Title:
CYLINDRICAL SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/189557
Kind Code:
A1
Abstract:
This cylindrical secondary battery comprises: an electrode body in which a strip-shaped positive electrode and a strip-shaped negative electrode are wound with a separator interposed therebetween; a bottomed cylindrical exterior body, having an outer diameter of 25 mm or more, housing the electrode body and being connected to the negative electrode; and a sealing body sealing an opening at the upper end of the exterior body and being connected to the positive electrode. The positive electrode includes a positive-electrode current collector, and a positive-electrode mixture layer formed on the surface of the positive-electrode current collector, the positive-electrode mixture layer containing a positive-electrode active material and a sulfonic acid compound represented by general formula (I). The positive-electrode active material includes a lithium-containing composite oxide having a layered rock-salt structure. The weight per unit area of the positive-electrode mixture layer is 250 g/m2 or more. In the electrode body, three or more positive-electrode leads are led out. [Formula 1] (In the formula, A is a group 1 element or a group 2 element, R is a hydrocarbon group, and n is 1 or 2.)
Inventors:
KAWAKITA AKIHIRO
INOUE KATSUYA
OGASAWARA TAKESHI
INOUE KATSUYA
OGASAWARA TAKESHI
Application Number:
PCT/JP2023/009903
Publication Date:
October 05, 2023
Filing Date:
March 14, 2023
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H01M4/131; H01M4/36; H01M4/505; H01M4/525; H01M10/052; H01M10/0587; H01M50/107; H01M50/131; H01M50/152; H01M50/533; H01M50/536
Domestic Patent References:
| WO2010001892A1 | 2010-01-07 | |||
| WO2009110250A1 | 2009-09-11 | |||
| WO2023032482A1 | 2023-03-09 |
Foreign References:
| JP2004319311A | 2004-11-11 | |||
| JP2005100955A | 2005-04-14 | |||
| JP2003077446A | 2003-03-14 | |||
| JP2002246008A | 2002-08-30 | |||
| JP2012195132A | 2012-10-11 | |||
| JP2019169286A | 2019-10-03 | |||
| JP2009193780A | 2009-08-27 |
Attorney, Agent or Firm:
YKI INTELLECTUAL PROPERTY ATTORNEYS (JP)
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