KR-20260065167-A - Apparatus and Method for Manufacturing Electrochemical Catalytic Electrode Based on Ultrasonic Spray

KR20260065167AKR 20260065167 AKR20260065167 AKR 20260065167AKR-20260065167-A

Abstract

The present invention relates to an apparatus and method for manufacturing an electrochemical catalytic electrode based on ultrasonic spray, and more specifically, to an apparatus and method capable of manufacturing a large-area electrochemical catalytic electrode of high uniformity and high performance using ultrasonic spray coating.

Inventors

김현탁
박민주
박지훈
유영우
이진희
김상준
김경민
김민철
신재호

Assignees

한국화학연구원

Dates

Publication Date: 20260508
Application Date: 20241101

Claims (12)

In an apparatus for manufacturing an ultrasonic spray-based electrochemical catalytic electrode that forms a coating layer on an electrode substrate by spraying a coating fluid onto the electrode substrate using ultrasound, The above-mentioned electrochemical catalyst electrode manufacturing apparatus is A chamber section with an internal space formed; A heat dissipation unit installed on the wall of the chamber section and dissipating heat generated inside the chamber section to the outside; A substrate portion installed inside the chamber portion, arranging a base material for an electrode and heating the base material for the electrode; and An apparatus for manufacturing an ultrasonic spray-based electrochemical catalyst electrode, characterized by comprising: one or more ultrasonic spray nozzle parts that coat the surface of an electrode substrate by spraying a coating fluid onto the electrode substrate disposed on the above-mentioned substrate using ultrasonic vibration.
In paragraph 1, The above chamber part is characterized by having a vent part for discharging gas generated during coating, in an apparatus for manufacturing an electrochemical catalyst electrode.
In paragraph 1, An apparatus for manufacturing an ultrasonic spray-based electrochemical catalyst electrode, characterized in that the coating fluid spraying speed of the ultrasonic spray nozzle part is 50 uL/min to 4000 uL/min.
In paragraph 1, An apparatus for manufacturing an ultrasonic spray-based electrochemical catalyst electrode, characterized in that the above ultrasonic waves have a frequency of 60 kHz to 180 kHz.
In paragraph 1, An apparatus for manufacturing an ultrasonic spray-based electrochemical catalyst electrode, characterized in that the temperature of the above-mentioned substrate is 30 ℃ to 300 ℃.
In paragraph 1, An apparatus for manufacturing an ultrasonic spray-based electrochemical catalyst electrode, characterized in that the coating fluid comprises one or more metal elements selected from the group consisting of silver (Ag), gold (Au), zinc (Zn), nickel (Ni), iron (Fe), cobalt (Co), manganese (Mn), copper (Cu), tin (Sn), rhodium (Rh), and palladium (Pd).
In paragraph 1, An apparatus for manufacturing an ultrasonic spray-based electrochemical catalytic electrode, characterized in that the electrode base material comprises one or more selected from the group consisting of carbon black, carbon nanotubes, graphene, carbon nanofibers, graphene oxide, reduced graphene oxide, and graphitized carbon black.
In paragraph 1, An apparatus for manufacturing an ultrasonic spray-based electrochemical catalyst electrode, characterized in that the electrode base material is a shape selected from the group consisting of mesh, foam, felt, foil, plate, paper, and fiber.
A method for manufacturing an ultrasonic spray-based electrochemical catalytic electrode, wherein a coating layer is formed on an electrode substrate by spraying a coating fluid onto the electrode substrate using ultrasound. The above method for manufacturing the electrochemical catalyst electrode is (a) a step of preparing a coating fluid; and (b) a step of coating the prepared coating fluid of step (a) using an ultrasonic spray method on a heated electrode substrate located inside a chamber with an internal space; comprising, A method for manufacturing an ultrasonic spray-based electrochemical catalyst electrode, characterized in that the heat generated in step (b) above is released to the outside by a heat dissipation means.
In Paragraph 9, A method for manufacturing an ultrasonic spray-based electrochemical catalyst electrode, characterized in that the above-mentioned heat dissipation means releases heat to the outside by means of a heat dissipation unit installed on the wall of the chamber.
In Paragraph 10, A method for manufacturing an ultrasonic spray-based electrochemical catalyst electrode, characterized in that the chamber portion further comprises a vent means for discharging gas generated during coating.
An ultrasonic spray-based electrochemical catalytic electrode characterized by being manufactured by the manufacturing method of either claim 9 or claim 11.

