Lithium-rich aluminum iron sulfide Li-ion battery cathodes
AssigneeCalifornia Institute of Technology
InventorsEshaan S. Patheria, Kimberly A. Robb
Life of this patent
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Abstract
Provided herein are compositions, devices, electrochemical systems, and methods relating to lithium-rich iron sulfide lithium-ion battery cathodes. In one embodiment, a composition may be characterized by formula FX1: Liw-δAlxFezS2. In some embodiments, w may be greater than or equal to 2 and less than or equal to 2.5. In some embodiments, x may be greater than 0 and less than or equal to 0.5. In some embodiments, z may be greater than 0 and less than or equal to 1. In some embodiments, δ may be greater than or equal to 0 and less than w. In some embodiments, the composition may have a net charge of 0.
Claims26
A composition characterized by formula FX1:
- Li
- w
- -
- δ
-
- Al
- x
-
- Fe
- z
-
- S
- 2
- ;
- (
- FX1
- )
- wherein w is greater than or equal to 2 and less than or equal to 2.5;
- wherein x is greater than 0 and less than or equal to 0.5;
- wherein z is greater than or equal to 0 and less than or equal to 1;
- wherein δ is greater than or equal to 0 and less than w;
- and
- wherein the composition has an average net charge of 0.
An electrochemical system comprising:
- a cathode comprising a composition characterized by formula FX1:
- Li
- w
- -
- δ
-
- Al
- x
-
- Fe
- z
-
- S
- 2
- ;
- (
- FX1
- )
- wherein w is greater than or equal to 2 and less than or equal to 2.5;
- wherein x is greater than 0 and less than or equal to 0.5;
- wherein z is greater than 0 and less than or equal to 1;
- wherein δ is greater than or equal to 0 and less than w;
- and
- wherein the composition has an average net charge of 0.
A cathode of an electrochemical system, the cathode comprising:
- a composition characterized by formula FX1:
- Li
- w
- -
- δ
-
- Al
- x
-
- Fe
- z
-
- S
- 2
- ;
- (
- FX1
- )
- wherein w is greater than or equal to 2 and less than or equal to 2.5;
- wherein x is greater than 0 and less than or equal to 0.5;
- wherein z is greater than 0 and less than or equal to 1;
- wherein δ is greater than or equal to 0 and less than w;
- and
- wherein the composition has an average net charge of 0.
A method of making a composition, the method comprising:
- providing a first amount of Li2FeS2 and a second amount of Li2.5Al0.5S2;
- combining the first amount of Li2FeS2 and the second amount of Li2.5Al0.5S2, thereby forming a combination;
- and
- heating the combination to form the combination having a lithium iron aluminum sulfide composition;
- wherein the lithium iron aluminum sulfide composition is characterized by formula FX1:
- Li
- w
- -
- δ
-
- Al
- x
-
- Fe
- z
-
- S
- 2
- ;
- (
- FX1
- )
- wherein w is greater than or equal to 2 and less than or equal to 2.5;
- wherein x is greater than 0 and less than or equal to 0.5;
- wherein z is greater than 0 and less than or equal to 1;
- wherein δ is greater than or equal to 0 and less than w;
- and
- the lithium iron aluminum sulfide composition has a net charge of 0.
A method of making a composition, the method comprising:
- providing a first amount of Li2S, a second amount of FeS, and a third amount of Al2S3;
- combining the first amount of Li2S, the second amount of FeS, and the third amount of Al2S3, thereby forming a combination;
- and
- heating the combination to form the composition having a lithium iron aluminum sulfide composition;
- wherein the lithium iron aluminum sulfide composition is characterized by formula FX1:
- Li
- w
- -
- δ
-
- Al
- x
-
- Fe
- z
-
- S
- 2
- ;
- (
- FX1
- )
- wherein w is greater than or equal to 2 and less than or equal to 2.5;
- wherein x is greater than 0 and less than or equal to 0.5;
- wherein z is greater than 0 and less than or equal to 1;
- wherein δ is greater than or equal to 0 and less than w;
- and
- the lithium iron aluminum sulfide composition has a net charge of 0.
Dependencies are inferred from the claim text.