US 11,996,539 B2
Secondary battery electrode, and method for producing same
Jonghyuk Lee, Daejeon (KR); Dockyoung Yoon, Daejeon (KR); and Heegyoung Kang, Daejeon (KR)
Assigned to SK ON CO., LTD., Seoul (KR)
Appl. No. 16/980,615
Filed by SK INNOVATION CO., LTD., Seoul (KR)
PCT Filed Mar. 15, 2019, PCT No. PCT/KR2019/003006
§ 371(c)(1), (2) Date Sep. 14, 2020,
PCT Pub. No. WO2019/177409, PCT Pub. Date Sep. 19, 2019.
Claims priority of application No. 10-2018-0030070 (KR), filed on Mar. 15, 2018; and application No. 10-2019-0029127 (KR), filed on Mar. 14, 2019.
Prior Publication US 2021/0020898 A1, Jan. 21, 2021
Int. Cl. H01M 4/04 (2006.01); H01M 4/131 (2010.01); H01M 4/133 (2010.01); H01M 4/134 (2010.01); H01M 4/1391 (2010.01); H01M 4/1393 (2010.01); H01M 4/1395 (2010.01); H01M 4/36 (2006.01); H01M 4/62 (2006.01); H01M 4/66 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/0433 (2013.01) [H01M 4/0471 (2013.01); H01M 4/131 (2013.01); H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 4/1391 (2013.01); H01M 4/1393 (2013.01); H01M 4/1395 (2013.01); H01M 4/364 (2013.01); H01M 4/366 (2013.01); H01M 4/623 (2013.01); H01M 4/667 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of producing an electrode for a lithium secondary battery, the method comprising:
a cutting step of slicing an active material bulk to produce an active material film; and
a binding step of integrating a current collector and the active material film,
wherein the lithium secondary battery has a structure in which the active material film has open pore channels on a cross section in a thickness direction, and the open pore channels penetrate the active material film, and
wherein the active material film has an apparent porosity of 10 to 45%,
wherein an electrode active material in the active material bulk has an orientation that is substantially parallel to the thickness direction of the active material film, and the orientation of the electrode active material in the active material film is controlled by a cutting direction in the cutting step.