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Title:
α-ALUMINA, SLURRY, POROUS FILM, LAMINATED SEPARATOR, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2020/138014
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide alumina to be used in a slurry capable of suppressing irregularities on the surface of a porous film. The present invention is an α-alumina having a crystallite size of 95 nm or less and a lattice strain of 0.0020 or less determined by Rietveld refinement. The BET specific surface area of the α-alumina by the nitrogen adsorption method is preferably 10 m2/g or less. Also, the volume-based cumulative 50% equivalent particle size D50 of the α-alumina is preferably 2 μm or less.

Inventors:
NASU TOMOMICHI (JP)
SAKAMOTO SYUNSUKE (JP)
OZAKI HIROTAKA (JP)
Application Number:
PCT/JP2019/050452
Publication Date:
July 02, 2020
Filing Date:
December 24, 2019
Export Citation:
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Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
C01F7/441; H01M2/16; H01M4/13; H01M4/139; H01M10/0566
Domestic Patent References:
WO2016098579A12016-06-23
WO2016093242A12016-06-16
WO2014017662A12014-01-30
Foreign References:
JPH10101329A1998-04-21
JP2018138509A2018-09-06
JP2008137838A2008-06-19
JPH11268911A1999-10-05
JP2004227972A2004-08-12
JP2010208933A2010-09-24
JP2010155770A2010-07-15
JP2018242924A2018-12-26
Other References:
See also references of EP 3878815A4
Attorney, Agent or Firm:
USFI PATENT ATTORNEYS INTERNATIONAL OFFICE (JP)
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