Preparation method and application of cross-linked cellulose-based gel polymer electrolyte
A cellulose gel, cellulose technology, applied in the field of materials, can solve the problems of undiscovered patent publications, etc., and achieve the effects of excellent thermal stability, wide sources, and simple preparation methods
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[0029] A preparation method of cross-linked cellulose-based gel polymer electrolyte, the steps are as follows:
[0030] (1) Preparation of cellulose solution: mix cellulose with alkali / urea solution, the mass final concentration of described cellulose is 3~7.5wt%, freeze 2~10 hours at-30 ℃~-10 ℃, then in Stir and thaw at room temperature, and freeze-thaw several times in this way to obtain a transparent and uniform cellulose alkaline solution;
[0031] (2) Preparation of cellulose gel polymer film: adding N,N-methylenebisacrylamide to the solution of step (1), the final concentration of which is 2-8 wt%, stirring evenly and standing to solidify, Purify the obtained gel with deionized water, and obtain a transparent, smooth and flexible cellulose gel polymer film after drying;
[0032] (3) Preparation of the cellulose gel polymer electrolyte: soak the cellulose gel polymer film in the electrolyte solution to obtain the cross-linked cellulose gel polymer electrolyte.
[0033] ...
Embodiment 1
[0051] A preparation method of cross-linked cellulose-based gel polymer electrolyte, the steps are as follows:
[0052] (1) Preparation of cellulose solution: 5g particle size is that microcrystalline cellulose is dissolved in 95g sodium hydroxide / urea aqueous solution (sodium hydroxide: 7wt%, urea: 12wt%) mixes, cryogenic freezing 3 hours, then at room temperature Stirring and thawing for 1 hour, such freezing-thawing 3 times, a transparent and uniform 5wt% cellulose alkaline solution was obtained.
[0053] (2) Preparation of cellulose gel polymer film: N, N-methylenebisacrylamide is added to the solution of step (1), and the mass fraction of N, N-methylenebisacrylamide is 5wt% , stirred evenly and left to solidify, the obtained gel was purified with deionized water, and a transparent, smooth and flexible cellulose gel polymer film was obtained after vacuum drying.
[0054] (3) Preparation of the cellulose gel polymer electrolyte: soak the cellulose gel polymer film in the l...
Embodiment 2
[0060] A preparation method of cross-linked cellulose-based gel polymer electrolyte, the steps are as follows:
[0061] (1) Preparation of cellulose solution: dissolving 6g of microcrystalline cellulose in 94g of lithium hydroxide / urea aqueous solution (lithium hydroxide: 5wt%, urea: 13wt%) mixed with a particle size of 6g, freezing at low temperature for 4 hours, and then Stirring and thawing for 0.5 hour, such freezing-thawing three times, a transparent and uniform 6wt% cellulose alkaline solution was obtained.
[0062] (2) Preparation of cellulose gel polymer film: N, N-methylenebisacrylamide is added to the solution of step (1), and the mass fraction of N, N-methylenebisacrylamide is 2.5wt %, stir evenly and leave to solidify, use deionized water to purify the obtained gel, and obtain a transparent, smooth and flexible cellulose gel polymer film after direct drying.
[0063] (3) Preparation of cellulose gel polymer electrolyte: Soak the cellulose gel polymer film in the b...
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