US 11,901,544 B2
Ion conductor, and positive electrode, solid electrolyte, and lithium battery each including the ion conductor, and method of preparing the ion conductor
Sangbok Ma, Suwon-si (KR); and Donghwa Seo, Burlington, MA (US)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on May 18, 2020, as Appl. No. 16/876,605.
Claims priority of provisional application 62/942,506, filed on Dec. 2, 2019.
Claims priority of application No. 10-2019-0160966 (KR), filed on Dec. 5, 2019.
Prior Publication US 2021/0167356 A1, Jun. 3, 2021
Int. Cl. H01M 4/131 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/36 (2006.01); H01M 4/04 (2006.01); H01M 10/0525 (2010.01); H01M 10/0562 (2010.01); H01M 4/1391 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/131 (2013.01) [H01M 4/0471 (2013.01); H01M 4/1391 (2013.01); H01M 4/364 (2013.01); H01M 4/366 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); H01M 10/0562 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An ion conductor comprising:
at least one oxide represented by Formulae 1 to 3
Li4±xM1−x′M′x′O4   Formula 1
wherein in Formula 1,
0≤x≤1 and 0≤x′≤1 ,
M is Zr, Hf, or a combination thereof, and
M′ is Y, Al, Ta, Mg, Zn, or a combination thereof,
with the proviso that when M is Zr, then x≠0, and M′ is Ta, or a combination of Y and Ta;
Li4−yM″O4−yA′y   Formula 2
wherein in Formula 2,
0≤y≤1,
M″ is a Group 4 element, and
A′ may include at least one halogen;
Li4+4zM′″1−zO4   Formula 3
wherein in Formula 3,
0<z<1, and
M″′ is a Group 4 element,
wherein the ion conductor has an ionic conductivity of about 2×10−7 mS/cm or more at about 60° C.
 
19. A method of preparing an ion conductor, the method comprising:
providing at least one oxide represented by Formulae 1 to 3 to form a precursor mixture
Li4±xM1−x′M′x′O4   Formula 1
wherein in Formula 1,
0≤x≤1 and 0≤x′≤1 ,
M is Zr, Hf, or a combination thereof,
M′ is Y, Al, Ta, Mg, Zn, or a combination thereof, with the proviso that when M is Zr, then x≠0, and M′ is Ta, or a combination of Y and Ta;
Li4−yM″O4−yA′y   Formula 2
wherein in Formula 2,
0≤y≤1,
M″ is a Group 4 element,
A′ includes at least one halogen;
Li4+4zM′″1−zO4   Formula 3
wherein in Formula 3,
0<z<1,
M″′ is a Group 4 element; and
heat-treating the precursor mixture in the oxidizing atmosphere, a reducing atmosphere, or a combination thereof,
wherein the ion conductor has an ionic conductivity of about 2×10−7 mS/cm or more at about 60° C.