 9:1 into the beaker, put the beaker into an ice-water bath and stir to obtain a mixed acid. Take 1.2g of natural graphite or artificial graphite into the beaker, stir for 10min, and place it in Add 6g of potassium permanganate powder gradually into a constant temperature water bath at about 35°C. After reacting for 2 hours, add 10 mL of deionized water dropwise, red smoke is generated, and the solution is brown-gray viscous. Continue to control the temperature at 95°C and continue the reaction for 30 minutes, then add a large amount of deionized water to terminate the reaction, and add 4 mL of hydrogen peroxide at the same time to obtain Golden yellow graphite oxide, filter while hot after the reaction, wash with 1mol / L dilute hydrochloric acid to remove SO 42- , to obtain an acidic graphite oxide suspension, and then wash the acidic graphite oxide to weak acidity with distilled...
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