Rechargeable calcium battery

Patent metadata

Field	Value
Publication number	US-12476286-B2
Application number	US-202217723677-A
Country	US
Kind code	B2
Filing date	Apr 19, 2022
Priority date	Apr 19, 2021
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

A rechargeable calcium battery formed from a calcium metal anode, a cathode formed from a composite carbon/sulfur (C/S), a metal oxide, or a metal sulfide, and a multi-component electrolyte containing a mixture of different salts. The calcium anode is formed as a thin, pure calcium metal foil that is polished and combined with a copper collector for redox activity. The cathode may be formed from a carbon-sulfur (CS) composite or metal oxide/sulfide, such as CaM x O y or CaM x S y , or formed from binary and ternary metals, such as CaM1aM2bO y /S y and CaM 1a M 2b M 3c O y /S y . The battery also includes a multi-component electrolyte including calcium salts, such as Ca(TSFI) 2 , Ca(ClO 4 ) 2 , Ca(BF 4 ) 2 , and CaPF 6 , or the pairing of lithium, sodium and potassium salts with one of the anions, such as Ca(TFSI), NaPF 6 , and Li(TFSI).

First claim

What is claimed is:

1 . A rechargeable battery, comprising: an anode formed from a polished calcium metal foil;
a cathode formed from a material selected from the group consisting of a carbon-sulfide composite, a metal oxide, a transition metal oxide or sulfide, a binary metal oxide or sulfide, and a ternary metal oxide sulfide; and an electrolyte comprising an aprotic solvent and a cation salt selected from the group consisting of a calcium salt, a lithium salt, a sodium salt, or a potassium salt.

2 . The rechargeable battery of claim 1 , further comprising a copper collector.

3 . The rechargeable battery of claim 2 , wherein the anode is microporous.

4 . The rechargeable battery of claim 2 , wherein the anode includes a mesh support.

5 . The rechargeable battery of claim 1 , wherein the material forming the cathode is CaM 1a M 2b O y /S y , wherein M 1a is a first transition metal and M 2b is a second transition metal and a, b, and y represent stoichiometric coefficients.

6 . The rechargeable battery of claim 1 , wherein the material forming the cathode is CaM 1a M 2b M 3c O y /S y , wherein M 1a is a first transition metal, M 2b is a second transition metal and M 3c is a third transition metal and a, b, c, and y represent stoichiometric coefficients.

7 . The rechargeable battery of claim 1 , wherein the material forming the cathode is CaNiMnCoO 2 .

8 . The rechargeable battery of claim 1 , wherein the calcium salt is selected from the group consisting of Ca(TSFI) 2 , Ca(CIO 4 ) 2 , Ca(BF 4 ) 2 , and CaPF 6 .

9 . The rechargeable battery of claim 1 , wherein the calcium salt is selected from the group consisting of Ca(trifluoromethanesulfonylimide) 2 , NaPF 6 , and Li(trifluoromethanesulfonylimide).

10 . The rechargeable battery of claim 1 , wherein the aprotic solvent is a carbonate.

11 . The rechargeable battery of claim 1 , wherein the aprotic solvent is selected from the group consisting of ethyl carbonate, dimethyl carbonate, ethyl methyl carbonate, diethyl carbonate, acetonitrile, dimethyl fumarate, tetrahydrofuran.

12 . The rechargeable battery of claim 10 , wherein the aprotic solvent is a binary compound selected from the group consisting of ethyl carbonate/dimethyl carbonate, ethyl carbonate/ethyl methyl carbonate, ethyl carbonate/diethyl carbonate, and ethyl carbonate/propylene carbonate.

13 . The rechargeable battery of claim 10 , wherein the aprotic solvent is ethyl carbonate/dimethyl carbonate/ethyl methyl carbonate.

14 . The rechargeable battery of claim 1 , wherein the aprotic solvent is an ionic liquid solvent selected from the group consisting of an alkyl imidazolium alkylsulfonate paired ionic liquid, 1-ethyl-3-methylimidazolium trifluoromethanesulfonate, 1-ethyl-3-methylimidazolium methanesulfonate, and 1-butyl-3-methylimidazolium trifluoromethanesulfonate.

Assignees

• Hosein Ian
• Univ Syracuse

Inventors

• Hosein Ian

Classifications

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M10/0568

  characterised by the solutes · CPC title

• H01M10/0569

  characterised by the solvents · CPC title

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title

• H01M4/661

  Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence) · CPC title