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Patent Searching and Data


Title:
SECONDARY BATTERY AND MANUFACTURING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2018/180145
Kind Code:
A1
Abstract:
One purpose of the present invention is to provide a secondary battery, and a manufacturing method thereof, which maintains high insulation between electrodes and which can effectively suppress internal short-circuiting. This secondary battery comprises a positive electrode and a negative electrode arranged opposite to the positive electrode. The positive electrode and the negative electrode each has a current collector and an active substance layer formed on at least one surface of the current collector, and at least one of the positive electrode and the negative electrode further has an insulating layer formed on the surface of the active substance layer. The insulating layer is a porous insulating layer containing a plurality of nonconductive particles, and, expressing the average particle diameter of the particles in μm, the porosity index, represented by the porosity × the average particle diameter of the particles, is less than or equal to 0.4.

Inventors:
MANKYUU TOSHIHIKO (JP)
Application Number:
PCT/JP2018/007467
Publication Date:
October 04, 2018
Filing Date:
February 28, 2018
Export Citation:
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Assignee:
NEC CORP (JP)
International Classes:
H01M10/04; H01M4/02; H01M4/04; H01M4/13; H01M4/139; H01M10/0585; H01M50/443; H01M50/491
Domestic Patent References:
WO2005078828A12005-08-25
Foreign References:
JP2016100201A2016-05-30
JP2011081935A2011-04-21
JP2015005553A2015-01-08
JP2012132121A2012-07-12
JP2007335294A2007-12-27
Attorney, Agent or Firm:
ITO, Katsuhiro (JP)
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