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US 2018/0294523 A1Published application
Peo-based graft copolymers with pendant fluorinated groups for use as electrolytes
AssigneeSeeo, Inc.
InventorsKulandaivelu Sivanandan, Jonathan C. Pistorino, Hany Basam Eitouni
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Abstract
Syntheses of graft copolymers based on PEO and fluorinated functional groups are described. Grafting of fluorinated groups reduces the Tm of PEO and also increases the miscibility of PEO with ionic liquids, so that addition of ionic liquids improves ionic conductivity even at room temperature. The disclosed copolymers containing fluorinated functionality have superior safety and are more flame retardant as compared to traditional electrolytes. Such copolymers can be used as either solid or gel electrolytes in Li batteries.
Claims13
A block copolymer electrolyte comprising:
- a first block comprising a metal salt and a graft copolymer comprising;
- a plurality of PEO molecules;
- and
- perfluoro functional groups grafted onto at least a portion of the plurality of PEO molecules;
- and
- a second block comprising a polymer that has a modulus in excess of 1×105 Pa at temperatures at and below 25° C.
3 more elements
Dependencies are inferred from the claim text.