Description

Apparatus and Method for Manufacturing Electrochemical Catalytic Electrode Based on Ultrasonic Spray The present invention relates to an apparatus and method for manufacturing an ultrasonic spray-based electrochemical catalytic electrode, and more specifically, to an apparatus and method for manufacturing an ultrasonic spray-based electrochemical catalytic electrode capable of manufacturing a large-area electrochemical catalytic electrode of high uniformity and high performance using ultrasonic spray coating. As industry develops, the global use of petroleum products is increasing, leading to a trend of rising carbon dioxide emissions. Consequently, global warming is accelerating, destroying ecosystems. In response, carbon dioxide reduction technology is in demand and is being actively researched. One of the representative technologies used for carbon dioxide reduction is the electrochemical reduction of carbon dioxide using metal catalysts. Representative metal catalysts used for carbon dioxide reduction include copper, gold, silver, zinc, titanium, nickel, iron, platinum, cadmium, tin, indium, mercury, lead, and gallium. If these metal catalysts are not uniformly coated, the energy conversion efficiency of carbon dioxide is low due to the reduced reactive surface area and active sites, which has the disadvantage of requiring more electrical energy to obtain the necessary products. To address these issues, existing research has proposed alternatives to increase reaction area and active sites, such as coating metal nanoparticles, utilizing metal oxide nanostructures formed by thermal oxidation as catalysts through reduction, and forming metal nanostructures via electroplating. However, methods involving metal nanoparticle coating, thermal oxidation, and electroplating have limitations, including low reproducibility and difficulties in controlling pattern shapes and applying them over large areas. Furthermore, as issues regarding the productivity of electrochemical reaction processes are being raised, large-area catalyst electrodes (> 100 cm² ) using an accessible slot-die-based roll-to-roll process are being actively developed (Patent Document 0001). However, the roll-to-roll process had limitations, such as poor uniformity of thin film coating, limited coating thickness, the necessity of using inert binders, and the inability to utilize porous current collectors, which resulted in a decrease in area-to-area ratio performance as the area increased. To overcome this, recent studies have reported improving the uniformity and area ratio performance of large-area catalytic electrodes by introducing a spray process (Patent Documents 0002 and 0003). However, conventional spray-based coating solutions have difficulty securing uniform thin film thickness and composition because precipitation occurs during coating when the viscosity is high or the particles are not stably dispersed in the solution. Furthermore, spray-based thin film coating is not only unsuitable for large-area coating when metal or inorganic nanoparticles precipitate, but also has limitations such as significantly varying reproducibility depending on the user's skill level and difficulty in utilizing carbon conductive materials due to the limited dispersion of the precursor solution. FIG. 1 is a schematic diagram of a manufacturing apparatus for an ultrasonic spray-based electrochemical catalyst electrode according to one embodiment of the present invention. FIG. 2 is an image of a catalyst electrode manufactured in an embodiment of the present invention taken with a digital camera, (a) a catalyst electrode manufactured in Example 2, (b) a catalyst electrode manufactured in Example 3, (c) a catalyst electrode manufactured in Example 1, and (d) a catalyst electrode manufactured in Example 4. Hereinafter, the present invention will be described in more detail based on preferred embodiments of the present invention. However, the following embodiments are merely examples to aid in understanding the present invention, and the scope of the present invention is not reduced or limited by these examples. Embodiments of the present invention are described below with reference to the attached drawings so that those skilled in the art can easily implement them. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. In addition, to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification have been given similar reference numerals. Throughout the entire specification, when a part is described as being "connected" to another part, this includes not only cases where they are "directly connected," but also cases where they are "electrically connected" with other members in between. Throughout the entire specification, when a component is described as being located "on," "on top," "on top," "und