US 12,482,862 B2
Ni based lithium-ion secondary battery comprising a fluorinated electrolyte
JiHye Kim, Cheonan (KR); Jens Paulsen, Cheonan (KR); AReum Park, Cheonan (KR); Dae-Hyun Kim, Cheonan (KR); Hee-Sung Gil, Cheonan (KR); Jean-Sébastien Bridel, Cheonan (KR); Ji-Hye Won, Brussels (BE); Moon-Hyung Choi, Brussels (BE); Mi-Soon Oh, Brussels (BE); Hyuncheol Lee, Brussels (BE); Lawrence Alan Hough, Brussels (BE); and Hae-Young Kim, Brussels (BE)
Assigned to UMICORE, Brussels (BE); and SYENSQO SA, Brussels (BE)
Appl. No. 17/051,294
Filed by UMICORE, Brussels (BE); and SYENSQO SA, Brussels (BE)
PCT Filed May 2, 2019, PCT No. PCT/EP2019/061195
§ 371(c)(1), (2) Date Oct. 28, 2020,
PCT Pub. No. WO2019/211357, PCT Pub. Date Nov. 7, 2019.
Claims priority of application No. 18170729 (EP), filed on May 4, 2018.
Prior Publication US 2021/0234200 A1, Jul. 29, 2021
Int. Cl. H01M 10/0568 (2010.01); H01M 10/0525 (2010.01); H01M 10/0569 (2010.01)
CPC H01M 10/0568 (2013.01) [H01M 10/0525 (2013.01); H01M 10/0569 (2013.01); H01M 2300/0034 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A liquid electrolyte lithium secondary battery cell comprising:
a positive electrode material comprising a lithium transition metal-based oxide powder having a general formula
Li1+a((Niz (Ni0.5Mn0.5)y COx)1−k Ak)1−a O2, wherein A is a dopant, −0.025≤a≤0.025, 0.18≤x≤0.22, 0.42≤z≤0.52, 1.075<z/y<1.625, x+y+z=1 and k<0.01; and
an electrolyte composition comprising:
a) at least one cyclic carbonate, wherein the at least one cyclic carbonate is propylene carbonate,
b) monofluoroethylene carbonate,
c) at least one fluorinated acyclic carboxylic acid ester, wherein the at least one fluorinated acyclic carboxylic acid ester is 2,2-difluoroethyl acetate,
d) at least one electrolyte salt, wherein the at least one electrolyte salt is lithium hexafluorophosphate (LiPFO),
e) at least one lithium compound, wherein the at least one lithium compound is lithium bis(oxalato)borate,
f) at least one cyclic sulfur compound, wherein the at least one cyclic sulfur compound is 1,3,2-dioxathiolane 2,2-dioxide, and
g) at least one cyclic carboxylic acid anhydride, wherein the at least one cyclic carboxylic acid anhydride is maleic anhydride.