US 12,438,183 B2
Solid electrolyte sheet, method for manufacturing same, and sodium ion all-solid-state secondary cell
Junichi Ikejiri, Otsu (JP); Hideo Yamauchi, Otsu (JP); and Fumio Sato, Otsu (JP)
Assigned to NIPPON ELECTRIC GLASS CO., LTD., Shiga (JP)
Filed by NIPPON ELECTRIC GLASS CO., LTD., Otsu (JP)
Filed on Feb. 21, 2020, as Appl. No. 16/797,118.
Application 16/797,118 is a division of application No. 15/742,538, granted, now 10,622,673, previously published as PCT/JP2016/072041, filed on Jul. 27, 2016.
Claims priority of application No. 2015-157936 (JP), filed on Aug. 10, 2015.
Prior Publication US 2020/0194831 A1, Jun. 18, 2020
Int. Cl. H01M 10/0562 (2010.01); C04B 35/10 (2006.01); C04B 35/113 (2006.01); C04B 35/622 (2006.01); C04B 35/626 (2006.01); C04B 35/634 (2006.01); C04B 35/64 (2006.01); H01M 10/054 (2010.01)
CPC H01M 10/0562 (2013.01) [C04B 35/10 (2013.01); C04B 35/113 (2013.01); C04B 35/62218 (2013.01); C04B 35/62625 (2013.01); C04B 35/62635 (2013.01); C04B 35/6264 (2013.01); C04B 35/63424 (2013.01); C04B 35/64 (2013.01); H01M 10/054 (2013.01); C04B 2235/3201 (2013.01); C04B 2235/3203 (2013.01); C04B 2235/3206 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3225 (2013.01); C04B 2235/3244 (2013.01); C04B 2235/6025 (2013.01); C04B 2235/604 (2013.01); C04B 2235/77 (2013.01); H01M 2300/0071 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A method for manufacturing a solid electrolyte sheet containing β-alumina and/or β″-alumina and having a thickness of 1 mm or less and a voidage of 20% or less, the method comprising the steps of:
(a) making raw material powder containing Al2O3 as a main component into a slurry;
(b) applying the slurry on a base material and drying the slurry to obtain a green sheet having a thickness of 0.1 to 1.8 mm; and
(c) isostatically pressing the green sheet and then firing the green sheet to produce β-alumina and/or β″-alumina; wherein
the raw material powder consists of, in % by mole, 65 to 98% Al2O3, 13.7 to 20% Na2O, 5.5 to 10% of MgO, 4.7 to 15% ZrO2, 0.2 to 5% Y2O3.