Low-cost fuel cells are easy to manufacture, but the key issue is short life. Unlike other metals, platinum does not corrode in fuel cells, which greatly increases the life of the fuel cell. However, the price of platinum is still more expensive than gold. Now, GM fuel cells only use 30g of platinum, and the price is only 4,000 US dollars. The researchers used different metals for testing and eventually developed a fuel cell catalyst that has a long service life but at a lower cost. Researchers from South Korea, Case Western Reserve University, and Texas State have discovered a catalyst that can replace platinum and are inexpensive. Compared to platinum catalysts, the newly discovered graphene-iodine catalyst is more affordable and easier to produce. In addition, this new catalyst is also more stable and efficient. The researchers reacted various gases with graphene, including bromine gas, chlorine gas, and iodine gas, and found that the iodine test results were the best. During the experiment, the graphene-bromine catalyst can produce 7% less current than the platinum catalyst and 40% less graphene-chlorine catalyst, but the graphene-iodine catalyst can produce 33% more current than the platinum catalyst. In a further experiment, the researchers found that the graphene-iodine catalyst retained 87.4% of its capacity after 10,000 cycles, while the platinum catalyst remained only 62.5%. Finally, the researchers tested the methanol and carbon monoxide pollution. The researchers found that the performance of the platinum catalyst was severely affected, while the graphene-iodine catalyst remained in its normal working state. Perhaps this is the answer that fuel cell car manufacturers have been looking for. 1.cylindrical milling cutter End Mill,Roughing End Mill,Carbide Square Drill Bit,Coating Machine Tools Behappy Crafts (suzhou)Co.,Ltd , https://www.behappyindustry.com
Used for processing flat surfaces on horizontal milling machines. Cutter teeth are distributed on the circumference of the milling cutter, and are divided into straight teeth and spiral teeth according to tooth shape. According to the number of teeth and coarse teeth and two kinds of fine teeth. The helical tooth rough tooth milling cutter has fewer teeth, high tooth strength and large chip space, which is suitable for rough machining. Fine-tooth milling cutters are suitable for finishing.
2. face milling cutter
Also known as disc milling cutter, used for vertical milling machine, end milling machine or gantry milling machine processing plane, end face and circumference have cutter teeth, also have coarse teeth and fine teeth. The structure has three kinds: integral type, insert type and transferable type.
3. End milling cutter
Used for processing grooves and step surface, knife teeth in the circumference and end face, can not work along the axial feed. When the end mill has end teeth through the center, axial feed can be provided.
4. Three-side edge milling cutter
Used for processing all kinds of grooves and steps, its two sides and circumference are provided with cutter teeth.
5. Angle milling cutter
For milling grooves at a certain Angle, there are two kinds of single Angle and double Angle milling cutters.
6.Saw Blade milling cutter
Used for machining deep grooves and cutting off workpieces, there are more cutter teeth on the circumference. In order to reduce the friction during milling, there are 15 '~1° auxiliary Angle on both sides of the cutter teeth. In addition, there are keyway milling cutters, dovetail slot milling cutters, T - shaped slot milling cutters and various forms of milling cutters.