Lithium-ion battery
First Claim
1. A lithium-ion battery having a wound electrode configuration comprising:
- a wound cell element comprising a positive electrode and a negative electrode, the positive electrode comprising a current collector and a first active material and the negative electrode comprising a current collector and a second active material, wherein the current collectors of the positive and negative electrodes each include a leading edge, a trailing edge, and two lateral edges;
wherein the second active material is a lithium titanate material;
wherein the first active material is configured to be doped and undoped with lithium cations during cycling of the battery;
wherein the current collector of the negative electrode comprises aluminum; and
wherein the wound cell element comprises a region where a first lateral edge of the positive electrode is provided proximate a first lateral edge of the negative electrode and the first active material near the first lateral edge of the positive electrode extends beyond the second active material near the first lateral edge of the negative electrode in an axial direction relative to the wound cell element.
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Accused Products
Abstract
A lithium-ion battery having a wound electrode configuration includes a wound cell element that includes a positive electrode and a negative electrode, the positive electrode including a current collector and a first active material and the negative electrode including a current collector and a second active material. The second active material has a potential that is greater than 0.2 volts versus a lithium reference electrode. The wound cell element includes a region where an edge of the positive electrode is provided proximate an edge of the negative electrode and the second active material near the edge of the negative electrode does not extend beyond the first active material near the edge of the positive electrode.
221 Citations
26 Claims
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1. A lithium-ion battery having a wound electrode configuration comprising:
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a wound cell element comprising a positive electrode and a negative electrode, the positive electrode comprising a current collector and a first active material and the negative electrode comprising a current collector and a second active material, wherein the current collectors of the positive and negative electrodes each include a leading edge, a trailing edge, and two lateral edges; wherein the second active material is a lithium titanate material; wherein the first active material is configured to be doped and undoped with lithium cations during cycling of the battery; wherein the current collector of the negative electrode comprises aluminum; and wherein the wound cell element comprises a region where a first lateral edge of the positive electrode is provided proximate a first lateral edge of the negative electrode and the first active material near the first lateral edge of the positive electrode extends beyond the second active material near the first lateral edge of the negative electrode in an axial direction relative to the wound cell element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A lithium-ion battery comprising:
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a wound element comprising a first electrode and a second electrode, wherein the first electrode comprises a first current collector and a first active material and the second electrode comprises a second current collector and a second active material; wherein the second active material is selected from the group consisting of TiO2, MoO2, Nb2O5, V6O13, Li6Fe2O3, and combinations thereof; wherein the second current collector comprises aluminum; wherein the first and second current collectors each include a leading edge, a trailing edge, and two lateral edges; wherein the first active material is configured to be doped and undoped with lithium cations during cycling of the battery; wherein the wound cell element comprises a region where a first lateral edge of the first electrode is provided proximate a first lateral edge of the second electrode and the first active material near the first lateral edge of the first electrode extends beyond the second active material in an axial direction relative to the wound cell element near the first lateral edge of the second electrode for at least a portion of the wound element; and wherein the first electrode is a positive electrode and the second electrode is a negative electrode. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A lithium-ion battery comprising:
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a wound cell element comprising a positive electrode and a negative electrode the positive electrode comprising a current collector and a first active material and the negative electrode comprising a current collector and a second active material, the second active material having a potential that is greater than approximately 1.0 V versus a lithium reference electrode; wherein the current collector of the negative electrode comprises aluminum; wherein the first active material is capable of being doped and undoped with lithium cations during cycling of the battery; wherein the positive electrode has a leading edge, a trailing edge, and first and second opposed lateral edges; and wherein the negative electrode has a leading edge, a trailing edge, and first and second opposed lateral edges; wherein the positive electrode and negative electrode are arranged such that the leading edges, trailing edges, and lateral edges of the positive and negative electrodes are generally aligned; and wherein the first active material extends beyond the second active material in an axial direction relative to the wound cell element along at least a portion of an edge region in the wound cell element, the edge region comprising at least one of the aligned first lateral edges and the aligned second lateral edges of the positive and negative electrodes. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification