Energy & Green Tech
Scientists based at the University of Oxford as part of the Faraday Institution CATMAT project researching next-generation cathode materials have made a significant advance in understanding oxygen-redox processes involved ...
10 hours ago
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41
Energy & Green Tech
High energy storage batteries for EVs need high capacity battery cathodes. New lithium-excess manganese-rich cathodes are expected to replace existing nickel-rich cathodes but understanding how the manganese and oxygen accommodate ...
Feb 18, 2021
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143
Electronics & Semiconductors
In the face of the surging demand for lithium-ion batteries and limited lithium reserves, scientists are searching for alternatives to the lithium technology. Russian researchers from Skoltech, D. Mendeleev University, and ...
Jan 18, 2021
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54
Energy & Green Tech
All-solid-state batteries are next-generation batteries that can simultaneously improve the stability and capacity of existing lithium batteries. The use of non-flammable solid cathodes and electrolytes in such batteries ...
Jan 11, 2021
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7
Energy & Green Tech
Oak Ridge National Laboratory researchers have developed a new family of cathodes with the potential to replace the costly cobalt-based cathodes typically found in today's lithium-ion batteries that power electric vehicles ...
Dec 19, 2020
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319
Electronics & Semiconductors
Recently, there have been a number of electric vehicle (EV) battery fire incidents. Unlike the batteries used in small mobile devices, such as smartphones, the battery pack of an EV is composed of hundreds of battery cells, ...
Dec 04, 2020
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20
Energy & Green Tech
A new process for restoring spent cathodes to mint condition could make it more economical to recycle lithium-ion batteries. The process, developed by nanoengineers at the University of California San Diego, is more environmentally ...
Nov 12, 2020
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77
Energy & Green Tech
Researchers in WMG and the Department of Physics at the University of Warwick have found that asymmetric stresses within electrodes used in certain wearable electronic devices provides an important clue as to how to improve ...
Aug 25, 2020
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14
Energy & Green Tech
Lithium-ion batteries are recognized for their high energy density in everything from mobile phones to laptop computers and electric vehicles, but as the need for grid-scale energy storage and other applications becomes more ...
Jul 17, 2020
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69
Energy & Green Tech
For decades, researchers have looked for ways to eliminate cobalt from the high-energy batteries that power electronic devices, due to its high cost and the human rights ramifications of its mining. But past attempts haven't ...
Jul 15, 2020
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627
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
