NEGATIVE ELECTRODE AND METHOD FOR PRODUCING THE SAME AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
First Claim
1. A negative electrode comprising:
- a negative electrode current collector;
a thin film-like negative electrode active material layer formed on a surface of the negative electrode current collector and including an alloy-based negative electrode active material;
a negative electrode lead containing at least one metal or alloy selected from the group consisting of nickel, nickel alloys, copper, and copper alloys; and
an alloy layer interposed between the negative electrode current collector and the negative electrode lead, to bond the negative electrode current collector and the negative electrode lead.
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Accused Products
Abstract
In a negative electrode including a negative electrode plate, a negative electrode lead, and an alloy layer, the negative electrode plate includes a negative electrode current collector and a thin film-like negative electrode active material layer including an alloy-based negative electrode active material and being formed on a surface of the negative electrode current collector; the negative electrode lead contains at least one metal or alloy selected from the group consisting of nickel, nickel alloys, copper, and copper alloys; and the negative electrode current collector and the negative electrode lead are bonded to each other via an alloy layer. As such, in the negative electrode utilizing an alloy-based negative electrode active material, the negative electrode current collector and the negative electrode lead are bonded to each other in an efficient and secured manner, and the conductivity between the negative electrode current collector and the negative electrode lead is improved. As a result, a high capacity negative electrode having good current collecting performance is obtained.
16 Citations
13 Claims
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1. A negative electrode comprising:
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a negative electrode current collector; a thin film-like negative electrode active material layer formed on a surface of the negative electrode current collector and including an alloy-based negative electrode active material; a negative electrode lead containing at least one metal or alloy selected from the group consisting of nickel, nickel alloys, copper, and copper alloys; and an alloy layer interposed between the negative electrode current collector and the negative electrode lead, to bond the negative electrode current collector and the negative electrode lead. - View Dependent Claims (2, 3, 4, 5, 6, 7, 13)
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8. A method for producing a negative electrode, the method comprising:
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a first step of forming a thin film-like negative electrode active material layer including an alloy-based negative electrode active material, on a surface of a negative electrode current collector, to prepare a negative electrode plate; a second step of bringing the thin film-like negative electrode active material layer into contact with a negative electrode lead containing at least one metal or alloy selected from the group consisting of nickel, nickel alloys, copper, and copper alloys; and a third step of arc welding at least part of a portion where the thin film-like negative electrode active material layer is in contact with the negative electrode lead. - View Dependent Claims (9, 10, 11, 12)
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Specification