US 12,218,304 B2
Solid composite electrolyte
Vincent Finsy, Halle (BE); Luca Merlo, Ixelles (BE); Marc-David Braida, Bry-sur-Marne (FR); and Laure Bertry, Aubervilliers (FR)
Assigned to SYENSQO SA, Brussels (BE)
Appl. No. 17/312,023
Filed by SYENSQO SA, Brussels (BE)
PCT Filed Dec. 11, 2019, PCT No. PCT/EP2019/084682
§ 371(c)(1), (2) Date Jun. 9, 2021,
PCT Pub. No. WO2020/126751, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 18215742 (EP), filed on Dec. 21, 2018.
Prior Publication US 2022/0029193 A1, Jan. 27, 2022
Int. Cl. H01M 10/0562 (2010.01); H01M 10/0525 (2010.01); H01M 10/0563 (2010.01)
CPC H01M 10/0562 (2013.01) [H01M 10/0525 (2013.01); H01M 10/0563 (2013.01); H01M 2300/0068 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A solid composite electrolyte comprising:
i) at least one solid inorganic particle,
ii) at least one ionic liquid electrolyte, and
iii) at least one ionically non-conductive polymer,
wherein the at least one solid inorganic particle i) is ionic conductive and is blended with the at least one ionic liquid electrolyte ii) such that at least part of the at least one ionic liquid electrolyte covers at least part of the surface of the at least one solid inorganic particle, reducing grain-to-grain resistance between the at least one solid inorganic particle;
wherein an amount of the at least one solid inorganic particle i) is from 60.0 to 98.0% by weight (wt %), based on the total weight of the solid composite electrolyte; and
wherein the ionic liquid electrolyte comprises:
a positively charged cation selected from the group consisting of imidazolium, pyridinium, pyrrolidinium and piperidinium ions optionally containing one or more C1-C30 alkyl groups, and
a negatively charged anion selected from the group consisting of halides, fluorinated anions and borates,
wherein C1-C30 alkyl groups include methyl, ethyl, propyl, iso-propyl, n-butyl, isobutyl, sec-butyl, t-butyl, pentyl, isopentyl, 2,2-dimethyl-propyl, hexyl, 2,3-dimethyl-2-butyl, heptyl, 2,2-dimethyl-3-pently, 2-methyl-2-hexyl, octyl, 4-methyl-3-heptyl, nonyl, decyl, undecyl, and dodecyl groups.