US 12,418,042 B2
Cathode for all-solid-state battery for preventing short-circuiting between electrodes and method of manufacturing the same
Yong Gu Kim, Suwon-si (KR); Yun Sung Kim, Seoul (KR); Ji Na Kim, Uiwang-si (KR); Sa Heum Kim, Suwon-si (KR); and Hong Seok Min, Yongin-si (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and KIA MOTORS CORPORATION, Seoul (KR)
Filed by HYUNDAI MOTOR COMPANY, Seoul (KR); and KIA MOTORS CORPORATION, Seoul (KR)
Filed on Sep. 2, 2020, as Appl. No. 17/010,295.
Claims priority of application No. 10-2019-0114022 (KR), filed on Sep. 17, 2019.
Prior Publication US 2021/0083322 A1, Mar. 18, 2021
Int. Cl. H01M 4/139 (2010.01); H01M 4/36 (2006.01); H01M 4/66 (2006.01); H01M 10/0525 (2010.01); H01M 10/0562 (2010.01); H01M 10/058 (2010.01)
CPC H01M 10/0562 (2013.01) [H01M 4/139 (2013.01); H01M 4/366 (2013.01); H01M 4/661 (2013.01); H01M 10/0525 (2013.01); H01M 10/058 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method of manufacturing a cathode for an all-solid-state battery, the method comprising:
stacking a protective member on a cathode current collector, the protective member including a protective layer and a mask layer disposed on the protective layer and having a central portion which is an empty space;
coating the protective member with a cathode material so that the central portion of the protective member is filled with the cathode material;
removing the mask layer to form a cathode coating layer; and
pressurizing the cathode coating layer,
punching the protective layer, the cathode coating layer, and the cathode current collector after removing the mask layer,
wherein an insulating layer is formed through the punching against the protective layer,
wherein the cathode coating layer has a thickness of 80 to 115 μm,
wherein an adhesive layer is interposed between the cathode current collector and the protective member,
wherein the adhesive layer includes any one selected from the group consisting of an ethylene vinyl acetate (EVA) copolymer, polyvinyl acetate (PVA), polyethylene (PE), amorphous polypropylene, a thermoplastic elastomer, polyamide, polyester, and combinations thereof,
wherein the insulating layer has a circular shape with an inner diameter Øx and an outer diameter Øy, and
wherein the inner diameter Øx and the outer diameter Øy of the insulating layer satisfy Expression 1 below:
1.1Øx≤Øy≤2.0Øx.  [Expression 1]