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Taking sieving lessons from nature

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Scientists use diamonds to generate better accelerator beams

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Batteries mimic mammal bones for stability

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Scientists find new way to measure important beam property

For a wide variety of high-powered scientific instruments, from free-electron lasers to wakefield accelerators to electron microscopes, generating a bright electron beam that has specific properties represents one of the ...

Computer vision helps scientists study lithium ion batteries

Lithium-ion batteries lose their juice over time, causing scientists and engineer to work hard to understand that process in detail. Now, scientists at the Department of Energy's SLAC National Accelerator Laboratory have ...

Scientists develop a new cathode material for metal-ion batteries

Researchers from the Skoltech Center for Energy Science and Technology (CEST) created a new cathode material based on titanium fluoride phosphate, which achieved superior energy performance and stable operation at high discharge ...

Cathode 'defects' improve battery performance

Engineers strive to design smartphones with longer-lasting batteries, electric vehicles that can drive for hundreds of miles on a single charge, and a reliable power grid that can store renewable energy for future use. Each ...

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A cathode is an electrode through which electric current flows out of a polarized electrical device. Mnemonic: CCD (Cathode Current Departs).

Cathode polarity is not always negative. Although positively charged cations always move towards the cathode (hence their name) and/or negatively charged anions move away from it, cathode polarity depends on the device type, and can even vary according to the operating mode. In a device which consumes power, the cathode is negative, and in a device which provides power, the cathode is positive:

An electrode through which current flows the other way (into the device) is termed an anode.

This text uses material from Wikipedia, licensed under CC BY-SA