Electrode and secondary battery including same
AssigneeSamsung SDI Co., Ltd.
InventorJongwan KIM
Life of this patent
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Abstract
An electrode includes a current collector, a first active material layer on a first surface of the current collector, and a second active material layer on a second surface of the current collector, the second surface being opposite the first surface, wherein at least one of the first active material layer and the second active material layer includes a first pattern portion and a second pattern portion, which are alternately arranged in a longitudinal direction of the current collector, wherein the second pattern portion includes an active material with a higher swelling rate during charging than an active material in the first pattern portion, and wherein the second pattern portion is thinner than the first pattern portion.
Claims20
An electrode, comprising:
- a current collector;
- a first active material layer on a first surface of the current collector;
- and
- a second active material layer on a second surface of the current collector, the second surface being opposite the first surface,
- wherein at least one of the first active material layer and the second active material layer includes a first pattern portion and a second pattern portion, which are alternately arranged in a longitudinal direction of the current collector,
- wherein the second pattern portion includes an active material with a higher swelling rate during charging than an active material in the first pattern portion, and
- wherein the second pattern portion is thinner than the first pattern portion.
A secondary battery, comprising:
- an electrode assembly including a first electrode, a separator, and a second electrode;
- a case accommodating the electrode assembly and electrically connected to the second electrode;
- and
- a cap assembly closing an opening of the case and electrically connected to the first electrode,
- wherein the second electrode includes:
- a current collector;
- a first active material layer on a first surface of the current collector;
- and
- a second active material layer on a second surface opposite to the first surface of the current collector,
- wherein at least one of the first active material layer and the second active material layer includes a first pattern portion and a second pattern portion alternately arranged in a longitudinal direction of the current collector,
- wherein the second pattern portion includes an active material with a higher swelling rate during charging than an active material in the first pattern portion, and
- wherein the second pattern portion is thinner than the first pattern portion.
Dependencies are inferred from the claim text.