Preparation method of lithium battery diaphragm material
A technology for lithium battery separators and preparation steps, which is applied in the field of preparation of lithium battery separator materials, and can solve the problems that the performance indicators cannot be considered as a whole, reduce the strength and impact resistance of the separator, and reduce the safety of lithium batteries, etc., and achieve non-toxic production process No pollution, excellent wettability, and the effect of improving electrochemical performance
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example 1
[0022]Weigh 200g of cotton linters, spray 10mL of biogas digester supernatant on the surface of the linters through a watering can, and then transfer the linters into a constant temperature and humidity incubator. Cultivate at constant humidity for 3 days, wash the linters with 8% hydrogen peroxide for 4 times, then transfer the linters to an oven at 105°C, and dry them to constant weight to obtain pretreated linters; weigh 160g of the above obtained Pretreated cotton linters, 8g sodium dodecylbenzene sulfonate, added to a beaker filled with 200mL mass concentration of 15% sodium hydroxide solution, then transferred the beaker to a high-pressure steamer filled with 1L water, at temperature Under the conditions of 150°C and 0.6MPa pressure, cook for 7 hours, remove the beaker, and let it stand still; after the material in the beaker is naturally cooled to room temperature, add sulfuric acid with a mass concentration of 6% dropwise, adjust the pH to 6.8, and then add 0.2g cellula...
example 2
[0026] Weigh 260g of cotton linters, spray 12mL of biogas digester supernatant on the surface of the linters through a watering can, and then transfer the linters into a constant temperature and humidity incubator. Cultivate at constant humidity for 4 days, wash the linters with 10% hydrogen peroxide for 5 times, then transfer the linters to an oven at 108°C, and dry them to constant weight to obtain pretreated linters; weigh 170g of the above obtained Pretreatment cotton linters, 10g sodium dodecylbenzene sulfonate, add 260mL mass concentration and be in the beaker that is 18% sodium hydroxide solution, then transfer the beaker to fill 1.5L clear water in the autoclave, in The temperature is 156°C and the pressure is 0.7MPa, cook for 8 hours, remove the beaker, and let it stand; when the material in the beaker is naturally cooled to room temperature, add sulfuric acid with a mass concentration of 7% dropwise, adjust the pH to 7, and then add 0.3g of cellulose Enzyme, then tra...
example 3
[0030] Weigh 300g of cotton linters, spray 15mL of biogas digester supernatant on the surface of the linters through a watering can, and then transfer the linters into a constant temperature and humidity incubator, under the conditions of relative humidity of 50% and temperature of 42°C, constant temperature Cultivate at constant humidity for 5 days, wash the linters with 12% hydrogen peroxide for 6 times, then transfer the linters to an oven at 110°C, and dry them to constant weight to obtain pretreated linters; weigh 180g of the above obtained Pretreated cotton linters, 12g sodium dodecylbenzene sulfonate, add 300mL of mass concentration to a beaker of 20% sodium hydroxide solution, and then transfer the beaker to a high-pressure steamer filled with 2L of clear water. Under the conditions of 158°C and 0.8MPa pressure, cook for 9 hours, remove the beaker, and let it stand still; after the material in the beaker is naturally cooled to room temperature, add sulfuric acid with a ...
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