Cidetec Technology Centre’s Energy Department has designed a prototype for a motorised bicycle that works off fuel cells. The project, financed by the Gipuzkoa Provincial Government, involved using a bicycle kindly provided by the ORBEA bicycle manufacturing company and the pedalling action of which is assisted by a motor. The novelty lies in that the battery power source for the motor is substituted by a fuel cell which, for its operation, only needs oxygen from the air and hydrogen contained under pressure in a small tank.
The fuel cell employed is of the PEMFC (polymer electrolyte membrane fuel cell) type, a technology considered to be cutting edge in this field. The fuel cell is, in reality, a series of numerous MEAs (membrane-electrode assembly) layered one on top of each other in order to reach useful power values, given that the voltage generated by each MEA is less than 1 V.
Each MEA is made up of an anodic electrode, where hydrogen molecules break up into protons and electrons. The membrane used enables the passage of protons, but not electrons, thus obliging the latter to travel around an exterior electric circuit made up of the equipment itself that is being supplied with power. Finally, at the cathodic electrode, the electrons recombine with oxygen from air, thus producing water. This involves an electrochemical reaction that does not generate any contaminating waste; there is, thus, no combustion.
Irati Kortabitarte | alfa
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Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
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COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.
Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...
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