A kind of preparation method of cattail velvet fiber lithium-ion battery diaphragm
A cattail velvet fiber and lithium-ion battery technology, applied in the field of electrochemistry, can solve the problems of low porosity of the diaphragm, complicated preparation process, and low mechanical strength, and achieve the effects of improved mechanical properties, simple process flow, and low equipment requirements
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[0017] A kind of preparation method of cattail velvet fiber lithium-ion battery diaphragm, described preparation method is carried out according to the following steps:
[0018] A. Cattail velvet fiber pretreatment
[0019] At room temperature, put 2g of cattail velvet fibers in a mixed solution of deionized water and ethanol with a mass ratio of 1:1, wash three times to remove impurities, and then dry at 80°C for 6h; take out the dried cattail velvet fibers and place In the solution prepared by mixing 1g of chlorine oxysalt and 100ml of deionized water, use acetic acid to adjust the pH value of the solution to 4.5, and then stir at 80°C for 1h; after the stirring, the collected cattail fibers, Wash three times in a mixed solution of deionized water and ethanol with a mass ratio of 1:1, and then dry at 80°C for 4 hours to obtain pretreated cattail velvet fibers.
[0020] B. Cattail velvet fiber oxidation treatment
[0021] Mix 0.016~0.048g of 2,2,6,6-tetramethylpiperidine-1-...
Embodiment 1
[0030] A. Cattail velvet fiber pretreatment
[0031] At room temperature, put 2g of cattail velvet fibers in a mixed solution of deionized water and ethanol with a mass ratio of 1:1, wash three times to remove impurities, and then dry at 80°C for 6 hours; take out the dried cattail velvet fibers and place them in In the solution prepared by mixing 1g of chlorine oxysalt and 100ml of deionized water, use acetic acid to adjust the pH value of the solution to 4.5, and then stir at 80°C for 1h; Wash three times in a mixed solution of deionized water and ethanol with a mass ratio of 1:1, and then dry at 80°C for 4 hours to obtain pretreated cattail velvet fibers.
[0032] B. Cattail velvet fiber oxidation treatment
[0033] Mix 0.016g of 2,2,6,6-tetramethylpiperidine-1-oxyl radical with 0.1g of NaBr into 100ml of deionized water, stir until completely dissolved, and mix with the pretreated cattail velvet in step A Mix the fibers, slowly add 8ml of 0.6mol / L NaClO solution, use NaO...
Embodiment 2
[0038] A. Cattail velvet fiber pretreatment
[0039] At room temperature, put 2g of cattail velvet fibers in a mixed solution of deionized water and ethanol with a mass ratio of 1:1, wash three times to remove impurities, and then dry at 80°C for 6 hours; take out the dried cattail velvet fibers and place them in In the solution prepared by mixing 1g of chlorine oxysalt and 100ml of deionized water, use acetic acid to adjust the pH value of the solution to 4.5, and then stir at 80°C for 1h; Wash three times in a mixed solution of deionized water and ethanol with a mass ratio of 1:1, and then dry at 80°C for 4 hours to obtain pretreated cattail velvet fibers.
[0040] B. Cattail velvet fiber oxidation treatment
[0041]Mix 0.032g of 2,2,6,6-tetramethylpiperidine-1-oxyl radical with 0.2g of NaBr into 100ml of deionized water, stir until completely dissolved, and mix with the pretreated cattail velvet in step A Mix the fibers, slowly add 8ml of 0.6mol / L NaClO solution, use NaOH...
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