Energy & Green Tech
A research group has developed a prototype calcium (Ca) metal rechargeable battery capable of 500 cycles of repeated charge-discharge—the benchmark for practical use.
May 23, 2023
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121
Energy & Green Tech
A team led by Prof. Song Li from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) proposed the concept of intercalant-induced V t2g orbital occupation and developed an NH4+-intercalated ...
May 8, 2023
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319
Energy & Green Tech
Nickel-zinc (Ni-Zn) batteries are a promising technology due to their high output voltage, high theoretical specific energy, high safety and low cost. However, rechargeable alkaline Ni-Zn batteries are challenging, because ...
Apr 26, 2023
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287
Energy & Green Tech
Lithium-ion batteries are currently the gold standard in battery technology, but as the demand for safe and effective batteries increases, researchers are racing to find what's next.
Apr 6, 2023
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64
Energy & Green Tech
Solid-state lithium-sulfur batteries offer the potential for much higher energy densities and increased safety, compared to conventional lithium-ion batteries. However, the performance of solid-state batteries is currently ...
Apr 5, 2023
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120
Engineering
A new North Carolina State University study, performed in collaboration with battery testing researchers at the U.S. Department of Energy's Oak Ridge National Laboratory, shows that extremely short pulses from a high-powered ...
Feb 8, 2023
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158
Engineering
From the moment you first use it, a new lithium-ion battery is degrading. After a few hundred charge cycles, you'll notice—your phone, laptop or electric car battery wears out more quickly. Eventually, it stops holding ...
Dec 22, 2022
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110
Energy & Green Tech
High energy density lithium-ion (Li-ion) batteries are indispensable for powering electric and hybrid vehicles, next-generation electronics, and power grids. These Li-ion batteries contain high energy density cathodes based ...
Nov 30, 2022
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69
Engineering
Researchers at the Hong Kong University of Science and Technology (HKUST) have designed an innovative iron-based cathode material to achieve record performance for protonic ceramic fuel cells, marking a significant step forward ...
Nov 17, 2022
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49
Energy & Green Tech
Researchers at the University of California, Irvine and four national laboratories have devised a way to make lithium-ion battery cathodes without using cobalt, a mineral plagued by price volatility and geopolitical complications.
Sep 21, 2022
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790
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
