A flower-shaped manganese dioxide/carbon composite material and its preparation method and application
A technology of carbon composite materials and manganese dioxide, which is applied in the direction of secondary batteries, electrochemical generators, positive electrodes, etc., can solve the problems of unfavorable industrial production, complex composite process, and poor stability, so as to achieve full reaction and improve Surface area, anti-agglomeration effect
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Embodiment 1
[0040] This embodiment provides a flower-shaped manganese dioxide / carbon composite material, which is prepared through the following process.
[0041] Filled with 200mL 5mmol / L H 2 SO 4 Add 1g Super P to the glass bottle of the solution and ultrasonicate for 30 min to form a dispersion. Then add 200mL 0.2mol / L KMnO to the above dispersion 4 The aqueous solution was mixed evenly and reacted with magnetic stirring in an oil bath at 80°C for 2 hours. After cooling, it was filtered and washed three times with deionized water, and dried at 90°C for 24 hours to obtain a manganese dioxide / carbon composite material.
Embodiment 2
[0043] This embodiment provides a flower-shaped manganese dioxide / carbon composite material, which is prepared through the following process.
[0044] Add 1 g of acetylene black to a glass bottle containing 200 mL of 10 mmol / L HCl solution and sonicate for 30 min to form a dispersion. Then add 200mL 0.1mol / L KMnO to the above dispersion 4 The aqueous solution was mixed evenly and reacted with magnetic stirring in an oil bath at 90°C for 3 hours. After cooling, it was filtered and washed three times with deionized water, and dried at 90°C for 24 hours to obtain a manganese dioxide / carbon composite material.
Embodiment 3
[0046] This embodiment provides a flower-shaped manganese dioxide / carbon composite material, which is prepared through the following process. Add 3.2g Super P to a glass bottle filled with 200mL 10mmol / L HCl solution and sonicate for 30min to form a dispersion. Then add 200mL 0.1mol / L KMnO to the above dispersion 4 The aqueous solution was mixed evenly and reacted with magnetic stirring in an oil bath at 90°C for 3 hours. After cooling, it was filtered and washed three times with deionized water, and dried at 90°C for 24 hours to obtain a manganese dioxide / carbon composite material.
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Abstract
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