Energy & Green Tech
Lithium ion batteries are a bit famous for their poor cold-weather performance, and that has consequences for some of their most important applications—everything from starting an electric car in a Wisconsin winter to flying ...
Aug 26, 2021
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372
Energy & Green Tech
In our future electrified world, the demand for battery storage is projected to be enormous, reaching to upwards of 2 to 10 terawatt-hours (TWh) of annual battery production by 2030, from less than 0.5 TWh today. However, ...
Jun 23, 2021
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163
Energy & Green Tech
Only 2% of vehicles are electrified to date, but that is projected to reach 30% in 2030. A key toward improving the commercialization of electric vehicles (EVs) is to heighten their gravimetric energy density—measured in ...
Jun 18, 2021
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Engineering
Scientists at Oak Ridge National Laboratory have developed a solvent that results in a more environmentally friendly process to recover valuable materials from used lithium-ion batteries, supports a stable domestic supply ...
Jun 2, 2021
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5
Energy & Green Tech
Scientists at Skoltech Center for Energy Science and Technology have developed an enriched and scalable approach for increasing the capacity of a broad range of metal-ion battery cathode materials. These findings, published ...
May 17, 2021
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28
Engineering
The promotion of electric cars has dramatically increased the demand for lithium-ion batteries. However, cobalt and nickel, the main cathode materials for the batteries, are not abundant. If the consumption continues, it ...
Apr 1, 2021
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54
Energy & Green Tech
Many automotive companies worldwide are currently investing in the development of electric vehicles, which could help to reduce greenhouse gas emissions. Electric vehicles require large rechargeable batteries that exhibit ...
Energy & Green Tech
A new paper from associate professor Jiandi Wan's group in the UC Davis Department of Chemical Engineering, published in Science Advances, proposes a potential solution to dendrite growth in rechargeable lithium metal batteries. ...
Mar 2, 2021
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344
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 ...
Mar 1, 2021
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87
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
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
