Polymer solid electrolytes, methods of making, and electrochemical cells comprising the same

An electrochemical cell with an electrolyte comprising a crosslinked copolymer obtained by a crosslinking reaction including a first monomer selected from the group consisting of:

• and a second monomer selected from the group consisting of methacrylate, norbornyl methacrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-aminoethyl methacrylate hydrochloride, glycidyl methacrylate, 2-(diethylamino)ethyl methacrylate, wherein R1 comprises a structure selected from the group consisting of:
• wherein n is an integer between 1 and 10,000, inclusively;
• m is an integer between 1 and 5,000, inclusively;
• R2, R3, R4, R5, and R6 are each independently selected from the group consisting of hydrogen, methyl, ethyl, phenyl, benzyl, acryl, epoxy ethyl, isocyanate, cyclic carbonate, lactone, lactam, and vinyl;
• and * indicates a point of attachment.

A method of making a solid electrolyte comprising a crosslinked polymer, comprising:

• a) mixing a composition comprising one or more monomers, an electrolyte salt and a plasticizer to form a slurry;
• and
• b) curing the one or more monomers in the slurry into a crosslinked polymer, leading to a solid electrolyte comprising the crosslinked polymer with the electrolyte salt and plasticizer therein,
• wherein the one or more monomers are selected from the group consisting of:
• wherein R1 comprises a structure selected from the group consisting of:
• wherein n is an integer between 1 and 10,000, inclusively;
• m is an integer between 1 and 5,000, inclusively;
• R2, R3, R4, R5, and R6 are each independently selected from the group consisting of hydrogen, methyl, ethyl, phenyl, benzyl, acryl, epoxy ethyl, isocyanate, cyclic carbonate, lactone, lactam, and vinyl;
• and * indicates a point of attachment.