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.
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Inventors:
NASU TOMOMICHI (JP)
SAKAMOTO SYUNSUKE (JP)
OZAKI HIROTAKA (JP)
SAKAMOTO SYUNSUKE (JP)
OZAKI HIROTAKA (JP)
Application Number:
PCT/JP2019/050452
Publication Date:
July 02, 2020
Filing Date:
December 24, 2019
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
C01F7/441; H01M2/16; H01M4/13; H01M4/139; H01M10/0566
Domestic Patent References:
WO2016098579A1 | 2016-06-23 | |||
WO2016093242A1 | 2016-06-16 | |||
WO2014017662A1 | 2014-01-30 |
Foreign References:
JPH10101329A | 1998-04-21 | |||
JP2018138509A | 2018-09-06 | |||
JP2008137838A | 2008-06-19 | |||
JPH11268911A | 1999-10-05 | |||
JP2004227972A | 2004-08-12 | |||
JP2010208933A | 2010-09-24 | |||
JP2010155770A | 2010-07-15 | |||
JP2018242924A | 2018-12-26 |
Other References:
See also references of EP 3878815A4
Attorney, Agent or Firm:
USFI PATENT ATTORNEYS INTERNATIONAL OFFICE (JP)
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