US 11,870,033 B2
Solid electrolyte, method for preparing same, and all-solid battery comprising same
Daeil Kim, Daejeon (KR); and Jonghyun Chae, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 16/958,426
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Jan. 11, 2019, PCT No. PCT/KR2019/000438
§ 371(c)(1), (2) Date Jun. 26, 2020,
PCT Pub. No. WO2020/013410, PCT Pub. Date Jan. 16, 2020.
Claims priority of application No. 10-2018-0079193 (KR), filed on Jul. 9, 2018.
Prior Publication US 2021/0066751 A1, Mar. 4, 2021
Int. Cl. H01M 10/0565 (2010.01); C08F 290/14 (2006.01); H01M 10/0525 (2010.01); H01M 50/411 (2021.01); H01M 50/417 (2021.01); C08F 12/14 (2006.01); C08F 20/14 (2006.01)
CPC H01M 10/0565 (2013.01) [C08F 290/141 (2013.01); H01M 10/0525 (2013.01); H01M 50/411 (2021.01); H01M 50/417 (2021.01); C08F 12/14 (2013.01); C08F 20/14 (2013.01); H01M 2300/0065 (2013.01); H01M 2300/0082 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A solid polymer electrolyte comprising:
a multifunctional acrylate-based polymer;
a C2 to C10 polyalkylene oxide;
a lithium salt; and
a non-aqueous solvent, which is present in a solid state at room temperature and is homogeneously mixed within the solid polymer electrolyte through a melting process, and wherein the non-aqueous solvent comprises dimethyl sulfone,
wherein the multifunctional acrylate-based polymer and the polyalkylene oxide form a semi-interpenetrating polymer network (semi-IPN), and
wherein the multifunctional acrylate-based polymer, the C2 to C10 polyalkylene oxide, the lithium salt and the non-aqueous solvent together are present in an amount of more than 70% by weight of solids, based on a total weight of the electrolyte.
 
14. A method of manufacturing the electrolyte according to claim 1 comprising:
(1) mixing an electrolyte composition comprising a multifunctional acrylate-based polymer monomer, a C2 to C10 polyalkylene oxide, a lithium salt and a non-aqueous solvent;
(2) melting the electrolyte composition at 100° C. to 150° C. and
(3) photopolymerizing the melted electrolyte composition to obtain the electrolyte.