Semi-solid polymer electrolyte, preparation method and lithium metal battery
A polymer and semi-solid technology, applied in the direction of non-aqueous electrolyte batteries, solid electrolytes, lithium batteries, etc., can solve the problem of unstable electrolyte-electrode interface, achieve stable electrolyte-electrode interface, excellent rate performance, good mechanical strength Effect
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[0039] Example 1
[0040] The invention provides a preparation method of a semi-solid polymer electrolyte, which comprises the following steps:
[0041] S1, dissolving 4,4'- dihydroxydiphenyl sulfone in a solvent, adding lithium borohydride, and reacting to obtain a first product;
[0042] S2, dissolving the first product and polybenzimidazole in N,N dimethylacetamide to prepare a casting solution, casting the casting solution on a substrate, then immersing the substrate in ethyl acetate to remove N,N dimethylacetamide, and drying to obtain a polymer electrolyte membrane for later use;
[0043] S3, dissolving acrylate monomers and initiators in electrolyte to prepare precursor solution;
[0044] S4, soaking the polymer electrolyte membrane in the precursor solution, carrying out polymerization reaction and preparing the semi-solid polymer electrolyte.
[0045] It should be noted that, in the example of this application, in S1, 10mmol of 4,4'- dihydroxydiphenyl sulfone was weighed ...
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[0056] Example 2
[0057] Same as Example 1, except that the mass ratio of polybenzimidazole (PBI) to the first product (Li-PSDB) is 1:2.
Example Embodiment
[0058] Example 3
[0059] Same as Example 1, except that the mass ratio of polybenzimidazole (PBI) to the first product (Li-PSDB) is 2:1.
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