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Title:
LITHIUM ION-CONDUCTING OXIDE
Document Type and Number:
WIPO Patent Application WO/2021/039834
Kind Code:
A1
Abstract:
One embodiment of the present invention pertains to a lithium ion-conducting oxide or a lithium ion secondary battery, wherein said lithium ion-conducting oxide has, as constituent elements, at least lithium, tantalum, M1, phosphorus, and oxygen, M1 is at least one metal element selected from the group (excluding tantalum) consisting of elements belonging to groups 4, 5, 6, 13, and 14, the ratio of the atomic numbers of lithium, tantalum, M1, phosphorus, and oxygen as constituent elements is 1:2-x:x:1:8, x is greater than 0 and less than 1, and said lithium ion-conducting oxide contains a monoclinic crystal.　For example, when a lithium ion-conducting oxide according to a preferred embodiment of the present invention is used as a solid electrolyte of a lithium ion secondary battery, a lithium ion secondary battery can be obtained, which has high lithium ion conductivity at a crystal grain boundary and well-balanced and high ionic conductance both in crystal grains and at the crystal grain boundary.

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Inventors:
SEI RYOSUKE (JP)
LEE KUNCHAN (JP)
KURAHASHI SHUNSUKE (JP)
Application Number:
PCT/JP2020/032155
Publication Date:
March 04, 2021
Filing Date:
August 26, 2020
Export Citation:
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Assignee:
SHOWA DENKO KK (JP)
International Classes:
C01B25/45; H01B1/06; H01M10/052; H01M10/0562
Foreign References:
JP2018195483A2018-12-06
KR20200020172A2020-02-26
CN111403805A2020-07-10
JP2016169145A2016-09-23
Other References:
HUSSAIN, FIAZ ET AL.: "Theoretical Insights into Li-Ion Transport in LiTa2P08", JOURNAL OF PHYSICAL CHEMISTRY C, vol. 123, no. 32, 23 July 2019 (2019-07-23), pages 19282 - 19287, XP055796425
J. KIM ET AL., J. MATER. CHEM. A, vol. 6, 2018, pages 22478 - 22482
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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