Title:
NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2017/179395
Kind Code:
A1
Abstract:
According to the present invention, a positive electrode active material layer (21) of a positive electrode (2) and a negative electrode active material layer (31) of a negative electrode (3) face each other in a nonaqueous electrolyte secondary battery. The positive electrode active material layer contains a positive electrode active material that has a core part and a shell part. If A (m2/g) represents the specific surface area of the core part and B (mass%) represents a mass ratio of the shell part in the positive electrode active material, A and B satisfy 0.1 ≤ B/A ≤ 5. If C (mm2) represents the area of the facing surfaces of the positive electrode active material layer and the negative electrode active material layer and D (mAh) is the battery capacity, C and D satisfy C/D ≥ 45 (mm2/mAh). A nonaqueous electrolyte (4) contains a lithium salt of an oxalato complex at a ratio of 0.1-1 mass%. This nonaqueous electrolyte secondary battery is manufactured by assembling a nonaqueous electrolyte secondary battery and performing a coating film formation treatment at 4.1 V or higher at a temperature of 35°C or higher.
Inventors:
YOSHIDA SHUHEI (JP)
OHIRA KOJI (JP)
SHIBATA DAISUKE (JP)
INUKAI SATOSHI (JP)
OHIRA KOJI (JP)
SHIBATA DAISUKE (JP)
INUKAI SATOSHI (JP)
Application Number:
PCT/JP2017/011949
Publication Date:
October 19, 2017
Filing Date:
March 24, 2017
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
H01M10/052; H01M4/136; H01M4/36; H01M4/58; H01M10/0567; H01M10/0585
Domestic Patent References:
| WO2013146168A1 | 2013-10-03 |
Foreign References:
| JP2016006800A | 2016-01-14 | |||
| JP2016001516A | 2016-01-07 | |||
| JP2015207538A | 2015-11-19 | |||
| JP2016035820A | 2016-03-17 | |||
| JP2012238524A | 2012-12-06 | |||
| JP2014011065A | 2014-01-20 |
Attorney, Agent or Firm:
JIN Shunji (JP)
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