# US 2004/0072079 A1 · Negative electrode current collector, negative electrode using the same, and non aqueous electrolytic secondary cell

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- Number: US 2004/0072079 A1
- Document ID: US20040072079A1
- Status: Published application
- Kind: A1
- Application number: 10/469,733
- Filed: 2003-09-03
- Published: 2004-04-15
- Earliest claimed: 2001-11-07
- Assignees: Matsushita Electric Industrial Co., Ltd.
- Inventors: Tatsuya Hashimoto; Yorihito Ohana
- Web page: https://patentgrep.com/patent/US20040072079A1

## CPC

- H01M 4/661: {Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence)}
- H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 4/662: {Alloys (collectors of lead alloys H01M4/685)}
- H01M 10/0587: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A negative electrode current collector for a non-aqueous electrolyte secondary battery comprising copper or a copper alloy, characterized in that the copper or copper alloy has a ratio I200/I111 of an intensity I200 of a peak attributed to (200) plane to an intensity I111 of a peak attributed to (111) plane, which satisfies the equation (1): 0.3≦I200/I111≦4.0 (1) in an X-ray diffraction pattern measured using CuKα radiation as a radiation source.

## Claims

### Claim 1

A negative electrode current collector for a non-aqueous electrolyte secondary battery comprising copper or a copper alloy, characterized in that said copper or copper alloy has a ratio I200/I111 of an intensity I200 of a peak attributed to (200) plane to an intensity I111 of a peak attributed to (111) plane, which satisfies the equation (1):
0.3≦I200/I111≦4.0 (1)
in an x-ray diffraction pattern measured using CuKα radiation as a radiation source.

### Claim 2 (depends on 1)

The negative electrode current collector in accordance with claim 1, wherein said copper or copper alloy comprises an electrolytic copper or electrolytic copper alloy.

### Claim 3 (depends on 1)

A negative electrode for a non-aqueous electrolyte secondary battery comprising a negative electrode current collector and a negative electrode active material layer carried on at least one face of said negative electrode current collector, characterized in that
said negative electrode active material layer comprises a carbonaceous material, and
said negative electrode current collector is the negative electrode current collector in accordance with claim 1.

### Claim 4 (depends on 3)

A non-aqueous electrolyte secondary battery comprising an electrode group, a non-aqueous electrolyte and a battery case for housing said electrode group and said non-aqueous electrolyte, characterized in that
said electrode group comprises a positive electrode, a negative electrode and a separator interposed between said positive and negative electrodes,
said positive electrode comprises a lithium transition metal composite oxide, and
said negative electrode is the negative electrode in accordance with claim 3.