US 12,142,760 B2
Cathode active material for all-solid-state battery comprising coating layer including ternary oxide and method of manufacturing same
A Reum Ha, Ulsan (KR); Ju Yeong Seong, Suwon-si (KR); Yong Gu Kim, Suwon-si (KR); In Woo Song, Gwacheon-si (KR); Hong Seok Min, Yongin-si (KR); Yong Sub Yoon, Seoul (KR); Yun Sung Kim, Seoul (KR); Sung Woo Noh, Seoul (KR); Yong Jun Jang, Seoul (KR); Sang Heon Lee, Seongnam-si (KR); Jae Phil Cho, Yongin-si (KR); and Hyo Myoung Lee, Ulsan (KR)
Assigned to HYUNDAI MOTOR COMPANY, Seoul (KR); KIA CORPORATION, Seoul (KR); and ULSAN National Institute of Science and Technology, Ulsan (KR)
Filed by HYUNDAI MOTOR COMPANY, Seoul (KR); KIA CORPORATION, Seoul (KR); and Ulsan National Institute of Science and Technology, Ulsan (KR)
Filed on May 26, 2021, as Appl. No. 17/331,269.
Claims priority of application No. 10-2020-0110731 (KR), filed on Sep. 1, 2020.
Prior Publication US 2022/0069298 A1, Mar. 3, 2022
Int. Cl. H01M 4/525 (2010.01); H01M 4/04 (2006.01); H01M 4/131 (2010.01); H01M 4/1391 (2010.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/505 (2010.01)
CPC H01M 4/525 (2013.01) [H01M 4/0416 (2013.01); H01M 4/131 (2013.01); H01M 4/1391 (2013.01); H01M 4/366 (2013.01); H01M 4/382 (2013.01); H01M 4/505 (2013.01)] 1 Claim
OG exemplary drawing
 
1. A cathode active material for an all-solid-state battery, the cathode active material comprising:
active material particles comprising a compound represented by Chemical Formula 1 below; and
a coating layer covering at least a portion of a surface of the active material particles, and comprising lithium oxide represented by Chemical Formula 2 below:
LixVyNbwNi1-a-bCOaMbO2,  [Chemical Formula 1]
wherein in Chemical Formula 1,
M is at least one element selected from a group consisting of manganese (Mn), aluminum (Al), magnesium (Mg) and combinations thereof, and
x, y, w, a and b are 0.98≤x≤1.02, 0<y≤0.01, 0<w≤0.8, 0<a≤0.1 and 0≤b≤0.1, respectively,
LiNbcVdO3,  [Chemical Formula 2]
wherein in Chemical Formula 2,
c and d are 0<c≤0.8 and 0<d≤0.01, respectively,
wherein the active material particles and the coating layer comprise niobium (Nb) and vanadium (V), and wherein vanadium (V) is contained in the cathode active material in a concentration of 5,400 ppm to 8,600 ppm, and wherein the niobium (Nb) is contained in the cathode active material in a concentration of 11,230 ppm to 12,000 ppm.