US 11,949,095 B2
Composite solid electrolyte, electrochemical cell including the same, and method of preparing the composite solid electrolyte
Wonsung Choi, Hwaseong-si (KR); Dongjoon Lee, Suwon-si (KR); Hyunpyo Lee, Seoul (KR); and Kyounghwan Choi, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Sep. 29, 2020, as Appl. No. 17/036,368.
Claims priority of application No. 10-2019-0168143 (KR), filed on Dec. 16, 2019.
Prior Publication US 2021/0184201 A1, Jun. 17, 2021
Int. Cl. H01M 4/134 (2010.01); H01M 4/04 (2006.01); H01M 4/1391 (2010.01); H01M 4/1395 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/1395 (2013.01) [H01M 4/0404 (2013.01); H01M 4/0471 (2013.01); H01M 4/134 (2013.01); H01M 4/1391 (2013.01); H01M 10/0525 (2013.01); H01M 2300/0037 (2013.01); H01M 2300/0071 (2013.01); H01M 2300/0094 (2013.01)] 37 Claims
OG exemplary drawing
 
1. A composite solid electrolyte comprising:
a solid electrolyte having a NASICON type crystal structure and including elements of Li, Ti, Al, P, and 0; and
a protective layer, wherein the protective layer is on a surface of the solid electrolyte and comprises a compound represented by Formula 1
LixMlyM2zOt+x/2   Formula 1
wherein in Formula 1,
M1 has a Gibbs reaction energy of greater than 0 electron-volts per mole,
M2 is Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Ga, Ge, Si, Al, W, Cd, Pd, Sn, Pb, Sc, Mg, Ca, Sr, Ba, or a combination thereof,
0<x<1, 0<y<1, 0<z<1, and 0<t<1,
provided that when M1 is Nb and z is 0, the compound represented by Formula 1 is Li0.33Nb0.33O, and when M1 is Zr or Al, z≠0.