NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY CELLS, MANUFACTURING METHOD THEREFOR, AND NONAQUEOUS ELECTROLYTE SECONDARY CELL

Title:

NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY CELLS, MANUFACTURING METHOD THEREFOR, AND NONAQUEOUS ELECTROLYTE SECONDARY CELL

Document Type and Number:

WIPO Patent Application WO/2011/001665

Kind Code:

A1

Abstract:

Disclosed is a nonaqueous electrolyte secondary cell in which a group of flat wound electrodes (10) having a positive electrode, a negative electrode and a separator, and a nonaqueous electrolyte secondary cell are stored within a square battery case, wherein the negative electrode has a tensile strength of 15N/cm or less at an elongation of 1% in the lengthwise direction.The negative electrode is provided with a negative electrode current collector and a negative electrode active material layer, wherein the negative electrode active material layer comprises (1) a negative electrode active material that expands or contracts as lithium ions are stored or released, (2) a rubber binder in which the pyrolysis temperature is equal to or greater than the softening temperature of the negative electrode current collector, (3) a water-soluble polymer compound (A) in which the pyrolysis temperature is equal to or greater than the softening temperature of the negative electrode current collector, and (4) a water-soluble polymer compound (B) in which the pyrolysis temperature is equal to or greater than the softening temperature of the negative electrode current collector, and the swelling degree relative to the nonaqueous electrolyte is lower than that of the water-soluble polymer compound (A). A coating layer containing the water-soluble polymer compound (A) is formed on the surface of the negative electrode active material.

Inventors:

MURAOKA YOSHIYUKI
UGAJI MASAYA
KASAMATSU SHINJI

Application Number:

PCT/JP2010/004288

Publication Date:

January 06, 2011

Filing Date:

June 29, 2010

Export Citation:

Click for automatic bibliography generation Help

Assignee:

PANASONIC CORP (JP)
MURAOKA YOSHIYUKI
UGAJI MASAYA
KASAMATSU SHINJI

International Classes:

H01M4/13; H01M4/139; H01M4/36; H01M4/62; H01M4/66; H01M10/052; H01M10/0587

Foreign References:

JPH07335221A	1995-12-22
JP2001023642A	2001-01-26
JPH08329946A	1996-12-13
JP2002117851A	2002-04-19
JP2002093420A	2002-03-29

Attorney, Agent or Firm:

ISHII, Kazuo et al. (JP)
Kazuo Ishii (JP)

Download PDF:

View/Download PDF PDF Help

Previous Patent: IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND STORAGE MEDIUM

Next Patent: POSITIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, METHOD FOR PRODUCING SAME, AND NONA...