Title:
LITHIUM-ION SECONDARY BATTERY AND METHOD FOR MANUFACTURING LITHIUM-ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/070933
Kind Code:
A1
Abstract:
A lithium-ion secondary battery (1) consists of layers in the following order: a substrate (10) that serves as a positive electrode current collector layer; an underlayer (20); a positive electrode layer (30) containing a positive electrode active material; a solid electrolyte layer (40) containing Li3PO4 but not containing LiPON; a retaining layer (50) composed of a noble metal or the like; a diffusion prevention layer (60) composed of an amorphous alloy; and a negative electrode current collector layer (70) composed of a noble metal. A surface (10a) of the substrate (10) for laminating the underlayer (20) etc. has a maximum-minimum height difference, which is the height difference between the maximum height and the minimum height obtained by measuring unevenness in a range of 20 μm × 20 μm by Atomic Force Microscope (AFM), that is established at 78 nm or less. Thus, in a thin-film laminated lithium-ion secondary battery using Li3PO4 as an inorganic solid electrolyte constituting a solid electrolyte layer, an increase in internal resistance and a decrease in capacity retention rate are both suppressed.
Inventors:
YASUDA TAKAKI (JP)
SAKAWAKI AKIRA (JP)
UCHIDA HARUAKI (JP)
WATANABE YASUMASA (JP)
SAKAWAKI AKIRA (JP)
UCHIDA HARUAKI (JP)
WATANABE YASUMASA (JP)
Application Number:
PCT/JP2019/026269
Publication Date:
April 09, 2020
Filing Date:
July 02, 2019
Export Citation:
Assignee:
SHOWA DENKO KK (JP)
International Classes:
H01M10/052; H01M4/13; H01M4/62; H01M4/64; H01M4/66; H01M10/0562; H01M10/058
Foreign References:
| JP2018029046A | 2018-02-22 | |||
| JP2016225281A | 2016-12-28 | |||
| JP2013058376A | 2013-03-28 | |||
| JP2012256581A | 2012-12-27 | |||
| JPH07267800A | 1995-10-17 | |||
| JPH08274195A | 1996-10-18 | |||
| JP2004063419A | 2004-02-26 | |||
| JP2016213124A | 2016-12-15 | |||
| JP2018129159A | 2018-08-16 |
Other References:
"RECHARGEABLE LITHIUM BATTERIES. 1st ed.", 20 August 2010, OHMSHA, LTD., pages: 132 - 133
Attorney, Agent or Firm:
FURUBE, Jiro et al. (JP)
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