US 2013/0155578 A1 · CAPACITOR AND MANUFACTURING METHOD THEREOF

Abstract

A capacitor and a manufacturing method thereof are provided. Two electrodes are disposed opposite to each other. Two electrode protection layers are respectively disposed on inner sides of the electrodes and include carbon particles each covered and bonded with a polymer shell. Active carbon layers are disposed on opposite inner sides of the electrode protection layers. The separator is disposed between the active carbon layers. The electrolyte fills between the electrode protection layers. The polymer shells of each electrode protection layer are bonded to the surface of the corresponding electrode by first and second functional groups. The first functional groups include thiol groups. The second functional groups include epoxy groups or carboxylic groups. The electrode protection layers serve as adhesion layers between the active carbon layers and the electrodes, and protect the electrodes from being corroded by the acid electrolyte solution.

Claims20

Dependent claims

A capacitor comprising:

two electrodes disposed opposite to each other;
two electrode protection layers respectively disposed on opposite inner sides of the electrodes, the electrode protection layers comprising carbon particles each covered and bonded with a polymer shell;
two active carbon layers respectively disposed on opposite inner sides of the electrode protection layers;
a separator disposed between the active carbon layers;
and
an electrolyte filling space between the two electrode protection layers,
wherein the polymer shells of the electrode protection layers are bonded to surfaces of the electrodes through first and second functional groups, the first functional groups comprise thiol groups, and the second functional groups comprise epoxy groups or carboxylic groups.

4 more elements

A manufacturing method of a capacitor, comprising:

providing two electrodes;
forming an electrode protection layer on a surface of each of the electrodes, the electrode protection layers comprising carbon particles each covered and bonded with a polymer shell, wherein a method of forming the electrode protection layers comprises:
respectively performing a surface treatment step on the surface of each of the electrodes, so as to generate first functional groups on the surface of each of the electrodes, the first functional groups comprising thiol groups;
grafting polymer chains onto surfaces of the carbon particles to form modified carbon particles, the polymer chains having second functional groups, the second functional groups comprising epoxy groups or carboxylic groups;
covering the treated surfaces of the electrodes with the modified carbon particles;
and
adding a cross-linking agent to the surfaces of the carbon particles and carrying out a cross-linking reaction to form the electrode protection layer on each of the electrodes;
forming an active carbon layer on a surface of each of the electrode protection layers, wherein the surface of each of the electrode protection layers is not opposite to the electrode;
placing the two electrodes opposite to each other, such that the active carbon layers are located on respective inner sides of the two electrodes, and placing a separator between the active carbon layers;
and
injecting an electrolyte between the electrode protection layers.

8 more elements

A manufacturing method of a capacitor, comprising:

providing two electrodes;
forming an electrode protection layer on a surface of each of the electrodes, the electrode protection layers comprising carbon particles each covered and bonded with a polymer shell, wherein a method of forming the electrode protection layers comprises:
grafting polymer chains onto surfaces of the carbon particles to form modified carbon particles, the polymer chains having first and second functional groups, the first functional groups comprising epoxy groups or carboxylic groups, the second functional groups comprising thiol groups;
covering the surface of each of the electrodes with the modified carbon particles;
and
adding a cross-linking agent to the surfaces of the carbon particles and carrying out a cross-linking reaction to form the electrode protection layer on each of the electrodes;
forming an active carbon layer on a surface of each of the electrode protection layers, wherein the first surface of each of the electrode protection layers is not opposite to the electrode;
placing the two electrodes opposite to each other, such that the active carbon layers are located on respective inner sides of the two electrodes, and placing a separator between the active carbon layers;
and
injecting an electrolyte between the electrode protection layers.

7 more elements

Dependencies are inferred from the claim text.

Capacitor and manufacturing method thereof

Life of this patent

Capacitor and manufacturing method thereof

Life of this patent

Abstract

Claims20