Electrolyte and compound for the electrolyte and capacitor

Patent metadata

Field	Value
Publication number	US-11807601-B2
Application number	US-202017131356-A
Country	US
Kind code	B2
Filing date	Dec 22, 2020
Priority date	Oct 23, 2020
Publication date	Nov 7, 2023
Grant date	Nov 7, 2023

Abstract

An electrolyte is provided, which includes organic solvent; and (1) a compound and an ammonium salt thereof, (2) a diacid and an ammonium salt thereof, or (3) a combination thereof. The compound has a chemical structure ofwherein R1 is C1-8 alkyl group, C1-8 alkenyl group, C1-8 alkynyl group, or aromatic group; and R2 is —(CnH2n)—OH, and n is an integer from 2 to 8. The diacid has a chemical structure ofwherein R3 is C1-8 alkyl group, C1-8 alkenyl group, C1-8 alkynyl group, or aromatic group.

First claim

What is claimed is:

1. A compound used in an electrolyte, having a chemical structure of:

wherein R 1 is C 1-8 alkyl group, C 1-8 alkenyl group, C 1-8 alkynyl group, or aromatic group, R 2 is —(C n H 2n )—OH, and n is an integer from 2 to 8.

2. The compound used in the electrolyte as claimed in claim 1 , wherein R 1 is a methyl group or a tert-butyl group, and n is 2.

3. An electrolyte, comprising:
an organic solvent; and
(1) a compound and an ammonium salt thereof; or a combination of (1) the compound and the ammonium salt thereof and (2) a diacid and an ammonium salt thereof, wherein the compound has a chemical structure of

wherein R 1 is C 1-8 alkyl group, C 1-8 alkenyl group, C 1-8 alkynyl group, or aromatic group; and R 2 is —(C n H 2n )—OH, and n is an integer from 2 to 8; wherein the diacid has a chemical structure of:

wherein R 3 is C 1-8 alkyl group, C 1-8 alkenyl group, C 1-8 alkynyl group, or aromatic group.

4. The electrolyte as claimed in claim 3 , wherein in the combination of (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof, (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof have a weight ratio of 0.01:1 to 1.5.1.

5. The electrolyte as claimed in claim 3 , wherein in the combination of (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof, (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof have a weight ratio of 0.02:1 to 0.45:1.

6. The electrolyte as claimed in claim 3 , further comprising polyethylene glycol, polyvinyl alcohol, polyacryl alcohol, polyethylene oxide, propylene oxide ether, polymerized fatty acid, silicon dioxide, polyglyceride, dichromium ammonium acid, citric acid, or a combination thereof.

7. The electrolyte as claimed in claim 6 , wherein the weight of (1) the compound and the ammonium salt thereof or the combination of (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof, and the weight of polyethylene glycol, polyvinyl alcohol, polyacryl alcohol, polyethylene oxide, propylene oxide ether, polymeric fatty acid, silicon dioxide, polyglyceride, ammonium dichromate, citric acid, or a combination thereof have a ratio of 1:0.01 to 1.0.5.

8. The electrolyte as claimed in claim 3 , wherein the organic solvent includes ethylene glycol, diethylene glycol, propylene glycol, 1,4-butanediol, glycerol, N,N-dimethylformamide, gamma-butyrolactone, propylene carbonate, ethylene carbonate, diethyl carbonate, diethylene glycol methyl ether, diethylene glycol monobutyl ether, gamma-valerolactone, or a combination thereof.

9. The electrolyte of claim 8 , wherein the weight of (1) the compound and the ammonium salt thereof or the combination of (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof and the weight of the organic solvent have a ratio of 16 to 1:10.

10. A capacitor, comprising:
a capacitor element, comprising:
an anode aluminum foil;
a cathode aluminum foil; and
a separator, interposed therebetween the anode aluminum foil and the cathode aluminum foil; and

an electrolyte, wherein the capacitor element is impregnated with the electrolyte,
wherein the electrolyte comprises: an organic solvent; and (1) a compound and an ammonium salt thereof or combination of (1) die compound and the ammonium salt thereof and (2) a diacid and an ammonium salt thereof, wherein the compound has a chemical structure of:

wherein R 1 is C 1-8 alkyl group, C 1-8 alkenyl group, C 1-8 alkynyl group, or aromatic group; and R 2 is —(C n H 2n )—OH, and n is an integer from 2 to 8; wherein the diacid has a chemical structure of:

wherein R 3 is C 1-8 alkyl group, C 1-8 alkenyl group, C 1-8 alkynyl group, or aromatic group.

11. The capacitor as claimed in claim 10 , wherein in the combination of (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof have a weight ratio of 0.01:1 to 1.5.1.

12. The capacitor as claimed in claim 10 , wherein in the combination of (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof, (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof have a weight ratio of 0.02:1 to 0.45:1.

13. The capacitor as claimed in claim 10 , further comprising polyethylene glycol, polyvinyl alcohol, polyacryl alcohol, polyethylene oxide, propylene oxide ether, polymerized fatty acid, silicon dioxide, polyglyceride, dichromium ammonium acid, citric acid, or a combination thereof.

14. The capacitor as claimed in claim 13 , wherein the weight of (1) the compound and the ammonium salt thereof or the combination of (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof, and the weight of polyethylene glycol, polyvinyl alcohol, polyacryl alcohol, polyethylene oxide, propylene oxide ether, polymeric fatty acid, silicon dioxide, polyglyceride, ammonium dichromate, citric acid, or a combination thereof have a ratio of 1:0.01 to 1.0.5.

15. The capacitor as claimed in claim 10 , wherein the organic solvent includes ethylene glycol, diethylene glycol, propylene glycol, 1,4-butanediol, glycerol, N,N-dimethylformamide, gamma-butyrolactone, propylene carbonate, ethylene carbonate, diethyl carbonate, Diethylene glycol methyl ether, diethylene glycol monobutyl ether, gamma-valerolactone, or a combination thereof.

16. The capacitor as claimed in claim 15 , wherein the weight of (1) the compound and the ammonium salt thereof, or the combination of (1) the compound and the ammonium salt thereof and (2) the diacid and the ammonium salt thereof and the weight of the organic solvent have a ratio of 1:6 to 1:10.

Assignees

• Ind Tech Res Inst

Inventors

• Pan Che-Wei
• WANG Chiu-Tung
• Tsai Li-Duan

Classifications

• C07C69/34 Primary

  Esters of acyclic saturated polycarboxylic acids having an esterified carboxyl group bound to an acyclic carbon atom · CPC title

• H01G9/02

  Diaphragms; Separators · CPC title

• H01G9/035

  Liquid electrolytes, e.g. impregnating materials (H01G11/54 takes precedence) · CPC title

• H01G9/045

  based on aluminium · CPC title

• C07C69/50 Primary

  Sebacic acid esters · CPC title