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Title:
NON-AQUEOUS ELECTROLYTE SOLUTION AND POWER STORAGE DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2021/065863
Kind Code:
A1
Abstract:
The present invention is a non-aqueous electrolyte solution for use in a power storage device provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte solution in which an electrolyte salt is dissolved in a non-aqueous solvent. The positive electrode includes a positive electrode active material in which the content of Ni atoms with respect to the total amount of atoms of transition metal elements in the positive electrode active material is 50 atomic% or more. The non-aqueous electrolyte solution that is for use in a power storage device is characterized in that the content of a specific compound represented by general formula (I) and including a P=O group and a carbonyl group is 0.001-2 mass%. Also provided is a power storage device. The present invention reduces initial resistance and makes it possible to improve the battery capacity retention rate after storage at high temperatures.

Inventors:
KURIHARA, Yoshiki (1, Chikko-Shinmachi 3-cho, Nishi-ku, Sakai-sh, Osaka 43, JP)
SHIMAMOTO, Kei (1, Chikko-Shinmachi 3-cho, Nishi-ku, Sakai-sh, Osaka 43, JP)
KIDO, Taiki (1, Chikko-Shinmachi 3-cho, Nishi-ku, Sakai-sh, Osaka 43, JP)
YASO, Yusuke (1, Chikko-Shinmachi 3-cho, Nishi-ku, Sakai-sh, Osaka 43, JP)
Application Number:
JP2020/036803
Publication Date:
April 08, 2021
Filing Date:
September 29, 2020
Export Citation:
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Assignee:
MU IONIC SOLUTIONS CORPORATION (Chiyoda-ku Tokyo, 51, JP)
International Classes:
H01M4/525; H01M10/052; H01M10/0567; H01M10/0568
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (25-2 Toranomon 3-chome, Minato-k, Tokyo 01, JP)
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