Title:
POSITIVE ELECTRODE ACTIVE MATERIAL FOR ALL-SOLID-STATE LITHIUM ION BATTERIES, POSITIVE ELECTRODE FOR ALL-SOLID-STATE LITHIUM ION BATTERIES, ALL-SOLID-STATE LITHIUM ION BATTERY, AND METHOD FOR PRODUCING POSITIVE ELECTRODE ACTIVE MATERIAL FOR ALL-SOLID-STATE LITHIUM ION BATTERIES
Document Type and Number:
WIPO Patent Application WO/2020/261600
Kind Code:
A1
Abstract:
The present invention provides: a positive electrode active material for all-solid-state lithium ion batteries, said positive electrode active material being suppressed in the formation of a high resistance layer at the interface between itself and a sulfide solid electrolyte, while having improved electron conductivity and exhibiting good output characteristics if applied to an all-solid-state lithium ion battery; a positive electrode for all-solid-state lithium ion batteries using this positive electrode active material for all-solid-state lithium ion batteries; an all-solid-state lithium ion battery; and a method for producing a positive electrode active material for all-solid-state lithium ion batteries. A positive electrode active material for all-solid-state lithium ion batteries, said positive electrode active material comprising: a core positive electrode active material that has a composition represented by formula LiaNibCocMdO2 (wherein M represents at least one element selected from among Mn, V, Mg, Ti and Al; and 1.00 ≤ a ≤ 1.02, 0.8 ≤ b ≤ 0.9 and (b + c + d) = 1 are satisfied); and a cover part that is formed on the surface of the core positive electrode active material. The cover part sequentially comprises, from the surface of the core positive electrode active material, a layer of lithium niobate and a layer of carbon in this order.
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Inventors:
KASHIMURA TOSHIHIDE (JP)
Application Number:
PCT/JP2019/047955
Publication Date:
December 30, 2020
Filing Date:
December 06, 2019
Export Citation:
Assignee:
JX NIPPON MINING & METALS CORP (JP)
International Classes:
H01M4/36; H01M4/505; H01M4/525; H01M10/052; H01M10/0562
Domestic Patent References:
| WO2012157046A1 | 2012-11-22 |
Foreign References:
| JP2016009614A | 2016-01-18 | |||
| JP2012256550A | 2012-12-27 | |||
| JP2019091686A | 2019-06-13 | |||
| JP2018116784A | 2018-07-26 | |||
| JP2004250771A | 2004-09-09 | |||
| JP2016072177A | 2016-05-09 | |||
| JP2016103411A | 2016-06-02 | |||
| JP2012243443A | 2012-12-10 |
Other References:
See also references of EP 3783705A4
Attorney, Agent or Firm:
AXIS PATENT INTERNATIONAL (JP)
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