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US 11,114,688 B2Granted
Lithium-ion mixed conductor membrane improves the performance of lithium-sulfur battery and other energy storage devices
AssigneeUniversity of Southern California
InventorsSri R. Narayan, Derek Moy
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Abstract
A lithium ion mixed conduction membrane includes an optional polymeric binder and a partially lithiated ion conductive material having lithium ion conductivity and electrical conductivity dispersed within the polymeric binder that is capable of improving the performance and cycle life of lithium-sulfur rechargeable batteries and other batteries exhibiting the polysulfide shuttle. One or more lithium ion conduction membranes are placed between the positive and negative electrodes, or adjacent to the negative electrode of a battery and in particular, of a lithium sulfur battery.
Claims21
A lithium ion mixed conduction membrane comprising:
- a polymeric binder;
- and
- a lithium ion conductive material having lithium ion conductivity and electrical conductivity dispersed within the polymeric binder, the lithium ion conductive material being partially lithiated in an amount from 35 mole percent to 90 mole percent per mole of lithium in the lithium ion conductive material when the lithium ion conductive material is fully lithiated wherein the lithium ion conductive material is selected from the group consisting of wherein the lithium ion conductive material is selected from the group consisting of LizMnO2, Li2zMnO3, LizCo2O4, LizFeSO4F, LizVPO4F, LizMoS2 and combinations thereof, with z being from 0.3 to 0.9 and wherein the lithium ion conductive is partially lithiated such that the electrode potential of the lithium ion mixed conduction membrane does overlap with the electrode potential range of a sulfur-containing cathode when the lithium ion mixed conduction membrane is positioned in a battery including the sulfur-containing cathode.
A battery comprising:
- a sulfur-containing positive electrode including a sulfur-carbon composite supported on an aluminum foil or grid;
- a negative electrode;
- and
- a mixed conduction membrane interposed between the sulfur-containing positive electrode and the negative electrode, the mixed conduction membrane including
- a polymeric binder;
- and
- a lithium ion conductive material having lithium ion conductivity and electrical conductivity dispersed within the polymeric binder, the lithium ion conductive material being partially lithiated in an amount from 35 mole percent to 90 mole percent per mole of lithium in the lithium ion conductive material when the lithium ion conductive material is fully lithiated and wherein the lithium ion conductive is partially lithiated such that the electrode potential of the mixed conduction membrane does overlap with the electrode potential range of the sulfur-containing positive electrode when the battery is operated, wherein the lithium ion conductive material is selected from the group consisting of LizMnO2, Li2zMnO3, LizCo2O4, LizFeSO4F, LizVPO4F, LizMoS2 and combinations thereof, with z being from 0.3 to 0.9.
4 more elements
A battery comprising:
- a positive electrode;
- a negative electrode;
- and
- a first mixed conduction membrane interposed between the positive electrode and the negative electrode;
- a second mixed conduction membrane interposed between the first mixed conduction membrane and the negative electrode, the second mixed conduction membrane including a partially or fully lithiated ion conductive material;
- a first electrolyte layer interposed between the positive electrode and the first mixed conduction membrane;
- a second electrolyte layer interposed between the first mixed conduction membrane and the first mixed conduction membrane, wherein the first mixed conduction membrane includes:
- an polymeric binder;
- and
- a lithium ion conductive material having lithium ion conductivity and electrical conductivity dispersed within the polymeric binder, the lithium ion conductive material being partially lithiated in an amount from 35 mole percent to 90 mole percent per mole of lithium in the lithium ion conductive material when the lithium ion conductive material is fully lithiated, wherein the lithium ion conductive is partially lithiated such that the electrode potential of the first mixed conduction membrane does overlap with the electrode potential range of a sulfur-containing cathode when the battery is operated, wherein the lithium ion conductive material is selected from the group consisting of LizMnO2, Li2zMnO3, LizCo2O4, LizFeSO4F, LizVPO4F, LizMoS2 and combinations thereof, with z being from 0.3 to 0.9.
7 more elements
Dependencies are inferred from the claim text.