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Porous composite electrode and preparation method therefor

A composite electrode and porous metal technology, which is applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, battery electrodes, etc., can solve the problems of high cost and difficulty in large-scale production, and achieve high utilization rate, charge and ion The effect of short transmission distance and stable performance

Active Publication Date: 2016-08-17
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above method has made some progress, it is not easy to produce on a large scale, and the cost is high

Method used

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  • Porous composite electrode and preparation method therefor
  • Porous composite electrode and preparation method therefor
  • Porous composite electrode and preparation method therefor

Examples

Experimental program
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Effect test

Embodiment 1

[0068] Example 1 Preparation of porous metal body

[0069] In this embodiment, the method for preparing a porous metal body includes the following steps:

[0070] Copper powder is used as template particles, and porous metal is prepared by electroplating nickel method:

[0071] (1) Place commercial electrolytic copper powder with a particle size of about 50nm to 100 μm on a graphite plate of 3 cm×10 cm, and prepare a layer of electrolytic copper powder with a thickness of 1 μm to 100 μm using an adjustable membrane device. The graphite plate loaded with the electrolytic copper powder layer was placed in a vacuum tube furnace, vacuumed, heat-treated and sintered at 700° C. to 900° C. for 2 hours, and cooled naturally.

[0072] (2) Put the copper sheet template prepared in step (1) as the cathode into the nickel plating solution and fully soak it, and the nickel sheet as the anode, at a current density of 5mA cm -2 Electroplating is carried out for 1.5 to 2 hours under certain...

Embodiment 2

[0080] Example 2 Preparation of metallic nickel porous body MnO x Compound electrode

[0081] The preparation of the metal nickel porous body MnO in this embodiment x The method for compound electrode, comprises the steps:

[0082] (1) In this experiment, a 20 μm electrolytic copper powder layer was prepared using an adjustable membrane device. The heat treatment and sintering process is carried out at 900°C to obtain a connected electrolytic copper powder template.

[0083] (2) Put the copper sheet template prepared in step (1) as the cathode into the nickel plating solution and fully soak it, and the metal nickel sheet as the anode, at a current density of 2mA cm -2 Electroplating is carried out for 1.5 to 2 hours under certain conditions.

[0084] (3) The material obtained in step (2) is fully cleaned, with 140g L -1 Sodium persulfate, 250g L -1 Ammonium sulfate, 140g L -1 The chemical copper-removing solution prepared by sodium hydroxide is subjected to copper-remov...

Embodiment 3

[0092] Example 3 Preparation of metallic nickel porous body NiCo 2 o 4 Compound electrode

[0093] The preparation of metal nickel porous body NiCo in this embodiment 2 o 4 The method for compound electrode, comprises the steps:

[0094] (1) In this experiment, a 20 μm electrolytic copper powder layer was prepared using an adjustable membrane device. The heat treatment and sintering process is carried out at 900°C to obtain a connected electrolytic copper powder template.

[0095] (2) Put the copper sheet prepared in step (1) as the cathode into the SN nickel plating solution and fully soak it, and the metal nickel sheet as the anode, at a current density of 2mA cm -2 Electroplating is carried out for 1.5 to 2 hours under certain conditions.

[0096] (3) The material obtained in step (2) is fully cleaned, with 140g L -1 Sodium persulfate, 250g L -1 Ammonium sulfate, 140g L -1 The chemical copper-removing solution prepared by sodium hydroxide is subjected to copper-rem...

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Abstract

The invention provides a porous composite electrode and a preparation method therefor. The porous composite electrode comprises a metal porous body, and noble metal, noble metal alloy, metal hydroxide or metal oxide loaded on the surface of the metal porous body, wherein the metal porous body accounts for 0.05-20% of the whole electrode based on volume percentage; the metal porous body adopts a three-dimensional network structure, and is a continuous porous metal framework; the metal framework has ultra-thin metal walls; and the metal framework is 5-500nm in wall thickness, 80-99.95% in framework porosity, and 50nm-100[mu]m in pore diameter. The porous composite electrode provided by the invention is mainly applied to the fields of a supercapacitor, a lithium ion battery and an air (or oxygen) battery, as well as can be applied in the filtering and other electro-catalysis fields.

Description

technical field [0001] The invention relates to a porous composite electrode and a preparation method thereof, which are applied to supercapacitors, lithium ion batteries, lithium air batteries and other energy storage devices, as well as fields such as filtration and electrocatalysis. Background technique [0002] High-energy-density energy storage technology is an important direction for future clean energy utilization, and supercapacitors, lithium-ion batteries, and metal-air batteries are the most important energy storage devices. Such electrodes need to have good electronic pathways. The metal-air electrode also needs to use a high-performance air electrode (or oxygen electrode) with catalytic properties that can reduce the resistance of the electrochemical process of oxygen reduction and precipitation. As an electrochemical device, the oxygen electrode must have good electrical conductivity and be able to quickly transfer dissolved oxygen and evolved oxygen. Similar ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/86H01M4/86H01M4/88H01M12/06
CPCH01M4/8621H01M4/88H01M12/06H01G11/24H01G11/30H01G11/86Y02E60/13
Inventor 张会刚刘自强濮军王建昌绍忠
Owner NANJING UNIV
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