Polymer electrolyte, rechargeable lithium battery and method of preparing rechargeable lithium battery
AssigneeSamsung SDI Co., Ltd.
InventorsTakitaro Yamaguchi, Ryuichi Shimizu, Cheol-Soo Jung
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Abstract
A polymer electrolyte includes an organic electrolyte solution and a composite fiber immersed with the organic electrolyte solution. The organic electrolyte includes lithium salts dissolved in a non-aqueous solvent. The composite fiber includes a fiber that is gelable, and a fiber that is ungelable by the non-aqueous solvent. The gelable fiber has at least two acidic groups and at least two gelable functional groups. The gelable fiber is cross-linked by a bivalent or multivalent basic cross-linking agent, thereby cross-linking the composite fiber.
Claims27
A polymer electrolyte for a rechargeable lithium battery, comprising:
- an organic electrolyte solution having a lithium salt dissolved in a non-aqueous solvent;
- and
- a composite fiber immersed with the organic electrolyte solution, the composite fiber comprising:
- a gelable fiber that is gelated by the non-aqueous solvent, is cross-linked by a bivalent or multivalent basic cross-linking agent, and is gelated by the organic electrolyte solution, and
- an ungelable fiber that is not gelated by the non-aqueous solvent, wherein the gelable fiber has at least two acidic groups and at least two gelable functional groups.
A polymer electrolyte comprising:
- an organic electrolyte solution having a lithium salt dissolved in an non-aqueous solvent, and
- a composite fiber immersed with the organic electrolyte solution, the composite fiber comprising:
- a gelable fiber that is gelated by the non-aqueous solvent and is gelated by the organic electrolyte solution, and
- an ungelable fiber that is not gelated by the non-aqueous solvent, wherein the gelable fiber comprises at least two basic functional groups and at least two gelable functional groups, and
- the composite fiber is cross-linked by a bivalent or multivalent acidic cross-linking agent.
A rechargeable lithium battery comprising:
- a positive electrode that intercalates and deintercalates lithium ions;
- a negative electrode that intercalates and deintercalates lithium ions;
- a polymer electrolyte, disposed between the positive and negative electrodes, the polymer electrolyte comprising
- an organic electrolyte solution having a lithium salt dissolved in a non-aqueous solvent, and
- a composite fiber immersed with the organic electrolyte solution, the composite fiber comprising
- a gelable fiber that includes at least two acidic groups and at least two gelable functional groups, is gelated by the non-aqueous solvent, is cross-linked by a bivalent or multivalent basic cross-linking agent, and is gelated by the organic electrolyte solution, and
- an ungelable fiber that is not gelated by the non-aqueous solvent.
A method of manufacturing a rechargeable lithium battery, comprising:
- preparing a base polymer by making a composite fiber including a gelable fiber that has at least two acidic groups and at least two gelable functional groups, and is capable of being gelated by a non-aqueous solvent, and an ungelable fiber that is not capable of being gelated by a non-aqueous solvent;
- preparing a gelating liquid by mixing a bivalent or multivalent basic cross-linking agent that cross-links the gelable fiber with an organic electrolyte solution that includes lithium salts dissolved in a non-aqueous solvent;
- inserting into a battery case a positive electrode and a negative electrode that are intercalate and deintercalate lithium ions, with the base polymer, the base polymer being disposed between the positive and negative electrodes;
- and
- adding the gelating liquid into the battery case.
A method of manufacturing a rechargeable lithium battery comprising:
- preparing a base polymer by making a composite fiber with a gelable fiber that has at least two acidic groups and at least two gelable functional groups, and is gelated by a non-aqueous solvent, and an ungelable fiber that is not gelated by a non-aqueous solvent to prepare a base polymer;
- preparing a gelating liquid by mixing a bivalent or multivalent acidic cross-linking agent that cross-links the gelable fiber, with an organic electrolyte solution that includes lithium salts dissolved in a non-aqueous solvent;
- inserting into a battery case the positive electrode and the negative electrode that intercalate and deintercalate lithium ions, and the base polymer, the base polymer being disposed between the positive and negative electrodes and adding the gelating liquid into the battery case.
Dependencies are inferred from the claim text.