Title:
SURFACE TREATMENT METHOD FOR COPPER FOIL, SURFACE TREATED COPPER FOIL AND COPPER FOIL FOR NEGATIVE ELECTRODE COLLECTOR OF LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2011/108467
Kind Code:
A1
Abstract:
Disclosed is a copper foil for a negative electrode collector capable of simultaneously achieving high capacity and long life charge/discharge cycles in a secondary battery, wherein the front and rear surfaces are of a uniform shape and, for example, the properties of a silicon active material of a lithium ion secondary battery are sufficiently manifested; and a negative electrode using the copper foil. In one embodiment, a first roughened layer of metallic copper is formed by pulse cathode electrolysis roughening treatment on the surface of an untreated rolled copper foil substrate of oxygen-free copper in a first roughening treatment vessel (1) filled with a copper-sulphuric acid electrolyte (12), and a second copper-plate layer is formed on the surface of the first roughened layer by smooth copper plating treatment in a second copper plating treatment vessel (2) filled with a copper-sulphuric acid electrolyte (22).
Inventors:
OGURO RYOICHI (JP)
Application Number:
PCT/JP2011/054371
Publication Date:
September 09, 2011
Filing Date:
February 25, 2011
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO LTD (JP)
OGURO RYOICHI (JP)
OGURO RYOICHI (JP)
International Classes:
H01M4/66; C23F11/00; C25D7/06; H01M4/134; H01M4/1395; H01M4/74
Foreign References:
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| JP2007087789A | 2007-04-05 | |||
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| JP2008127618A | 2008-06-05 | |||
| JP2009205888A | 2009-09-10 | |||
| JP2008059765A | 2008-03-13 | |||
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Attorney, Agent or Firm:
SATOH, TAKAHISA (JP)
Takahisa Sato (JP)
Takahisa Sato (JP)
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Claims: