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US 8,940,441 B2Granted
Anode and battery
AssigneeSony Corporation
InventorsTakakazu Hirose, Kenichi Kawase, Isamu Konishiike, Masayuki Iwama, Koichi Matsumoto
Life of this patent
Estimating the term…
Abstract
An anode capable of relaxing the stress due to expansion and shrinkage and a battery using the anode are provided. In the anode, an anode active material layer containing at least one of silicon and tin as an element is provided on both faces of a strip-shaped anode current collector. In the anode current collector and the anode active material layer, at least one penetrating portion that is cut out or slit to penetrate the anode current collector and the anode active material layer is formed to extend to include a longitudinal component of the anode current collector.
Claims19
An anode in which an anode active material layer containing at least one of silicon (Si) and tin (Sn) as an element is provided on both faces of a strip-shaped anode current collector,
- wherein,
- the anode current collector and the anode active material layer include a plurality of penetrating portions effective to provide a capacity retention ratio of 79% or greater, and a thickness increasing rate of 23% or less for a battery, each penetrating portion being a cut out or a slit that penetrates the anode current collector and the anode active material layer and being formed such that a length of the penetrating portion extends primarily along a longitudinal component of the anode current collector,
- a length of a longitudinal component of each penetrating portion is 25% or more of a length of the anode active material layer,
- each penetrating portion is spaced from ends of the anode active material layer, and
- at least a portion of the anode current collector that contacts the anode active material layer comprises a metal element alloyed with the anode active material layer.
2 more elements
An anode in which an anode active material layer containing at least one of silicon (Si) and tin (Sn) as an element is provided on both faces of a strip-shaped anode current collector,
- wherein,
- the anode current collector and the anode active material layer include a plurality of penetrating portions effective to provide a capacity retention ratio of 79% or greater, and a thickness increasing rate of 23% or less for a battery, each penetrating portion being a cut out or slit that penetrates the anode current collector and the anode active material layer and being formed such that a length of each penetrating portion extends primarily along a longitudinal component of the anode current collector,
- a length of a longitudinal component of at least one penetrating portion is 50% or more of a length of the anode active material layer,
- each penetrating portion is spaced from ends of the anode active material layer, and
- at least a portion of the anode current collector that contacts the anode active material layer comprises a metal element alloyed with the anode active material layer.
2 more elements
An anode in which an anode active material layer containing at least one of silicon (Si) and tin (Sn) as an element is provided on both faces of a strip-shaped anode current collector,
- wherein,
- the anode current collector and the anode active material layer include a plurality of penetrating portions effective to provide a capacity retention ratio of 79% or greater, and a thickness increasing rate of 23% or less for a battery, each penetrating portion being a cut out or a slit that penetrates the anode current collector and the anode active material layer and being formed such that a length of each penetrating portion extends primarily along a longitudinal component of the anode current collector,
- a length of a longitudinal component of at least one penetrating portion is 70% or more of a length of the anode active material layer,
- each penetrating portion is spaced from ends of the anode active material layer, and
- at least a portion of the anode current collector that contacts the anode active material layer comprises a metal element alloyed with the anode active material layer.
2 more elements
An anode in which an anode active material layer containing at least one of silicon (Si) and tin (Sn) as an element is provided on both faces of a strip-shaped anode current collector,
- wherein,
- the anode current collector and the anode active material layer include a plurality of penetrating portions effective to provide a capacity retention ratio of 79% or greater, and a thickness increasing rate of 23% or less for a battery, each penetrating portion being a cut out or a slit that penetrates the anode current collector and the anode active material layer and being formed such that a length of each penetrating portion extends primarily along a longitudinal component of the anode current collector,
- a width of each penetrating portion is from 0.1 mm to 5 mm,
- each penetrating portion is spaced from ends of the anode active material layer, and
- at least a portion of the anode current collector that contacts the anode active material layer comprises a metal element alloyed with the anode active material layer.
2 more elements
A battery comprising:
- a cathode;
- an anode;
- and
- an electrolyte,
- wherein,
- the anode has a strip-shaped anode current collector and an anode active material layer that is provided on both faces of the anode current collector and contains at least one of silicon (Si) and tin (Sn) as an element,
- the anode current collector and the anode active material layer include a plurality of penetrating portions effective to provide a capacity retention ratio of 79% or greater, and a thickness increasing rate of 23% or less for the battery, each penetrating portion being a cut out or a slit that penetrates the anode current collector and the anode active material layer and being formed such that a length of each penetrating portion extends primarily along a longitudinal component of the anode current collector,
- the length of the longitudinal component of at least one penetrating portion is 25% or more of a length of the anode active material layer,
- each penetrating portion is spaced from ends of the anode active material layer, and
- at least a portion of the anode current collector that contacts the anode active material layer comprises a metal element alloyed with the anode active material layer.
7 more elements
A battery comprising:
- a cathode;
- an anode;
- and
- an electrolyte,
- wherein,
- the anode has a strip-shaped anode current collector and an anode active material layer that is provided on both faces of the anode current collector and contains at least one of silicon (Si) and tin (Sn) as an element,
- the anode current collector and the anode active material layer include a plurality of penetrating portions effective to provide a capacity retention ratio of 79% or greater, and a thickness increasing rate of 23% or less for the battery, each penetrating portion being a cut out or a slit that penetrates the anode current collector and the anode active material layer and being formed such that a length of each penetrating portion extends primarily along a longitudinal component of the anode current collector,
- a length of a longitudinal component of at least one penetrating portion is 50% or more of a length of the anode active material layer,
- each penetrating portion is spaced from ends of the anode active material layer, and
- at least a portion of the anode current collector that contacts the anode active material layer comprises a metal element alloyed with the anode active material layer.
7 more elements
A battery comprising:
- a cathode;
- an anode;
- and
- an electrolyte,
- wherein,
- the anode has a strip-shaped anode current collector and an anode active material layer that is provided on both faces of the anode current collector and contains at least one of silicon (Si) and tin (Sn) as an element,
- the anode current collector and the anode active material layer include a plurality of penetrating portions effective to provide a capacity retention ratio of 79% or greater, and a thickness increasing rate of 23% or less for the battery, each penetrating portion being a cut out or a slit to penetrate the anode current collector and the anode active material layer and being formed such that a length of each penetrating portion extends primarily along a longitudinal component of the anode current collector,
- a length of a longitudinal component of at least one penetrating portion is 70% or more of a length of the anode active material layer,
- each penetrating portion is spaced from ends of the anode active material layer, and
- at least a portion of the anode current collector that contacts the anode active material layer comprises a metal element alloyed with the anode active material layer.
7 more elements
A battery comprising:
- a cathode;
- an anode;
- and
- an electrolyte,
- wherein,
- the anode has a strip-shaped anode current collector and an anode active material layer that is provided on both faces of the anode current collector and contains at least one of silicon (Si) and tin (Sn) as an element,
- the anode current collector and the anode active material layer include a plurality of penetrating portions effective to provide a capacity retention ratio of 79% or greater, and a thickness increasing rate of 23% or less for the battery, each penetrating portion being a cut out or a slit that penetrates the anode current collector and the anode active material layer and being formed such that a length of each penetrating portion extends primarily along a longitudinal component of the anode current collector,
- a width of each penetrating portion is from 0.1 mm to 5 mm,
- each penetrating portion is spaced from ends of the anode active material layer, and
- at least a portion of the anode current collector that contacts the anode active material layer comprises a metal element alloyed with the anode active material layer.
7 more elements
Dependencies are inferred from the claim text.