Three-dimensional net-like aluminum porous body, electrode using the aluminum porous body, nonaqueous electrolyte battery using the electrode, and nonaqueous electrolyte capacitor using the electrode

Patent metadata

Field	Value
Publication number	US-9711801-B2
Application number	US-201514804551-A
Country	US
Kind code	B2
Filing date	Jul 21, 2015
Priority date	May 31, 2010
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

Provided are a three-dimensional net-like aluminum porous body in which the diameter of cells in the porous body is uneven in the thickness direction of the porous body; a current collector and an electrode each using the aluminum porous body; and methods for producing these members. The porous body is a three-dimensional net-like aluminum porous body in a sheet form, for a current collector, in which the diameter of cells in the porous body is uneven in the thickness direction of the porous body. When a cross section in the thickness direction of the three-dimensional net-like aluminum porous body is divided into three regions of a region 1 , a region 2 and a region 3 in this order, the average cell diameter of the regions 1 and 3 is preferably different from the cell diameter of the region 2.

First claim

The invention claimed is:

1. A planar three-dimensional network aluminum porous body, for a current collector, comprising:
a first cell-diameter region in a thickness direction of the porous body, the first cell-diameter region having a first cell diameter of the porous body in the thickness direction, the first cell diameter being based on a reciprocal number of skeleton ribs in the first cell-diameter region, and the first cell diameter being defined as an average given by:
(a unit length)/(a first number of cells), and
a second cell-diameter region in the thickness direction of the porous body, the second cell-diameter region having in the thickness direction a second cell diameter of the porous body that is larger than the first cell diameter, the second cell diameter being based on a reciprocal number of skeleton ribs in the second cell-diameter region, and the second cell diameter being defined as an average given by:
(the unit length)/(a second number of cells),
wherein a plurality of the skeleton ribs in the first cell-diameter region and the second cell-diameter region are hollow and have a uniform thickness aluminum layer, and
a cross section in the thickness direction of the porous body has three regions laminated to each other including a region 1 of the first cell diameter, a region 2 of the second cell diameter, and a region 3 of the first cell diameter, in order, and a ratio of the average cell diameter of the region 1 and the region 3 to the cell diameter of the region 2 is 0.9 or less.

2. The planar three-dimensional network aluminum porous body according to claim 1 , wherein an oxygen content in a surface of the porous body is 3.1% by mass or less.

3. The planar three-dimensional network aluminum porous body according to claim 1 , wherein when the porous body is divided in the thickness direction thereof into a large-cell-diameter region having a large cell diameter and a small-cell-diameter region having a smaller cell diameter than this large cell diameter, the cell diameter of the large-cell-diameter region is 300 μm or more and 600 μm or less.

4. The planar three-dimensional network aluminum porous body according to claim 1 , wherein when the porous body is divided in the thickness direction thereof into a large-cell-diameter region having a large cell diameter and a small-cell-diameter region having a smaller cell diameter than this large cell diameter, the cell diameter of the small-cell-diameter region is 50 μm or more and 300 μm or less.

5. An electrode wherein the planar three-dimensional network aluminum porous body as recited in claim 1 is used.

6. A nonaqueous electrolyte battery wherein the electrode as recited in claim 5 is used.

7. A capacitor using a nonaqueous electrolyte wherein the electrode as recited in claim 5 is used.

Assignees

• Sumitomo Electric Industries
• Sumitomo Electric Toyama Co

Inventors

• Ota Nobuhiro
• Hosoe Akihisa
• Majima Masatoshi
• Nitta Koji
• Ota Hajime
• Okuno Kazuki
• Kimura Koutaro
• Goto Kengo
• Nishimura Junichi

Classifications

• H01G9/145

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

• H01G11/66

  Current collectors · CPC title

• H01M4/747

  Woven material · CPC title

• H01M4/808

  Foamed, spongy materials · CPC title

• H01M4/131 Primary

  Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title