In-situ polymerized polymer electrolyte for lithium ion batteries
AssigneeEvonik Operations GmbH
InventorsShasha Su, Jinhua Jiang, Jing Feng, Hongping Li, Huichao Lu, Zhixin Xu, Jun Yang
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Abstract
Monomers for preparing a polymer electrolyte precursor composition capable to form an in-situ polymerized polymer electrolyte, which comprise, consist essentially of, or consist of A1) a first monomer and A2) a second monomer. A polymer electrolyte precursor raw material composition, a polymer electrolyte precursor composition capable to form a polymer electrolyte comprising the monomers, a polymer electrolyte and an electrochemical device are also provided.
Claims21
Monomers for preparing a polymer electrolyte precursor composition capable to form an in-situ polymerized polymer electrolyte, which consists of:
- A1) a first monomer represented by formula (I);
- wherein R represents H, F, methyl or ethyl;
- and
- A2) a second monomer, represented by formula (II);
- wherein R represents methyl, —CH2OH, ethyl, or —CH2CH2OH;
- a, b, c each independently represents 0, 1, 2 or 3, and a+b+c≥2;
- wherein the mass ratio of the first monomer and the second monomer is 20:0.5-20:10.
A polymer electrolyte precursor composition capable to form a polymer electrolyte, consisting of:
- A) monomers consisting of vinylene carbonate and trimethylolpropane ethoxylate triacrylate;
- B) a free radical initiator, with an amount of 0.1-3 wt. % based on the total weight of the vinylene carbonate and trimethylolpropane ethoxylate triacrylate;
- C) lithium bis(trifluoromethanesulfonyl) imide;
- and
- D) ethylene carbonate/dimethyl carbonate;
- wherein the amount of the vinylene carbonate and trimethylolpropane ethoxylate triacrylate is 25-75 wt. % based on the total weight of the polymer electrolyte precursor composition;
- and the mass ratio of vinylene carbonate and trimethylolpropane ethoxylate triacrylate is around 20:2-20:5.
Dependencies are inferred from the claim text.