US 12,237,472 B2
Secondary battery
Akihiro Orita, Tokyo (JP); Yasuhiko Yoshinari, Tokyo (JP); Hideyuki Ogawa, Tokyo (JP); Minoru Hoshino, Tokyo (JP); Masayo Horikawa, Tokyo (JP); Yusuke Sera, Tokyo (JP); Suguru Ueda, Tokyo (JP); and Hiroki Mikuni, Tokyo (JP)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/617,588
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Jun. 9, 2020, PCT No. PCT/JP2020/022702
§ 371(c)(1), (2) Date Dec. 9, 2021,
PCT Pub. No. WO2020/250890, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. PCT/JP2019/023562 (WO), filed on Jun. 13, 2019.
Prior Publication US 2022/0246897 A1, Aug. 4, 2022
Int. Cl. H01M 10/0569 (2010.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/131 (2010.01); H01M 4/38 (2006.01); H01M 4/46 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/58 (2010.01); H01M 4/66 (2006.01); H01M 10/0525 (2010.01); H01M 10/0568 (2010.01)
CPC H01M 10/0569 (2013.01) [H01M 4/0404 (2013.01); H01M 4/131 (2013.01); H01M 4/386 (2013.01); H01M 4/387 (2013.01); H01M 4/463 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/58 (2013.01); H01M 4/661 (2013.01); H01M 10/0525 (2013.01); H01M 10/0568 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); H01M 2300/0028 (2013.01); H01M 2300/0034 (2013.01)] 11 Claims
 
1. A secondary battery comprising:
a positive electrode current collector;
a negative electrode current collector;
a positive electrode electrolytic solution part provided between the positive electrode current collector and the negative electrode current collector so as to be in contact with the positive electrode current collector, the positive electrode electrolytic solution part comprising a positive electrode active material and a positive electrode electrolytic solution; and
a negative electrode electrolytic solution part provided between the positive electrode current collector and the negative electrode current collector so as to be in contact with the negative electrode current collector, the negative electrode electrolytic solution part comprising a negative electrode active material and a negative electrode electrolytic solution,
wherein
the positive electrode electrolytic solution comprises an electrolyte salt and a non-aqueous solvent comprising a first solvent,
the negative electrode electrolytic solution comprises an electrolyte salt and a non-aqueous solvent comprising a second solvent,
the second solvent is a solvent having a reduction potential that is lower than an eigenvalue depending on the negative electrode active material,
the positive electrode electrolytic solution does not comprise the second solvent,
the negative electrode electrolytic solution does not comprise the first solvent, and
the non-aqueous solvent contained in the positive electrode electrolytic solution and the non-aqueous solvent contained in the negative electrode electrolytic solution are different from each other.