Expanded hydrated vanadate
AssigneeUniversity of Washington
InventorsGuozhong Cao, Chaofeng Liu
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Abstract
The present disclosure generally relates to cation-stabilized expanded hydrated vanadates, electrodes made therefrom, and batteries incorporating cathodes made from the cation-stabilized expanded hydrated vanadate.
Claims18
A composition comprising a cationically stabilized vanadate hydrate having the chemical formula MxV2O5·nH2O, wherein M is a cation and having a structure defined by layers of vanadium oxide separated by the cation and water, which provide spacing and stabilization between the layers, wherein the cationically stabilized vanadate hydrate has a greater interplanar spacing when compared to a vanadate hydrate formed by the same method but without the cation, and wherein the interplanar spacing is about 12.9 Å.
An aqueous battery comprising a cathode, the cathode comprising:
- a cationically stabilized vanadate hydrate having a structure defined by layers of vanadium oxide separated by a cation and water, which provide spacing and stabilization between the layers,
- wherein the cathode comprises the chemical formula MxV2O5·nH2O, wherein M is Mn (II),
- wherein the specific capacity is 400 mAh/g at a current density of 0.05 A/g or greater, and
- wherein the battery has a capacity retention of 80% or greater.
Dependencies are inferred from the claim text.