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A method for preparing porous electrode with high specific surface area

A high specific surface area, porous electrode technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of large environmental pollution of chemical solutions, low preparation efficiency, low repetition rate, etc., to achieve shortened preparation cycle, high preparation efficiency, easy-to-handle effects

Active Publication Date: 2017-02-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the existing nanostructure electrode prepared by solution impregnation method needs to be impregnated multiple times, the preparation efficiency is low, the repetition rate is low, and the chemical solution used pollutes the environment greatly, and a method for preparing a high specific surface area electrode is provided. porous electrode method

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  • A method for preparing porous electrode with high specific surface area
  • A method for preparing porous electrode with high specific surface area
  • A method for preparing porous electrode with high specific surface area

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specific Embodiment approach 1

[0023] Specific Embodiment 1: This embodiment is a method for preparing a porous electrode with a high specific surface area, which is completed according to the following steps:

[0024] 1. Hang the porous electrolyte / dielectric and the catalyst target on the sample holder of the pulse plasma multi-component co-infiltration furnace, then evacuate the pulse plasma multi-component co-infiltration furnace to a vacuum degree of 10Pa ~ 30Pa, and then put the pulse plasma The multi-component co-infiltration furnace is kept at a vacuum of 10Pa to 30Pa and a DC voltage of 500V to 700V for 10min to 30min;

[0025] 2. ①. Inject H into the pulse plasma multi-component co-infiltration furnace 2 , and then evacuate the pulse plasma multi-component co-infiltration furnace at the same time, so that the pressure in the pulse plasma multi-component co-infiltration furnace is 50Pa ~ 100Pa, and then when the pressure is 50Pa ~ 100Pa and H 2 Keep the pulse plasma multi-component co-infiltration...

specific Embodiment approach 2

[0037] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the porous electrolyte / dielectric described in step 1 is porous yttrium-stabilized zirconia, porous YSZ / NiO composite, porous samarium-doped ceria or porous al 2 o 3 / SiO 2 Complex. Others are the same as the first embodiment.

[0038] The porous YSZ / NiO composite described in this embodiment is formed by mixing porous YSZ and porous NiO in any proportion; the porous Al 2 o 3 / SiO 2 Composite is porous Al 2 o 3 and porous SiO 2 Mixed in any proportion.

specific Embodiment approach 3

[0039] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the thickness of the porous electrolyte / dielectric described in step 1 is 0.5 mm to 1 mm. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

A method for preparing a porous electrode with a high specific surface area relates to a preparation method of a porous electrode. The purpose of the invention is to solve the problem that a conventional nanostructured electrode, which is prepared by using a solution dipping method, needs to be dipped many times, and is low in preparation efficiency and repetitive rate, and the adopted chemical solution causes serious pollution to the environment. The method comprises the steps as follows: suspending a porous electrolyte / dielectric and a catalyst target on a sample holder of a pulse plasma multicomponent thermochemical furnace, vacuumizing, and maintaining pressure; and inflating hydrogen, then inflating hydrogen and argon, and keeping warm to obtain aporous electrode. In this way, the method for preparing the porous electrode with the high specific surface area is achieved. Compared with a conventional solution dipping method, the method of the invention can be used for forming the porous electrode with the high specific surface area within hours, is shortened more than ten times in preparation period, and therefore is reduced in cost. The invention provides the method that can prepare the porous electrode with the high specific surface area.

Description

technical field [0001] The invention relates to a preparation method of a porous electrode. Background technique [0002] Porous media, especially inorganic non-metallic porous ceramic electrolytes / dielectrics, have important applications in many fields. Doped perovskite and stabilized fluorite structure oxides play irreplaceable functions in devices such as gas phase separation membranes, oxygen permeable membranes, membrane reactors, solid fuel cells, and solid electrolyzers. There are two main sources that limit the performance of these devices: one is the surface process (such as surface chemical reaction, interface charge transfer, etc.), and the other is the bulk phase process (such as the conduction of oxygen ions and electrons in the film). Existing thin film fabrication techniques can already minimize the resistance to bulk processes by reducing film thickness. How to reduce the resistance of the surface process is an important issue facing the academic and indust...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88
CPCH01M4/8605H01M4/88Y02E60/50
Inventor 张雁祥闫牧夫王祎雪张华良李怀旭
Owner HARBIN INST OF TECH
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