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Title:
LITHIUM-ION SECONDARY BATTERY, ELECTRODE FOR SECONDARY BATTERY, AND ELECTROLYTIC COPPER FOIL FOR SECONDARY BATTERY ELECTRODE
Document Type and Number:
WIPO Patent Application WO/2012/091060
Kind Code:
A1
Abstract:
To supply an electrolytic copper foil for lithium-ion secondary battery negative electrodes with which it is possible to produce a long-life lithium-ion secondary battery in which there is no decline in the capacity retention ratio even when the charge/discharge cycle is repeated, and no deformation of a negative electrode current collector: the electrolytic copper foil for configuring the negative electrode current collector of a lithium-ion secondary battery has, after heat treatment at 200-400°C, a 0.2% yield strength of 250N/mm2 or more, and elongation of 2.5% or more; and the surface on which the active material layer of the electrolytic copper foil is provided has been rust-proofed, or roughened and rust-proofed. Analysis of the depth profile (depth direction) obtained by performing secondary ion mass spectrometry (SIMS) in the thickness direction of the copper foil results in the following: chlorine (Cl), carbon (C), and oxygen (O) are each contained in a concentration of 1017-5x1020 atoms/cm3, and sulfur (S) and nitrogen (N) are each contained in a concentration of 1015-1019 atoms/cm3.

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Inventors:
SUZUKI AKITOSHI (JP)
SHINOZAKI KENSAKU (JP)
TANI TOSHIO (JP)
SASAKI HIROKAZU (JP)
FUTABA ISAMU (JP)
HATAYA KOUJI (JP)
OHTOMO SHINYA (JP)
YOSHIKAWA HIROKAZU (JP)
Application Number:
PCT/JP2011/080314
Publication Date:
July 05, 2012
Filing Date:
December 27, 2011
Export Citation:
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Assignee:
FURUKAWA ELECTRIC CO LTD (JP)
SUZUKI AKITOSHI (JP)
SHINOZAKI KENSAKU (JP)
TANI TOSHIO (JP)
SASAKI HIROKAZU (JP)
FUTABA ISAMU (JP)
HATAYA KOUJI (JP)
OHTOMO SHINYA (JP)
YOSHIKAWA HIROKAZU (JP)
International Classes:
H01M4/66; C23F1/18; C25D1/04; C25D7/06; H01M4/13; H01M4/139
Domestic Patent References:
WO2008132987A12008-11-06
WO2010110205A12010-09-30
Foreign References:
JP2006202635A2006-08-03
JPH11273683A1999-10-08
JP2006152420A2006-06-15
JPH09306504A1997-11-28
JP2009295599A2009-12-17
JPH07268678A1995-10-17
JP2004079523A2004-03-11
JP3742144B22006-02-01
JP3850155B22006-11-29
JPH10255768A1998-09-25
JP2002083594A2002-03-22
JP2007227328A2007-09-06
JPS5339376B11978-10-20
JP2740768B21998-04-15
JPH1096088A1998-04-14
JP2001189154A2001-07-10
Other References:
See also references of EP 2654111A4
Attorney, Agent or Firm:
SATOH, TAKAHISA (JP)
Takahisa Sato (JP)
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Claims:



 
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