US 12,244,017 B2
Binder for negative electrode of lithium secondary battery and negative electrode for lithium secondary battery including the same
Chan-Soo Jun, Daejeon (KR); Young-Jae Kim, Daejeon (KR); Ye-Lin Kim, Daejeon (KR); and Jung-Woo Yoo, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/607,699
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Sep. 3, 2020, PCT No. PCT/KR2020/011894
§ 371(c)(1), (2) Date Oct. 29, 2021,
PCT Pub. No. WO2021/060737, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 10-2019-0116992 (KR), filed on Sep. 23, 2019.
Prior Publication US 2022/0216479 A1, Jul. 7, 2022
Int. Cl. H01M 4/134 (2010.01); H01M 4/38 (2006.01); H01M 4/48 (2010.01); H01M 4/62 (2006.01); H01M 10/052 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/622 (2013.01) [H01M 4/386 (2013.01); H01M 4/48 (2013.01); H01M 10/052 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A negative electrode for a lithium secondary battery, which comprises:
negative electrode active material particles,
a conductive material, and
a binder,
wherein the binder comprises:
a copolymer comprising acrylamide monomer-derived repeating units, acrylic acid monomer-derived repeating units, sodium acrylate monomer-derived repeating units and acrylonitrile monomer-derived repeating units,
wherein the copolymer comprises 60 wt % to 65 wt % of acrylamide monomer-derived repeating units, 5 wt % to 10 wt % of acrylic acid monomer-derived repeating units, 15 wt % to 25 wt % of sodium acrylate monomer-derived repeating units and 5 wt % to 15 wt % of acrylonitrile monomer-derived repeating units,
wherein a combined weight of the acrylic acid monomer-derived repeating units and sodium acrylate monomer-derived repeating units in the copolymer is 25 wt % to 35 wt %, and
wherein the negative electrode active material particles are silicon-based negative electrode active material particles.