Capacitor with charge time reducing additives and work function modifiers

Patent metadata

Field	Value
Publication number	US-10522296-B2
Application number	US-201916237862-A
Country	US
Kind code	B2
Filing date	Jan 2, 2019
Priority date	May 21, 2014
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

A capacitor, and method for making the capacitor, is provided with improved charging characteristics. The capacitor has an anode, a cathode comprising a conductive polymer layer and a work function modifier layer adjacent the conductive polymer layer and a dielectric layer between the anode and the cathode.

First claim

The invention claimed is:

1. A capacitor comprising:
an anode;
a dielectric on said anode; and
a cathode on said anode comprising a conductive polymer layer; and a work function modifier layer in a location to be adjacent said conductive polymer layer wherein said work function modifier layer comprises a work force modifier capable of reducing a work function of said conductive polymer layer wherein said work function modifier is an ionic liquid wherein said ionic liquid is selected from cationic ionic liquids or polycationic ionic liquids.

2. The capacitor of claim 1 wherein said work function modifier is incorporated in a nanogel.

3. The capacitor of claim 2 wherein said nanogel is chemically crosslinked.

4. The capacitor of claim 2 wherein said nanogel is crosslinked by irradiation.

5. The capacitor of claim 2 wherein said nanogel comprises linear dendritic hybrid polymers.

6. The capacitor of claim 5 wherein said linear dendritic hybrid polymers have average hydroxyl groups of no more than 128.

7. The capacitor of claim 2 where said nanogel further comprises a cationic polyelectrolyte.

8. The capacitor of claim 2 wherein said nanogel is prepared from an ionic liquid and a polyelectrolyte.

9. The capacitor of claim 2 wherein said nanogel is prepared from a polysaccharide and 1-ethyl-3-methylimidazolium tetrafluoroborate.

Assignees

• Kemet Electronics Corp

Inventors

• Chacko Antony P
• Shi Yaru
• Ramsbottom Robert
• Kinard John T
• Ols John Joseph

Classifications

• H01G9/0425

  specially adapted for cathode · CPC title

• H01G9/0036 Primary

  Formation of the solid electrolyte layer · CPC title

• H01G9/025

  Solid electrolytes (H01G11/54 takes precedence) · CPC title

• H01G9/15

  Solid electrolytic capacitors (H01G11/00 takes precedence) · CPC title

• H01G9/0032

  formation of the dielectric layer · CPC title