Solid electrolyte, lithium-ion battery and method for producing lithium-ion battery
First Claim
1. A solid electrolyte provided between a cathode and an anode, said solid electrolyte comprising:
- a multi-layer structure having three layers or more;
wherein a layer nearest to the cathode side and a layer nearest to the anode side of the layers include first polymers which have a low glass transition point, do not have functional groups capable of being crosslinked and are not crosslinked and at least one layer except the layers located at positions nearest to the cathode side and the anode side of the layers includes a second polymer that has a functional group capable of being crosslinked and is crosslinked.
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Abstract
A lithium-ion battery includes a cathode and an anode capable of being doped with and dedoped from lithium and a solid electrolyte provided between the cathode and the anode. The solid electrolyte comprises a multi-layer structure having three layers or more. A layer nearest to the cathode side and a layer nearest to the anode side of the layers include first polymers which have a low glass transition point, do not have functional groups capable of being crosslinked and are not crosslinked. At least one layer except the layers located at positions nearest to the cathode side and the anode side of the layers includes a second polymer that has a functional group capable of being crosslinked and is crosslinked. Thus, the electrode utilization factor of the cathode and the anode is improved.
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Citations
13 Claims
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1. A solid electrolyte provided between a cathode and an anode, said solid electrolyte comprising:
a multi-layer structure having three layers or more;
wherein a layer nearest to the cathode side and a layer nearest to the anode side of the layers include first polymers which have a low glass transition point, do not have functional groups capable of being crosslinked and are not crosslinked and at least one layer except the layers located at positions nearest to the cathode side and the anode side of the layers includes a second polymer that has a functional group capable of being crosslinked and is crosslinked.- View Dependent Claims (2)
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3. A solid electrolyte provided between a cathode and an anode;
- said solid electrolyte comprising;
parts including polymers high in their crosslinking density in parallel with the electrode planes of the cathode and the anode, wherein the crosslinking density is inclined so as to be lowered toward the cathode and the anode from the part high in its crosslinking density. - View Dependent Claims (4, 5)
- said solid electrolyte comprising;
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6. A lithium-ion battery having a cathode and an anode capable of being doped with and dedoped from lithium and a solid electrolyte provided between the cathode and the anode, said solid electrolyte comprising:
a multi-layer structure having three layers or more;
wherein a layer nearest to the cathode side and a layer nearest to the anode side of the layers include first polymers which have a low glass transition point, do not have functional groups capable of being crosslinked and are not crosslinked and at least one layer except the layers located at positions nearest to the cathode side and the anode side of the layers includes a second polymer that has a functional group capable of being crosslinked and is crosslinked.- View Dependent Claims (7, 8)
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9. A lithium-ion battery having a cathode and an anode capable of being doped with and dedoped from lithium and a solid electrolyte provided between the cathode and the anode, said solid electrolyte comprising:
parts including polymers that have functional groups capable of being crosslinked in parallel with the electrode planes of the cathode and the anode and are crosslinked with a high crosslinking density, wherein the crosslinking density is inclined so as to be lowered toward the cathode and the anode from the part having the high crosslinking density. - View Dependent Claims (10, 11, 12)
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13. A method for producing a lithium-ion battery including a cathode and an anode capable of being doped with and dedoped from lithium and a solid electrolyte provided between the cathode and the anode, said method comprising the steps of:
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forming on the cathode and the anode first polymer layers having a low glass transition point and no functional group capable of being crosslinked and including a polymer which is not crosslinked;
forming a second polymer layer provided between the cathode and the anode so as to be opposed to the first polymer layers, having a functional group capable of being crosslinked and including a crosslinked polymer and allowing the first polymer layers respectively formed on the cathode and the anode and the second polymer layer to be opposed to each other and come into tightly contact with each other.
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Specification