Three-dimensional network aluminum porous body for current collector, and current collector, electrode, nonaqueous electrolyte battery, capacitor and lithium-ion capacitor, each using aluminum porous body

Abstract

It is an object of the present invention to provide a current collector including an aluminum porous body suitable for an electrode for a nonaqueous electrolyte battery and an electrode for a capacitor electrode, and an electrode using the current collector. In the three-dimensional network aluminum porous body for a current collector of the present invention, when a sheet-shaped three-dimensional aluminum porous body is divided in the width direction into a central region and two end regions with the central region situated therebetween, the weight per unit area of aluminum in the aluminum porous body at the two end regions is larger than the weight per unit area of aluminum in the aluminum porous body at the central region.

1 - 8 . (canceled) 
     
     
         9 : A capacitor comprising: an electrode having a three-dimensional network aluminum porous body as a current collector; and a nonaqueous electrolytic solution, wherein
 when a precursor body for the three-dimensional network aluminum porous body has a central region and two end regions with the central region situated therebetween in a width direction, weights per unit area of aluminum in the aluminum porous body at the two end regions are larger than a weight per unit area of aluminum in the aluminum porous body at the central region.   
     
     
         10 : The capacitor according to  claim 9 , wherein a sheet-shaped three-dimensional network aluminum porous body being obtained by cutting in half the precursor body at a central part in the width direction has a weight per unit area of aluminum at one end part that is larger than a weight per unit area of aluminum at the other end part in the width direction. 
     
     
         11 : The capacitor according to  claim 10 , wherein the current collector has a tab lead welded to be bonded to the end part where the weight per unit area of aluminum is smaller in the three-dimensional network aluminum porous body. 
     
     
         12 : The capacitor according to  claim 11 , wherein the current collector is formed by bonding a tab lead to a compressed part, the compressed part being formed by compressing in the thickness direction the end part where the weight per unit area of aluminum is smaller. 
     
     
         13 : The capacitor according to  claim 11 , wherein the electrode is formed by filling a porous part of the current collector with an active material. 
     
     
         14 : The capacitor according to  claim 12 , wherein the electrode is formed by filling a porous part of the current collector with an active material. 
     
     
         15 : A lithium-ion capacitor comprising: an electrode having a three-dimensional network aluminum porous body as a current collector; and a nonaqueous electrolytic solution, wherein
 when a precursor body for the three-dimensional network aluminum porous body has a central region and two end regions with the central region situated therebetween in a width direction, weights per unit area of aluminum in the aluminum porous body at the two end regions are larger than a weight per unit area of aluminum in the aluminum porous body at the central region.   
     
     
         16 : The lithium-ion capacitor according to  claim 15 , wherein a sheet-shaped three-dimensional network aluminum porous body being obtained by cutting in half the precursor body at a central part in the width direction has a weight per unit area of aluminum at one end part that is larger than a weight per unit area of aluminum at the other end part in the width direction. 
     
     
         17 : The lithium-ion capacitor according to  claim 16 , wherein the current collector has a tab lead welded to be bonded to the end part where the weight per unit area of aluminum is smaller in the three-dimensional network aluminum porous body. 
     
     
         18 : The lithium-ion capacitor according to  claim 17 , wherein the current collector is formed by bonding a tab lead to a compressed part, the compressed part being formed by compressing in the thickness direction the end part where the weight per unit area of aluminum is smaller. 
     
     
         19 : The lithium-ion capacitor according to  claim 17 , wherein the electrode is formed by filling a porous part of the current collector with an active material. 
     
     
         20 : The lithium-ion capacitor according to  claim 18 , wherein the electrode is formed by filling a porous part of the current collector with an active material.