Electrode for super-capacitor, super-capacitor including electrode, and method for preparing electrode

Abstract

An electrode for a super-capacitor, a super-capacitor including the electrode, and a method of preparing the electrode in which the electrode includes a conductive substrate; metal nano structures formed on the conductive substrate; and a metal oxide coated on the metal nano structures. The electrode for the super-capacitor increases the capacitance of the super-capacitor.

What is claimed is: 
     
         1 . A method of manufacturing an electrode for a super-capacitor, the method comprising:
 coating a first metal on a surface of a porous template to form a first metal layer, the porous template having regularly arranged nanopores, and the first metal layer closing ends of each of the nanopores of the porous template;   forming conducting polymer rods on the first metal layer in the nanopores of the porous template;   etching a portion of the porous template to form spaces between the conducting polymer rods and surfaces of the nanopores;   forming metal nanotubes comprising the first metal and a second metal in the spaces;   selectively etching the conducting polymer rods, the second metal, and the porous template to form porous metal nanotubes formed of the first metal; and   coating a metal oxide on the porous metal nanotubes to form a metal oxide layer.   
     
     
         2 . The method of  claim 1 , wherein the porous template is an anodic aluminum oxide template. 
     
     
         3 . The method of  claim 1 , wherein opposite ends of each of the nanopores, the opposite ends being opposite to the ends closed by the first metal layer, are open. 
     
     
         4 . The method of  claim 1 , wherein the first metal comprises one selected from the group consisting of Au, Ag, Ni, Cu, Pt, Mn, Ru, Li, and any combinations thereof. 
     
     
         5 . The method of  claim 1 , wherein the second metal is different from the first metal, and comprises one selected from the group consisting of Au, Ag, Ni, Cu, Pt, Mn, Ru, U. and any combinations thereof. 
     
     
         6 . The method of  claim 1 , wherein the conducting polymer rods comprise at least one selected from the group consisting of polyaniline, polythiophen, polypyrrole, and any combinations thereof. 
     
     
         7 . The method of  claim 1 , wherein the metal oxide comprises at least one selected from the group consisting of RuO 2 , MnO 2 , IrO 2 , NiO x  (0<x<2), CoO x  (0<x<2), and any combinations thereof. 
     
     
         8 . The method of  claim 1 , further coating a porous polymer on the metal oxide layer. 
     
     
         9 . The method of  claim 8 , wherein the porous polymer comprises at least one selected from the group consisting of NAFION, ACIPLEX, FLEMION, DOW, and any combinations thereof. 
     
     
         10 . The method of  claim 1 , further comprising, before the etching, drying the conducting polymer rods at a temperature of about 50 to about 200° C. for about 30 minutes to about 2 hours. 
     
     
         11 . A method of manufacturing an electrode for a super-capacitor, the method comprising:
 coating a first metal on a surface of a porous template to form a first metal layer, the porous template having regularly arranged nanopores, and the first metal layer closing ends of each of the nanopores of the porous template;   forming metal nanorods on the first metal layer in the nanopores of the porous template;   etching the porous template; and   coating a metal oxide on the metal nanorods to form a metal oxide layer.   
     
     
         12 . The method of  claim 11 , wherein the porous template is an anodic aluminum oxide template. 
     
     
         13 . The method of  claim 11 , wherein opposite ends of each of the nanopores, the opposite ends being opposite to the ends closed by the first metal layer, are open. 
     
     
         14 . The method of  claim 11 , wherein the first metal comprises one selected from the group consisting of Au, Ag, Ni, Cu, Pt, Mn, Ru, Li, and any combinations thereof. 
     
     
         15 . The method of  claim 11 , wherein the metal oxide comprises at least one selected from the group consisting of RuO 2 , MnO 2 , IrO 2 , NiO x  (0<x<2), CoO x  (0<x<2), and any combinations thereof. 
     
     
         16 . The method of  claim 11 , further coating a porous polymer on the metal oxide layer. 
     
     
         17 . The method of  claim 16 , wherein the porous polymer comprises at least one selected from the group consisting of NAFION, ACIPLEX, FLEMION, DOW, and any combinations thereof.