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Title:
NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2018/216585
Kind Code:
A1
Abstract:
Provided is a non-aqueous electrolyte secondary battery having excellent battery characteristics and excellent reliability. The provided non-aqueous electrolyte secondary battery comprises at least: a negative electrode for a non-aqueous electrolyte secondary battery, the negative electrode containing a negative electrode mixture; a positive electrode for a non-aqueous electrolyte secondary battery; and an electrolytic solution containing an electrolyte and a solvent. The negative electrode mixture contains a negative electrode active material powder, the negative electrode active material powder contains a carbon-based material and a silicon-based material, and a mixture ratio of the carbon-based material to the silicon-based material (carbon-based material (mass%)/silicon-based material (mass%)) is from 90 mass%/10 mass% to 0 mass%/100 mass%. In a deep discharge with a current rate of 0.001 ItA reaching a battery voltage of 0 V, the negative electrode potential at a battery voltage of 0 V is 3.2 Vvs (Li/Li+) or less, and the electrolyte concentration in the negative electrode mixture is greater than the electrolyte concentration in the electrolytic solution present in the non-aqueous electrolyte secondary battery with the negative electrode mixture removed.

Inventors:
NAKAMURA TOSHIKAZU (JP)
Application Number:
PCT/JP2018/019019
Publication Date:
November 29, 2018
Filing Date:
May 17, 2018
Export Citation:
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Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01M10/052; H01M4/133; H01M4/134; H01M4/136; H01M4/139; H01M4/36; H01M4/38; H01M4/48; H01M4/58; H01M4/587; H01M4/62; H01M10/058; H01M50/119; H01M50/124
Domestic Patent References:
WO2014132579A12014-09-04
Foreign References:
JP2016076477A2016-05-12
JPH05144473A1993-06-11
JPH07307164A1995-11-21
JPH07335201A1995-12-22
JP2013145712A2013-07-25
JP2009076373A2009-04-09
JP2006156330A2006-06-15
JP2012038686A2012-02-23
JP2012074189A2012-04-12
JP2013243127A2013-12-05
JP2014235884A2014-12-15
Other References:
See also references of EP 3618161A4
Attorney, Agent or Firm:
WATANABE Kaoru (JP)
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