Regarding fuel cells, China has proposed in "Made in China 2025" that by 2020, the quality control and guarantee capability for the mass production of key materials for fuel cells will be realized; by 2025, the supporting infrastructure for hydrogen production and hydrogenation will be basically improved. Fuel cell vehicles achieve small-scale operation in the region.
Fuel cell vehicles, whether it is zero pollution in environmental protection, or short energy supply (hydrogenation) and long driving range, are beyond the reach of other new energy vehicles. However, due to the current high technical and industrial barriers and the lack of key technologies, the high cost burden of fuel cells, the use of expensive proton exchange membranes, the use of precious metal platinum as a catalyst, and the higher processing costs of graphite bipolar plates make hydrogen The cost and price of fuel cell models are much higher than those of ordinary fuel buses and other electric vehicles, which has affected the commercialization process.
He Weidong, a professor at the University of Electronic Science and Technology, said at the Fuel Cell Symposium that even so, the existing and potential fuel cell markets in the domestic market are huge, including aerospace, electric vehicle backup power, and drones for fuel cells. At the same time, national and local provinces and cities are inclined to the hydrogen fuel cell policy, and key technological breakthroughs are imperative.
Proton exchange membranes, which are an important part of fuel cells, are also key. For the development of this technology, He Weidong said that fuel cell stacks (mainly including bipolar plates, proton exchange membranes, and catalysts) are basically dependent on imports. In particular, the key core materials of proton exchange membrane fuel cells are technically backward with the United States, Germany and Japan, and the highest quality proton exchange membranes have long been monopolized by DuPont.
He Weidong said that the key to proton exchange membranes lies in the conductivity of protons and ions. The research team, with the support of the state and Sichuan local governments and universities, has finally launched a new generation of proton exchange membranes with a lower level of research and experimentation. Cost and higher proton conductivity. And the proton exchange membrane has a proton conductivity of 1.78 times that of the DuPont model Nafion 117 proton exchange membrane. In terms of cost, compared with the current market, the price of mainstream products can be reduced by about 10 times, and it can be about 10 yuan per square centimeter. (DuPont Nafion PFSA films and dispersions are ideal for a wide range of energy storage and automotive applications due to their outstanding energy output and durability. The DuPont Research continues to innovate in the fuel cell industry with the introduction of DuPont Films, DuPont, USA Membrane and film products provide a combination of chemical and mechanical properties for a wide range of applications and process technologies, including home electronics, fuel cells, aerospace, automotive, and industrial applications.
Proton exchange membrane developed by He Weidong team for 1 year
Although fuel cells have major disadvantages, such as high cost of platinum catalysts, slow discharge initiation, and poor battery system stability. However, it has the advantages of high conversion rate (>60%), low pollutant discharge, and various fuel gases (hydrogen, methane, alcohol, etc.). In terms of conversion rate, there are still dozens of percentage points of capacity loss to be tapped and further improved.
And why did He Weidong, who worked at the University of Electronic Science and Technology after returning from the United States, choose a proton exchange membrane in a fuel cell instead of a platinum catalyst? With his inherent scientific temperament, he is blunt, and the platinum catalyst in the fuel cell structure is a problem that cannot be circumvented in the international arena, mainly because of cost control. The main technical improvement point is to reduce the amount of platinum and increase it. Its contact area finds the combination of size and performance stability. (The catalyst mainly acts on the surface and the inside does not work.) Theoretically speaking, the smaller the particle, the better the activity and the catalytic effect is enhanced. However, the problem is that it is so small that it is easily poisoned by sulfides (containing in the air), and it is easy to adsorb sulfides, so that the catalytic effect is greatly reduced. Second, platinum metal is the FCC crystal structure (face-centered cubic cells, each containing 4 metal atoms.) Which surface is difficult to control outside.
