Rechargeable anode-free sodium metal batteries enabled by non-porous sodium metal plating and stripping
AssigneeWashington University
InventorsPeng BAI, Bingyuan MA, Youngju LEE
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Abstract
The present disclosure is directed to a rechargeable anode-free sodium metal battery including: a cathode substrate; a cathode nanomaterial deposited onto the cathode substrate; a nonaqueous electrolyte, wherein a total water content of the non-aqueous electrolyte is about 10 ppm or less; and an anode substrate, wherein the anode substrate has no deposited material prior to battery recharge, and wherein the anode substrate comprises an ingot-type, non-porous sodium metal surface formed during battery recharge.
Claims20
A rechargeable anode-free sodium metal battery comprising:
- a cathode substrate;
- a cathode nanomaterial deposited onto the cathode substrate;
- a nonaqueous electrolyte, wherein a total water content of the nonaqueous electrolyte is about 10 ppm or less;
- and
- an anode substrate, wherein the anode substrate has no deposited material prior to battery recharge, and wherein the anode substrate comprises an ingot-type, non-porous sodium metal surface formed during battery recharge.
A method for fabricating a rechargeable anode-free sodium metal battery, the method comprising:
- depositing sodium metal onto an anode substrate during battery recharge from a nonaqueous electrolyte, wherein a total water content of the nonaqueous electrolyte is about 10 ppm or less;
- and
- forming on the anode substrate a continuous, crevice-free, shiny-smooth, non-dendritic, and non-porous sodium metal surface.
A method for characterizing interfacial stability of an electrode, the method comprising:
- filling a transparent capillary cell with nonaqueous electrolyte, wherein a total water content of the nonaqueous electrolyte is about 10 ppm or less;
- adding sodium metal to the transparent capillary cell;
- and
- applying one-way electroplating with at least one rest.
Dependencies are inferred from the claim text.