Electrolyte composition, and sodium secondary battery employing the same

• US 10,177,412 B2
• Filed: 11/24/2015
• Issued: 01/08/2019
• Est. Priority Date: 08/21/2015
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Hung, Tai-Feng, Yeh, Yu-Wen, Chang, Wen-Sheng, Yang, Chang-Chung, Chang, Che-Wei
• Primary Examiner(s): Weiner, Laura
• Application Number:
  US14/950,910
• Publication Number:
  US 20170054177A1
• Time in Patent Office: 1,141 Days
• CPC Class Codes: H01M 10/054 Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
• CPC Class Codes: H01M 10/0568 characterised by the solutes
• CPC Class Codes: H01M 10/0569 characterised by the solvents
• CPC Class Codes: H01M 2300/0028 characterised by the solvent
• CPC Class Codes: H01M 4/485 of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy H01M4/505, H01M4/525 take precedence
• CPC Class Codes: H01M 4/505 of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
• CPC Class Codes: H01M 4/5825 Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
• CPC Class Codes: H01M 50/4295 Natural cotton, cellulose or wood
• CPC Class Codes: H01M 50/44 Fibrous material
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

An electrolyte composition and a sodium secondary battery are provided. The electrolyte composition includes an alcohol compound and a metallic salt, wherein the metallic salt consists of a sodium salt formed. The sodium secondary battery includes the electrolyte composition, a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode.

Claims

1. A sodium secondary battery, comprising:

a positive electrode;

a negative electrode;

a separator, disposed between the positive electrode and the negative electrode; and

an electrolyte composition, wherein the electrolyte composition consists of an alcohol compound; and

a metallic salt, wherein the metallic salt consists of a sodium salt, and wherein the molar ratio of the alcohol compound to the sodium salt is between 3;

1 and 48;

1.

2. The sodium secondary battery as claimed in claim 1, wherein the positive electrode comprises sodium-containing oxide, sodium-containing ferrocyanide, or sodium phosphate.

3. The sodium secondary battery as claimed in claim 1, wherein the negative electrode comprises metal oxide, or sodium phosphate.

4. The sodium secondary battery as claimed in claim 1, wherein the separator comprises glass fiber film, filter paper, polypropylene polymer film, polyethylene polymer film, or a combination thereof.

5. The sodium secondary battery as claimed in claim 1, wherein the alcohol compound comprises mono-alcohol, diol, triol, or a combination thereof.

6. The sodium secondary battery as claimed in claim 5, wherein the mono-alcohol comprises ethanol.

7. The sodium secondary battery as claimed in claim 5, wherein the diol comprises diethylene glycol, triethylene glycol, tetraethylene glycol, ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,5-pentanediol, or a combination thereof.

8. The sodium secondary battery as claimed in claim 5, wherein the triol comprises glycerol.

9. The sodium secondary battery as claimed in claim 1, wherein the sodium salt comprises NaPF₆, NaBF₄, NaClO₄, NaBr, NaCl, or a combination thereof.

10. The sodium secondary battery as claimed in claim 1, wherein the sodium salt comprises NaHCO₃, NaNO₃, CH₃COONa, C₆H₄(OH)COONa, or a combination thereof.