For the proton exchange membrane, he said that through long-term investigation, it has been found that the powder and slurry of the proton exchange membrane have been well prepared in China. It also has core technical advantages in the international arena, energy loss analysis technology based on gas diffusion test, battery material technology based on electrophoresis and original film material process. In addition, the current fuel cell materials and testing problems are mainly two points. First, the test devices are only suitable for solid oxide fuel cells. The operating temperature is above 500 degrees Celsius, and the thickness of the battery material is controlled at about 10 microns. Both the rate and the shape controllability of the hole are not good. The improvement is to reduce the test temperature, and the high temperature test is extended to the low temperature test of the proton exchange membrane fuel cell (power fuel cell); the porosity and pore morphology of the material are improved. Controllability of thickness.
On the one hand, the technological innovation of core components including proton exchange membranes, on the other hand, in the research and development of hydrogen fuel cell models, domestic scientific research institutions and manufacturing companies have been exploring, in the development and research of the past decade, China's hydrogen Fuel cell models have also made some progress. From Yutong, a new generation of hydrogen fuel cell buses will be launched, and orders for 100 hydrogen fuel cell buses will be obtained from Futian Ouhui Bus, and 28 hydrogen fuel buses will be operated in Foshan and Yunfu, Guangdong. Both indicate that the hydrogen fuel cell passenger car is gradually entering commercial operation.
Introduction to He Weidong:
In 2007, he graduated from Harbin Institute of Technology with a major in applied chemistry. In 2012, he graduated from the Materials Department of Vanderbilt University in the United States, and then worked as a postdoctoral researcher in the Northwest National Laboratory. In 2013, he joined the School of Energy Science and Engineering as a professor and doctoral tutor. He was selected as an expert in the “Hundred Talents Program†of the University of Electronic Science and Technology and the “Thousand Talents Program†of Sichuan Province. He has long been engaged in academic cooperation in the field of energy with internationally renowned scientists such as John B. Goodenough (inventor of lithium battery inventors). The author of the ** is the publishing house of International Publishing House Springer and other three monographs, and published nearly 100 papers in international journals. Many of them are invited cover, special issue and review papers. Hosted several international original patent technologies for research and development and industrial production. He has presided over a number of scientific and technological research and development projects such as the National Natural Science Foundation of China, the key projects of the central colleges and universities, the “** Cultivation Plan†of the University of Electronic Science and Technology, and the Science and Technology Support Program of Sichuan Province.
Aluminum Alloy 6000 Series Bar
Aluminum Alloy 6063/6061 Bar or 6063/6061 Rob is commonly used for pipe railings, furniture, windows, stair rails, and in pipe railing. It has a high resistance to corrosion with excellent finishing characteristics. Aluminum 6063/6061 has average machinability and forming hot or cold is acceptable. Also Aluminum 6063/6061 Bar is used for electrical applications in T5, T52 & T6 due to its electrical conductivity.
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3.Suface treatment: Anodizing, polishing, turning ,power coating, mill finish etc
4.Equipment: CNC ,extruding machine, cold drawn machine, heating oven, straightening machine, cutting machine
5.Mechanical Properties
Mechanical Properties of 6063 |
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Temper |
Tensile |
Hardness |
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|
Ultimate |
Yield |
Elongation |
Brinell |
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|
KSI |
MPA |
KSI |
MPA |
% |
|
T5, T52 |
27 |
186 |
21 |
145 |
12 |
60 |
T6 |
35 |
241 |
31 |
214 |
12 |
73 |
Mechanical Properties of 6061 |
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Temper |
Tensile |
Hardness |
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|
Ultimate |
Yield |
Elongation |
Brinell |
||
|
KSI |
MPA |
KSI |
MPA |
% |
|
T6, T651 |
45 |
310 |
21 |
145 |
25 |
65 |
6. STANDARD PACKING:Wooden case/carton
7. Trade Terms
1) Payment: 30% T/T in advance, 70% balance pay before delivery. L/C at sight.
2) Delivery time: 20 days after deposit receiverd. If opening mould, plus 7-10 days.
3) Trade Term can be chosen depending on your requirements.
4) FOB Port: Shanghai
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