US 11,929,508 B2
Electrode for secondary battery
Hyo Mi Kim, Daejeon (KR); and Kwang Ho Jeong, Daejeon (KR)
Assigned to SK On Co., Ltd., Seoul (KR)
Filed by SK On Co., Ltd., Seoul (KR)
Filed on Mar. 2, 2022, as Appl. No. 17/684,570.
Application 17/684,570 is a continuation of application No. 17/375,055, filed on Jul. 14, 2021.
Claims priority of application No. 10-2020-0087785 (KR), filed on Jul. 15, 2020.
Prior Publication US 2022/0271292 A1, Aug. 25, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/62 (2006.01); H01M 4/02 (2006.01); H01M 4/36 (2006.01); H01M 10/052 (2010.01)
CPC H01M 4/622 (2013.01) [H01M 4/366 (2013.01); H01M 10/052 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An electrode for a secondary battery, comprising:
a current collector;
a first electrode mixture layer disposed on at least one surface of the current collector and including a first styrene-butadiene rubber; and
a second electrode mixture layer disposed on the first electrode mixture layer and including a second styrene-butadiene rubber,
wherein the first styrene-butadiene rubber and the second styrene-butadiene rubber include a repeating unit of a styrene-derived structure and a repeating unit of a butadiene-derived structure,
the first styrene-butadiene rubber contains 40 to 90 mol % of a butadiene monomer based on a total content of a monomer, and
the second styrene-butadiene rubber has a lower content of a butadiene monomer than the content of the first styrene-butadiene rubber.