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Three-dimensional porous aluminum mesh, electrode using same, nonaqueous-electrolyte battery using said electrode, and capacitor and lithium-ion capacitor using nonaqueous liquid electrolyte

A technology of aluminum porous body and three-dimensional network, which is applied in the field of three-dimensional network aluminum porous body, can solve the problems of difficult formation, slow formation of aluminum layer, and difficulty in manufacturing porous body, so as to improve retention and battery life, The effect of reducing industrial production costs and improving internal utilization

Active Publication Date: 2013-10-09
SUMITOMO ELECTRIC IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] According to this method, it is recorded that an aluminum porous body with a thickness of 2 μm to 20 μm is obtained; however, since this method is based on a gas phase method, it is not easy to manufacture a large-area porous body, and depending on the thickness or porosity of the substrate, it is not easy Forms a uniform layer up to the inside of the porous body
In addition, this method has the following problems: the formation speed of the aluminum layer is slow; the manufacturing cost is high due to expensive manufacturing equipment
[0013] Incidentally, in order to use the aluminum porous body thus obtained as an electrode, it is necessary to pass figure 1 The procedure shown is to attach a lead wire to an aluminum porous body to form a current collector, to fill the active material into the aluminum porous body as a current collector, and then to press and cut the obtained aluminum porous body, however, it is not known Any practical technology for industrially producing electrodes of non-aqueous electrolyte batteries, capacitors including non-aqueous electrolyte, lithium ion capacitors including non-aqueous electrolyte, etc. from aluminum porous bodies

Method used

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  • Three-dimensional porous aluminum mesh, electrode using same, nonaqueous-electrolyte battery using said electrode, and capacitor and lithium-ion capacitor using nonaqueous liquid electrolyte
  • Three-dimensional porous aluminum mesh, electrode using same, nonaqueous-electrolyte battery using said electrode, and capacitor and lithium-ion capacitor using nonaqueous liquid electrolyte
  • Three-dimensional porous aluminum mesh, electrode using same, nonaqueous-electrolyte battery using said electrode, and capacitor and lithium-ion capacitor using nonaqueous liquid electrolyte

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Embodiment approach 1

[0060] As described above, the three-dimensional network aluminum porous body of the present invention is characterized in that the pore diameter is not uniform in the thickness direction, and as a three-dimensional network aluminum porous body having such a constitution, it is conceivable that, for example, the following implementation Methods [1] to [3]:

[0061] [1] such as figure 2 In the illustrated embodiment, the pore diameter of the inner part (central part) of the sheet-shaped aluminum porous body is reduced, and the pore diameter of the outer surface parts (surface and back surface) thereof is increased.

[0062] [2] such as image 3 In the illustrated embodiment, the pore diameters of the outer surface portions (surface and back) of the sheet-shaped aluminum porous body are reduced, and the pore diameters of the inner portion (central portion) thereof are increased.

[0063] [3] If Figure 4 In the illustrated embodiment, the pore diameter of half of the sheet-s...

Embodiment approach 1

[0066] When an aluminum porous body is used as a base material for a nonaqueous electrolyte battery (lithium battery, etc.) and a capacitor using a nonaqueous electrolyte solution and an electrode of a lithium ion capacitor each, in the portion where the pore diameter of the porous body is small, the active material The distance to the skeleton is shorter. Therefore, in the figure 2 When the three-dimensional network-shaped aluminum porous body of the embodiment [1] shown above is used as a base material of an electrode, the current collection performance and the utilization rate of the active material at the center portion in the thickness direction are improved, and an electrode with excellent output characteristics can be provided. .

[0067] Therefore, in the three-dimensional network aluminum porous body of the present invention, the ratio of the average value of the hollow pore diameters in the regions 1 and 3 to the hollow pore diameter in the region 2 is preferably 1...

Embodiment approach 2

[0075] When an aluminum porous body is used as a base material for electrodes of nonaqueous electrolyte batteries (lithium batteries, etc.) and capacitors and lithium ion capacitors each using a nonaqueous electrolyte solution, as described above, in the portion where the pore diameter is small, The distance between the active material and the skeleton is short. In addition, in general, a portion with a smaller pore diameter generally has an effect of suppressing falling-off of the filled active material than a portion with a larger pore diameter. In addition, when the aluminum porous body is subjected to figure 1 In the step F (compression step) of the electrode preparation steps shown, in the portion where the pore diameter is small, since the bonding between the active material and the skeleton is strong, the retention of the active material is improved.

[0076] Therefore, in the image 3 When the three-dimensional network aluminum porous body according to the embodiment...

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Abstract

The present invention provides: a three-dimensional porous aluminum mesh having a cell diameter that is not uniform in a thickness direction; a collector and electrode using said porous aluminum mesh; and manufacturing methods therefor. This sheet-shaped three-dimensional porous aluminum mesh for use in a collector has a cell diameter that is not uniform in the thickness direction. In particular, if the cross-section of said three-dimensional porous aluminum mesh in the thickness direction is divided into a first region, a second region, and a third region, in that order, the mean of the cell diameters in the first and third regions is preferably different from the cell diameter in the second region.

Description

technical field [0001] The present invention relates to a three-dimensional network aluminum porous body, which is used as a nonaqueous electrolyte battery (lithium battery, etc.), a capacitor using a nonaqueous electrolyte (hereinafter also referred to as a "capacitor"), and a lithium ion capacitor using a nonaqueous electrolyte (hereinafter also referred to as "lithium ion capacitor") and the like. Background technique [0002] Metal porous bodies having a three-dimensional network structure are used in the fields of various products such as various filters, catalyst supports, and electrodes for batteries. For example, Celmet (registered trademark, manufactured by Sumitomo Electric Industries, Ltd.) made of a three-dimensional network-like nickel porous body (hereinafter referred to as "nickel porous body") is used as an electrode material for batteries such as nickel-metal hydride batteries or nickel-cadmium batteries . CELMET is a metal porous body with interconnected ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/80H01G9/016H01M4/66C22C1/08C25D7/00H01G11/06H01G11/28H01G11/70
CPCY02E60/12H01G11/28C25D3/665H01G11/06H01M4/661C22C1/08H01M10/05H01M4/80H01G11/70C22C21/00Y02E60/13Y02E60/10Y10T428/12479H01G11/22H01M4/13H01M4/66
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