Electrolyte composition, and sodium secondary battery employing the same

Patent metadata

Field	Value
Publication number	US-10177412-B2
Application number	US-201514950910-A
Country	US
Kind code	B2
Filing date	Nov 24, 2015
Priority date	Aug 21, 2015
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

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.

First claim

What is claimed is:

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 NaPF 6 , NaBF 4 , NaClO 4 , NaBr, NaCl, or a combination thereof.

10. The sodium secondary battery as claimed in claim 1 , wherein the sodium salt comprises NaHCO 3 , NaNO 3 , CH 3 COONa, C 6 H 4 (OH)COONa, or a combination thereof.

Assignees

• Ind Tech Res Inst

Inventors

• Hung Tai-Feng
• Yeh Yu-Wen
• Chang Wen-Sheng
• Yang Chang-Chung
• Chang Che-Wei

Classifications

• H01M50/417

  Polyolefins · CPC title

• H01M50/437

  Glass · CPC title

• H01M4/485

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title

• H01M2/1626

  Electricity · mapped topic

• H01M10/0569

  characterised by the solvents · CPC title