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This Letter describes a microfabricated fuel cell (MFC) that uses hydrogen as fuel and a polymer proton exchange membrane as electrolyte. Microchannels have been etched in highly conductive silicon, and silicon nanograss (black silicon) has been formed on the surface; thus implementing a support structure, current collector, flowfield and gas diffusion layer all in one. The devices are thus very compact,...
This study presents the investigation on the magnetic force phenomenon in permanent magnet (PM) wind turbine generators. Owing to the presence of PMs, the inherent and ever-existing magnetic force between the stator and rotor becomes one of the most critical phenomena in these generators. Whether it is during the assembly process throughout the manufacturing stages or when the generator is in operation,...
We have developed a silicon microfabricated PEM fuel cell which uses hydrogen as fuel. The device employs flow channels with dual structure: isotropic plasma etching has been used for defining the large channels and gas conduits, and anisotropic plasma etching under passivating conditions (high concentration of oxygen in SF6) has been used to create silicon nanograss (black silicon) to increase surface...
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