Surface modified porous carbon structural carbon fiber/sulfur composite cathode material and preparation method thereof
A composite cathode material and surface modification technology, applied in structural parts, battery electrodes, non-aqueous electrolyte battery electrodes, etc., can solve the problems of small specific surface area, uneven sulfur distribution, poor cycle performance, etc., to increase specific surface area, improve Cycle performance, effect of increasing sulfur loading
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Embodiment 1
[0032] Add 1.5g of hollow carbon fiber into the organic solvent, isolate the air and sonicate for 0.5h so that the carbon fiber is fully dispersed in 40mL of organic solvent dimethylformamide (DMF), and 1.046g of Zn(NO 3 ) 2 4H 2 O and 0.222g of terephthalic acid organic ligands were added to the carbon fiber dispersion, and the ultrasonic treatment was continued for 0.5h. After the precursor solution was mixed evenly, the precursor solution was transferred to a polytetrafluoroethylene-lined reactor; With a heating rate of 2°C / min, the temperature was heated from room temperature to 110°C and kept for 8 hours; after the solution was cooled to room temperature, the crystallized product was washed with an organic solvent, centrifuged, filtered, and dried to obtain metal-organic framework-coated carbon fibers composite material. A certain amount of metal-organic framework-coated carbon fibers was transferred to a tube furnace, and under the protection of inert gas nitrogen, the...
Embodiment 2
[0036] Add 4g of solid carbon fiber into the organic solvent, and treat it sonically for 0.5h without air so that the carbon fiber is fully dispersed in 40mL of organic solvent dimethylformamide (DMF), and 1.668g of Zn(NO 3 ) 2 ·6H 2 O and 0.357g of 2,5-dihydroxyterephthalic acid organic ligand were added to the carbon fiber dispersion, and the ultrasonic treatment was continued for 0.5h. After the precursor solution was mixed evenly, the precursor solution was transferred to the Teflon-lined In a reaction kettle; at a heating rate of 2°C / min, heat the temperature from room temperature to 150°C and keep it for 8 hours; after the solution is cooled to room temperature, wash the crystals with an organic solvent, centrifuge, filter, and dry to obtain metal Organic frame clad in carbon fiber composite. A certain amount of metal-organic framework-coated carbon fibers was transferred to a tube furnace, and under the protection of inert gas nitrogen, the temperature was raised from...
Embodiment 3
[0038] Add 1.5g of solid carbon fiber to the organic solvent, isolate the air and sonicate for 0.5h so that the carbon fiber is fully dispersed in 40mL of organic solvent N,N'-diethylformamide (DEF), and 1.668g of Zn(NO 3 ) 2 ·6H 2 O and 0.357g of 2,5-dihydroxyterephthalic acid organic ligand were added to the carbon fiber dispersion, and the ultrasonic treatment was continued for 0.5h. After the precursor solution was mixed evenly, the precursor solution was transferred to the polytetrafluoroethylene-lined In a reaction kettle; at a heating rate of 2°C / min, heat the temperature from room temperature to 200°C and keep it for 8 hours; after the solution is cooled to room temperature, wash the crystals with an organic solvent, centrifuge, filter, and dry to obtain metal Organic frame clad in carbon fiber composite. A certain amount of metal-organic framework-coated carbon fibers was transferred to a tube furnace, and under the protection of inert gas nitrogen, the temperature ...
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