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Title:
POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY CELL AND POSITIVE ELECTRODE CONTAINING SAME, AND LITHIUM ION SECONDARY CELL PROVIDED WITH SAID POSITIVE ELECTRODE
Document Type and Number:
WIPO Patent Application WO/2017/208703
Kind Code:
A1
Abstract:
Provided are a positive electrode active material for a lithium ion secondary cell capable of suppressing a rise in the internal resistance inside a cell associated with the charge-discharge cycle, a positive electrode containing the positive electrode active material, and a lithium ion secondary cell provided with the positive electrode. For this purpose, contained is a lithium composite compound represented by Li1+αNixCoyM1 1–x–y–zM2 zO2+β, and when porosity of opening diameter 0.6 µm or less measured using the mercury press-in method is defined as Pi, and porosity of opening diameter 0.6 µm or less after inputting to a mold of diameter 10 mm and pressing with a load of 40 MPa measured using the mercury press-in method is defined as Pp, the value of Pp/Pi is 1.5 or less.

Inventors:
TOKORO Hisato (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
NAKABAYASHI Takashi (2-70, Konan 1-chome, Minato-k, Tokyo 24, 〒1088224, JP)
TAKANO Shuichi (2-70, Konan 1-chome, Minato-k, Tokyo 24, 〒1088224, JP)
TAKAHASHI Shin (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
GUNJI Akira (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
TOYAMA Tatsuya (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
Application Number:
JP2017/016837
Publication Date:
December 07, 2017
Filing Date:
April 27, 2017
Export Citation:
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Assignee:
HITACHI METALS, LTD. (2-70, Konan 1-chome Minato-k, Tokyo 24, 〒1088224, JP)
International Classes:
H01M4/525; H01M4/505
Domestic Patent References:
2011-09-09
Foreign References:
JPS5313392B21978-05-10
Attorney, Agent or Firm:
ISONO INTERNATIONAL PATENT OFFICE, P.C. (Hulic Toranomon Building, 1-18 Toranomon 1-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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