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

A technology of aluminum porous body and three-dimensional mesh, which is applied in the field of three-dimensional mesh aluminum porous body, can solve the problems of electrode loss of conductivity, expensive manufacturing equipment, and high manufacturing cost, and achieve the effect of reducing industrial manufacturing costs

Active Publication Date: 2013-12-25
SUMITOMO ELECTRIC IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It is said that an aluminum porous body with a thickness of 2 μm to 20 μm is obtained according to this method; however, since this method is based on a gas phase method, it is difficult to manufacture a porous body with a large area, and depending on the thickness or porosity of the substrate, it is difficult to form up to The interior of the porous body remains a uniform layer
In addition, this method has problems in that the formation speed of the aluminum layer is slow; the manufacturing cost is high due to expensive manufacturing equipment
Once aluminum is oxidized, it cannot be easily reduced. Unlike the case of nickel, when aluminum is used as an electrode material in, for example, a battery, etc., the electrode loses conductivity due to oxidation, so aluminum cannot be used as electrode material

Method used

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  • Three-dimensional network aluminum porous body, current collector and electrode each using the aluminum porous body, and nonaqueous electrolyte battery, capacitor and lithium-ion capacitor with nonaqueous electrolytic solution, each using the electrode
  • Three-dimensional network aluminum porous body, current collector and electrode each using the aluminum porous body, and nonaqueous electrolyte battery, capacitor and lithium-ion capacitor with nonaqueous electrolytic solution, each using the electrode
  • Three-dimensional network aluminum porous body, current collector and electrode each using the aluminum porous body, and nonaqueous electrolyte battery, capacitor and lithium-ion capacitor with nonaqueous electrolytic solution, each using the electrode

Examples

Experimental program
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Effect test

Embodiment approach 1

[0065] In the case of continuous fabrication of electrodes, such as figure 1 As shown, electrodes are generally manufactured by a method in which a long sheet-like substrate is unwound from a roll, undergoes a thickness adjustment step, a wire bonding step, an active material filling step, a drying step, a compression step, and a cutting step, and finally Wind it up on a roll. In such an electrode manufacturing method, if it is possible to follow the length direction of the substrate, that is, with figure 1 If the current collector lead is welded in a direction parallel to the conveying direction of the base material in the C step (lead welding step), the continuous productivity of the aluminum porous body will be more excellent. For this reason, it is preferable that the resistance in the width direction perpendicular to the length direction of the substrate is smaller than the resistance in the length direction.

[0066] in such as figure 2 In the aluminum porous body sh...

Embodiment approach 2

[0076] In general, in order to improve output characteristics, electrodes of cylindrical batteries have a structure in which a base material is wound. In the case of producing such an electrode, current collecting leads are provided at ends in the width direction of the substrate to fix a certain length of the substrate (electrode), followed by winding. Therefore, when a long sheet-shaped aluminum porous body is used as an electrode base material, it is desirable that the resistance in the length direction is smaller than the resistance in the width direction.

[0077] in such as Figure 4 In the aluminum porous body shown in which the cell diameter in the Y direction (length direction) is larger than the cell diameter in the X direction (width direction), such as Figure 5 As shown, the resistance in the Y direction (length direction) is smaller than the resistance in the X direction (width direction). Therefore, by using the aluminum porous body as a base material in elect...

Embodiment 1

[0213] (formation of conductive layer)

[0214] As a polyurethane resin molded body, a polyurethane foam having a porosity of 95%, about 50 cells (pores) per inch, a pore diameter of about 550 μm, and a thickness of 1 mm was prepared and cut into 100 mm×30 mm squares. On the surface of the polyurethane foam, the weight per unit area is 10g / m2 formed by sputtering method 2 aluminum film as the conductive layer.

[0215] (Molten Salt Plating)

[0216] Urethane foam with a conductive layer formed on its surface is loaded as a workpiece in a jig with a power supply function, and the jig is placed in a glove box that has been adjusted to an argon atmosphere and low humidity (dew point: -30°C or less) , and immerse the jig in a molten salt aluminum plating bath at a temperature of 40°C. At this time, two rolls were placed in the form of an inverted letter V with respect to the workpiece, molten salt plating was performed while increasing the width of the workpiece, and a tension ...

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Abstract

It is an object of the present invention to provide a three-dimensional network aluminum porous body which can be used for a process continuously producing an electrode and enables to produce a current collector having small electric resistance in the current collecting direction, and an electrode using the aluminum porous body, and a production method thereof. In a sheet-shaped three-dimensional network aluminum porous body for a current collector, when one of two directions orthogonal to each other is taken as an X-direction and the other is taken as a Y-direction, a cell diameter in the X-direction of the three-dimensional network aluminum porous body differs from a cell diameter in the Y-direction thereof.

Description

technical field [0001] The present invention relates to a three-dimensional network aluminum porous body used as an electrode of a nonaqueous electrolyte battery (lithium battery, etc.), a capacitor and a lithium ion capacitor, etc., each containing a nonaqueous electrolyte solution. Background technique [0002] Metallic porous bodies with a three-dimensional network structure are used in a wide range of applications such as various filters, catalyst supports, and electrodes for batteries. For example, Celmet (registered trademark, manufactured by Sumitomo Electric Industries, Ltd.) composed of a three-dimensional network-shaped nickel porous body (hereinafter referred to as "nickel porous body") is used as an electrode material for batteries such as nickel-metal hydride batteries and nickel-cadmium batteries. Celmet is a metal porous body with interconnected pores, which is characterized by a higher porosity (90% or more) than other porous bodies (such as metal non-woven f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/80C25B11/03H01G11/74H01M2/26H01M4/66H01G11/66H01G11/68H01G11/70
CPCH01G11/66H01G11/68H01G11/70H01G11/74H01M4/13H01M4/661H01M4/74H01M10/052Y02E60/10Y02E60/13Y10T29/49115Y10T428/12479H01G11/06H01M4/139
Inventor 细江晃久奥野一树太田肇木村弘太郎后藤健吾境田英彰西村淳一
Owner SUMITOMO ELECTRIC IND LTD
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