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US 8,507,133 B2Granted
Anode active material, anode, and lithium secondary battery
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKeiichi Yokouchi
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Abstract
The principal object of the present invention is to provide an anode active material suitable for rapid charging. The present invention provides an anode active material comprising a metallic part which comprises Sn or Si and has a film thickness of 0.05 μm or less, and thereby solving the problem.
Claims9
An anode active material comprising a metallic part which comprises Sn or Si and has a film thickness of 0.05 μm or less,
- wherein the anode active material is a flaky material comprising the metallic part and a carbon coat laminated therein,
- a film thickness of the carbon coat is in the range of 0.01 μm to 1.0 μm,
- the anode active material is a 3-layer structure having a metallic part, a carbon coat and a metallic part laminated in that order, or a 3-layer structure having a carbon coat, a metallic part and a carbon coat laminated in that order, and
- the metallic part in the 3-layer structure is a single layer.
1 more element
A method for manufacturing an anode active material, comprising steps of:
- forming a metal-carbon laminate on a substrate by carrying out a step of forming a metallic film which comprises Sn or Si and has a film thickness of 0.05 μm or less on the substrate, and a step of forming a carbon coat having a film thickness in the range of 0.01 μm to 1.0 μm;
- peeling the metal-carbon laminate from the substrate;
- and
- pulverizing the metal-carbon laminate,
- wherein the metal-carbon laminate is a 3-layer structure having a metallic film, a carbon coat and a metallic film laminated in that order, or a 3-layer structure having a carbon coat, a metallic film and a carbon coat laminated in that order, and
- the metallic film in the 3-layer structure is a single layer.
3 more elements
Dependencies are inferred from the claim text.