Block copolymer electrolytes containing polymeric additives

An electrolyte material comprising:

• a first phase comprising a plurality of first polymers and a salt, the first phase forming an ionically-conductive domain;
• and
• a second phase comprising a plurality of second polymers and third polymers, the second phase forming a structural domain adjacent to the ionically-conductive domain;
• wherein at least some of the first polymers are covalently bonded to at least some of the second polymers to form first block copolymers;
• wherein the second polymers and the third polymers are each selected independently from the group consisting of polystyrene, hydrogenated polystyrene, polymethacrylate, poly (methyl methacrylate), polyvinylpyridine, polyvinylcyclohexane, polyimide, polyamide, polypropylene, poly (2,6-dimethyl-1,4-phenylene oxide) (PXE), polyolefins, poly (t-butyl vinyl ether), poly (cyclohexyl methacrylate), poly (cyclohexyl vinyl ether), poly (t-butyl vinyl ether), polyethylene, and polyvinylidene fluoride;
• and
• wherein one or both of the second polymers and the third polymers further comprises a first end group, and each first end group is selected independently from the group consisting of methylacrylate, methyl (methacrylate), cyclic carbonate, and dimethylcarbmoyl.