Preparation method of lithium ion solid electrolyte with high ionic conductivity at room temperature
A technology of solid electrolyte and ionic conductivity, which is applied in solid electrolyte, non-aqueous electrolyte, electrolyte immobilization/gelation, etc. It can solve the problems of low room temperature electrical performance, unfavorable practical application, and low room temperature electrical performance of solid-state batteries. Achieve the effect of promoting shuttling and solving the poor ion conductivity at room temperature
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Embodiment 1
[0033] This embodiment provides a method for preparing a lithium-ion solid-state electrolyte with high ionic conductivity at room temperature. The specific steps are as follows:
[0034] S1. Add 1-vinylimidazole and deionized water with a volume ratio of 1:2 into the reaction vessel, place it in a constant temperature water bath at 60°C, pass nitrogen gas into it, stir and heat, and then slowly add epichlorohydrin into the system, The volume ratio of epichlorohydrin to 1-vinylimidazole is 2:1; fully stir the reaction for 6 hours, add ether to precipitate after the reaction, and obtain a functionalized 1-vinylimidazole ionic liquid for use;
[0035] S2. Add branched polyethyleneimine with a mass ratio of 10% to the functionalized 1-vinylimidazole ionic liquid prepared in step S1, and place it at 60° C. for 4 hours to obtain polymer crosslinked 1-vinyl Imidazolium ionic liquid;
[0036] S3. The 1-vinylimidazole ionic liquid prepared in step S2 is dissolved in ethanol to form a ...
Embodiment 2
[0040] This embodiment provides a method for preparing a lithium-ion solid-state electrolyte with high ionic conductivity at room temperature. The specific steps are as follows:
[0041] S1. Add 1-vinylimidazole and deionized water with a volume ratio of 1:2 into the reaction vessel, place it in a constant temperature water bath at 40°C and feed it with nitrogen to stir and heat, then slowly add bromoacetic acid and bromoacetic acid dropwise into the system The volume ratio of 1-vinylimidazole and 1-vinylimidazole is 1:1; fully stir the reaction for 4 hours, add ether to precipitate after the reaction, and obtain a functionalized 1-vinylimidazole ionic liquid for use;
[0042] S2. Add polyethylenediamine ether with a mass ratio of 6% to the functionalized 1-vinylimidazole ionic liquid prepared in step S1, and place it at 60° C. for 4 hours to obtain polymer crosslinked 1-vinylimidazole ionic liquid;
[0043] S3. The 1-vinylimidazole ionic liquid prepared in step S2 is dissolv...
Embodiment 3
[0047] This embodiment provides a method for preparing a lithium-ion solid-state electrolyte with high ionic conductivity at room temperature. The specific steps are as follows:
[0048]S1. Add 1-vinylimidazole and deionized water with a volume ratio of 1:2 into the reaction vessel, place it in a constant temperature water bath at 25~60°C and pass in nitrogen gas to stir and heat, then slowly add bromoethylamine dropwise to the system , the volume ratio of bromoethylamine and 1-vinylimidazole is 2:1; fully stir the reaction for 4h, add diethyl ether for precipitation after the reaction is completed, and obtain a functionalized 1-vinylimidazole ionic liquid for use;
[0049] S2. Add polyglycidylmethacrylic acid ether with a mass ratio of 1% to the functionalized 1-vinylimidazole ionic liquid prepared in step S1, and place it at 60°C for 6 hours to obtain polymer crosslinked 1-ethylene Kimidazole ionic liquid;
[0050] S3. The 1-vinylimidazolium ionic liquid prepared in step S2...
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