Pohang University of Science and Technology in South Korea develops a new catalyst to overcome the corrosion problem of hydrogen fuel vehicle batteries -Lithium - Ion Battery Equipment
When a bike gets wet in the rain, the frame and chain can corrode or rust, shortening the life of the bike, so regular oiling is required to prevent this from happening. Batteries are devices that move electrons to generate electricity by triggering oxidation and reduction reactions, respectively, but can also corrode when exposed to oxygen. So, does lubricating a battery prevent rust?
On August 13th, according to foreign media reports, a research team led by Yong-TaeKim, a professor of materials science and engineering at Pohang University of Technology (POSTECH), and doctoral student SangMoonJung, used a catalyst that combined platinum and hydrogen tungsten bronze. (Pt/HxWO3), which solves the corrosion problem of the fuel cell when the hydrogen fuel vehicle is not in use. Such catalysts have been shown to promote the oxidation of hydrogen and selectively inhibit the oxygen reduction reaction (ORR).
As environmentally friendly hydrogen vehicles become more common, the race to improve fuel cell performance is becoming more intense around the world. Fuel cells are the core of hydrogen fuel vehicles. Compared to power generation fuel cells that don't stop once they're started, automotive fuel cells will have very low performance because they stop working intermittently. When the car ignition is turned off, the oxygen reduction reaction occurs, air is temporarily introduced to the anode of the battery, and the corrosion of the cathode components is accelerated as the cathode potential surges instantaneously.(Lithium - Ion Battery Equipment)
The research team focused on the metal-insulator transition (MIT) phenomenon, which can selectively change the electrical conductivity of a material according to the surrounding environment to solve the degradation problem of automotive fuel cells.
The researchers focused in particular on tungsten oxide (WO3). In general, tungsten oxide is used as an electrochromic material that can change conductivity by intercalating and reducing protons. When the car is working normally, the MIT phenomenon of tungsten oxide is used to generate an electrode reaction while maintaining the transition of H-WO3 (conductor) by inserting a proton. Then, when the car ignition is off, the mixed air is introduced to increase the oxygen pressure and turn it into WO3 (secondary conductor) to stop the electrode reaction, thus solving the problem of cathode corrosion.
Durability of this metal-insulator transition-generated Pt/HxWO3 selective hydrogen oxidation reaction (HOR) catalyst when the car is switched off compared to conventional commercial Pt/C catalyst materials in MEA automotive battery evaluation more than 2 times higher.
Professor Yong-Tae Kim, who led the research, said: "This research has greatly improved the durability of automotive fuel cells, and such research results are expected to further promote the commercialization of hydrogen fuel vehicles." China Machine Vehicle Technical Service Center
On August 13th, according to foreign media reports, a research team led by Yong-TaeKim, a professor of materials science and engineering at Pohang University of Technology (POSTECH), and doctoral student SangMoonJung, used a catalyst that combined platinum and hydrogen tungsten bronze. (Pt/HxWO3), which solves the corrosion problem of the fuel cell when the hydrogen fuel vehicle is not in use. Such catalysts have been shown to promote the oxidation of hydrogen and selectively inhibit the oxygen reduction reaction (ORR).
As environmentally friendly hydrogen vehicles become more common, the race to improve fuel cell performance is becoming more intense around the world. Fuel cells are the core of hydrogen fuel vehicles. Compared to power generation fuel cells that don't stop once they're started, automotive fuel cells will have very low performance because they stop working intermittently. When the car ignition is turned off, the oxygen reduction reaction occurs, air is temporarily introduced to the anode of the battery, and the corrosion of the cathode components is accelerated as the cathode potential surges instantaneously.(Lithium - Ion Battery Equipment)
The research team focused on the metal-insulator transition (MIT) phenomenon, which can selectively change the electrical conductivity of a material according to the surrounding environment to solve the degradation problem of automotive fuel cells.
The researchers focused in particular on tungsten oxide (WO3). In general, tungsten oxide is used as an electrochromic material that can change conductivity by intercalating and reducing protons. When the car is working normally, the MIT phenomenon of tungsten oxide is used to generate an electrode reaction while maintaining the transition of H-WO3 (conductor) by inserting a proton. Then, when the car ignition is off, the mixed air is introduced to increase the oxygen pressure and turn it into WO3 (secondary conductor) to stop the electrode reaction, thus solving the problem of cathode corrosion.
Durability of this metal-insulator transition-generated Pt/HxWO3 selective hydrogen oxidation reaction (HOR) catalyst when the car is switched off compared to conventional commercial Pt/C catalyst materials in MEA automotive battery evaluation more than 2 times higher.
Professor Yong-Tae Kim, who led the research, said: "This research has greatly improved the durability of automotive fuel cells, and such research results are expected to further promote the commercialization of hydrogen fuel vehicles." China Machine Vehicle Technical Service Center
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