US 12,244,002 B2
Solid-state positive electrode, method of manufacture thereof, and battery including the electrode
Qingsong Tu, Berkeley, CA (US); Tan Shi, Berkeley, CA (US); Gerbrand Ceder, Berkeley, CA (US); and Lincoln Miara, Lincoln, MA (US)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do (KR); and THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, Oakland, CA (US)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR); and The Regents of the University of California, Oakland, CA (US)
Filed on Jun. 15, 2021, as Appl. No. 17/348,326.
Application 17/348,326 is a continuation of application No. 16/459,896, filed on Jul. 2, 2019, granted, now 11,108,035.
Claims priority of provisional application 62/823,509, filed on Mar. 25, 2019.
Claims priority of provisional application 62/789,812, filed on Jan. 8, 2019.
Prior Publication US 2021/0313561 A1, Oct. 7, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/36 (2006.01); H01M 4/02 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01)
CPC H01M 4/362 (2013.01) [H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A solid-state lithium battery comprising:
a positive electrode;
a negative electrode; and
a second solid electrolyte between the positive electrode and the negative electrode, wherein the positive electrode comprises:
a positive active material; and
a first solid electrolyte comprising a sulfide solid electrolyte, wherein a ratio λ of an average particle diameter of the positive active material to an average particle diameter of the first solid electrolyte is
5.5≤λ≤20,
wherein the first solid electrolyte has an average particle diameter of greater than 1.5 μm and less than or equal to 4 μm, and a porosity of the positive electrode is 1% to 10%, based on a total volume of the positive electrode;
wherein the second electrolyte is a garnet-type material; and
wherein the positive active material comprises a lithium transition metal oxide of the formula
LixNiyEzGaO2
wherein 0.90≤x≤1.8, 0≤y≤0.9, 0≤z≤0.5, 0.001<d≤0.5, the sum of y, z, and d is 1, y+z≠0, E is Co, and G is Al, Cr, Fe, Mg, La, Ce, Sr, V, or a combination thereof.
 
10. A solid-state lithium battery consisting of:
a positive electrode;
a negative electrode; and
a second solid electrolyte between the positive electrode and the negative electrode, wherein the positive electrode consists of:
a positive active material; and
a first solid electrolyte which is a sulfide solid electrolyte, wherein a ratio λ of an average particle diameter of the positive active material to an average particle diameter of the first solid electrolyte is
5.5≤λ≤20,
wherein the first solid electrolyte has an average particle diameter of greater than 1.5 μm and less than or equal to 4 μm, and a porosity of the positive electrode is 1% to 10%, based on a total volume of the positive electrode;
wherein the second electrolyte is a garnet-type material; and
wherein the positive active material is a lithium transition metal oxide of the formula
LixNiyEzGaO2
wherein 0.90≤x≤1.8, 0≤y≤0.9, 0≤z≤0.5, 0.001<d≤0.5, the sum of y, z, and d is 1, y+z≠0, E is Co, and G is Al, Cr, Fe, Mg, La, Ce, Sr, V, or a combination thereof.