Sodium-based Cation-Disordered Rock Salts for High-Performance Na-Ion Battery Cathodes
AssigneeUNM Rainforest Innovations
InventorsDongchang CHEN, Alexandra OUTKA, Basirat RAJI-ADEFILA, You WANG
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Abstract
A cathode for an electrochemical device is described including a sodium-based disordered rock salt which can include a transition metal, such as manganese, iron, or titanium. The electrochemical device can be a sodium-ion battery. The disordered rock salt can either be stoichiometric or an over-stoichiometric. A degree of over-stoichiometry of the disordered rock salt is from 0% to about 100%. The disordered rock salt may include, Na1.1Ti0.2Mn0.7O2, MS10-Na1.1Ti0.2Mn0.7O2, MS20-Na1.1Ti0.2Mn0.7O2, Na1.2Ti0.4Mn0.4O2, MS10-Na1.2Ti0.4Mn0.4O2, Na1.3Ti0.6Mn0.1O2, and MS10-Na1.3Ti0.6Mn0.1O2, or a combination thereof.
Claims20
A cathode for an electrochemical device, comprising:
- a sodium-based cation-disordered rock salt comprising a transition metal.
A sodium-ion battery, comprising:
- a cathode having a cation-disordered rock salt comprising sodium and at least one transition metal;
- and
- an anode;
- and wherein:
- the cation-disordered rock salt is over-stoichiometric.
A method of synthesizing a cation-disordered rock salt cathode for a sodium-ion battery comprising:
- providing at least one compound comprising sodium;
- providing at least one compound comprising a transition metal;
- mixing the compound comprising sodium and the compound comprising a transition metal;
- and
- producing a cation-disordered rock salt cathode.
Dependencies are inferred from the claim text.