Title:
COPPER FOIL FOR NEGATIVE ELECTRODE CURRENT COLLECTOR WITH CHROMATE FILM, AND NEGATIVE ELECTRODE MEMBER USING COPPER FOIL FOR NEGATIVE ELECTRODE CURRENT COLLECTOR WITH CHROMATE FILM
Document Type and Number:
WIPO Patent Application WO/2012/141178
Kind Code:
A1
Abstract:
The purpose of the present invention is to eliminate variation in the quality of a chromate film provided to a copper foil for a negative electrode current collector in order to eliminate variation in electric capacitance of a lithium ion secondary cell. Adopted in order to achieve this purpose is a copper foil provided with a chromate film and used in the negative electrode current collector of a lithium ion secondary cell, wherein the copper foil for a negative electrode current collector with a chromate film is characterized in that the chromate film contains at least 85% of Cr(OH)3 by surface area. The copper foil for a negative electrode current collector with a chromate film according to the present application is preferably such that the apparent coordination number N of the oxygen closest to chrome in the chromate film is 4.5 or greater.
Inventors:
MAEDA TOMOYUKI (JP)
TOMONAGA SAKIKO (JP)
TABIRA YASUNORI (JP)
TOMONAGA SAKIKO (JP)
TABIRA YASUNORI (JP)
Application Number:
PCT/JP2012/059805
Publication Date:
October 18, 2012
Filing Date:
April 10, 2012
Export Citation:
Assignee:
MITSUI MINING & SMELTING CO (JP)
MAEDA TOMOYUKI (JP)
TOMONAGA SAKIKO (JP)
TABIRA YASUNORI (JP)
MAEDA TOMOYUKI (JP)
TOMONAGA SAKIKO (JP)
TABIRA YASUNORI (JP)
International Classes:
C23C22/24; C23C22/68; C25D9/08; H01M4/66
Foreign References:
| JPH11273683A | 1999-10-08 | |||
| JP2009068042A | 2009-04-02 |
Attorney, Agent or Firm:
YOSHIMURA, KATSUHIRO (JP)
Katsuhiro Yoshimura (JP)
Katsuhiro Yoshimura (JP)
Download PDF:
Claims: