Gel polymer electrolyte and lithium secondary battery comprising the same
AssigneeLG Chem, Ltd.
InventorsKyoung Ho Ahn, Jeong Woo Oh, Chul Haeng Lee, Yi Jin Jung, Sol Ji Park
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Abstract
Provided are a gel polymer electrolyte including a polymer network, and an electrolyte solution impregnated in the polymer network, wherein the polymer network is formed by combining a first oligomer, which includes unit A derived from a monomer including at least one copolymerizable acrylate or acrylic acid, unit C including urethane, and unit E including alkylene group substituted with one or more fluorine, in a three-dimensional structure, and a lithium secondary battery including the gel polymer electrolyte.
Claims21
A gel polymer electrolyte comprising:
- a polymer network;
- and
- an electrolyte solution impregnated in the polymer network,
- wherein the polymer network is formed by combining a first oligomer represented by Formula 1 in a three-dimensional structure,
- A-[C-E]k-C-A [Formula 1]
- where k is an integer of 1 to 200,
- unit A is a unit derived from a monomer including at least one copolymerizable acrylate or acrylic acid,
- unit C is a unit represented by Formula 2a or Formula 2b,
- where R′ is at least one selected from the group consisting of a linear or non-linear alkylene group having 1 to 10 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 10 carbon atoms, a substituted or unsubstituted bicycloalkylene group having 6 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted biarylene group having 6 to 20 carbon atoms, a naphthalene group, and an anthracene group,
- and unit E includes alkylene group substituted with one or more fluorine.
A composition for a gel polymer electrolyte, the composition comprising:
- a lithium salt;
- an electrolyte solution solvent;
- a polymerization initiator;
- and
- a first oligomer represented by Formula 1, which includes unit A derived from a monomer including at least one copolymerizable acrylate or acrylic acid, unit C including urethane, and unit E including alkylene group substituted with one or more fluorine,
- A-[C-E]k-C-A [Formula 1]
- where k is an integer of 1 to 200,
- unit A is a unit derived from a monomer including at least one copolymerizable acrylate or acrylic acid,
- unit C is a unit represented by Formula 2a or Formula 2b,
- where R′ is at least one selected from the group consisting of a linear or non-linear alkylene group having 1 to 10 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 10 carbon atoms, a substituted or unsubstituted bicycloalkylene group having 6 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted biarylene group having 6 to 20 carbon atoms, a naphthalene group, and an anthracene group,
- and unit E includes alkylene group substituted with one or more fluorine.
Dependencies are inferred from the claim text.