US 12,191,476 B2
Solid electrolyte, method for preparing same, and all-solid-state battery including same
Daeil Kim, Daejeon (KR); Jonghyun Chae, Daejeon (KR); Suhwan Kim, Daejeon (KR); Sung Chul Lim, Daejeon (KR); and Jihoon Ahn, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/042,805
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Aug. 22, 2019, PCT No. PCT/KR2019/010669
§ 371(c)(1), (2) Date Sep. 28, 2020,
PCT Pub. No. WO2020/045893, PCT Pub. Date Mar. 5, 2020.
Claims priority of application No. 10-2018-0103396 (KR), filed on Aug. 31, 2018; and application No. 10-2019-0100981 (KR), filed on Aug. 19, 2019.
Prior Publication US 2021/0028439 A1, Jan. 28, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/131 (2010.01); C08F 290/14 (2006.01); H01M 4/04 (2006.01); H01M 4/134 (2010.01); H01M 4/36 (2006.01); H01M 10/0525 (2010.01); H01M 10/0565 (2010.01); H01M 50/411 (2021.01); H01M 50/417 (2021.01); C08F 12/14 (2006.01); C08F 20/14 (2006.01)
CPC H01M 4/131 (2013.01) [C08F 290/141 (2013.01); H01M 4/0471 (2013.01); H01M 4/134 (2013.01); H01M 4/364 (2013.01); H01M 10/0525 (2013.01); H01M 10/0565 (2013.01); H01M 50/411 (2021.01); H01M 50/417 (2021.01); C08F 12/14 (2013.01); C08F 20/14 (2013.01); H01M 2300/004 (2013.01); H01M 2300/0071 (2013.01); H01M 2300/0082 (2013.01)] 17 Claims
 
1. A solid polymer electrolyte comprising:
a multifunctional acrylate-based polymer;
a C1 to C10 polyalkylene oxide;
a flame-retardant polymer;
a lithium salt; and
a non-aqueous solvent,
wherein the non-aqueous solvent is present in a solid state at room temperature,
wherein the non-aqueous solvent is dimethyl sulfone,
wherein the multifunctional acrylate-based polymer and the polyalkylene oxide form semi-interpenetrating polymer networks (semi-IPN), and the flame-retardant polymer is present blended with the semi-interpenetrating polymer networks, and
wherein 50% by weight or more of solids of the solid polymer electrolyte comprises the multifunctional acrylate-based polymer, the C1 to C10 polyalkylene oxide, the flame-retardant polymer, the lithium salt, and the non-aqueous solvent based on a total weight of the solid polymer electrolyte.
 
17. An all solid-state battery comprising the solid polymer electrolyte according to claim 1.