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
Engineering
Energy engineers and material scientists are continuously trying to create safe battery technologies that exhibit higher energy densities and efficiencies, along with longer life cycles. As lithium-ion batteries (LiBs) are ...
Energy & Green Tech
A team led by Prof. Chen Wei, Prof. Jiang Hailong and Prof. Li Zhenyu from the University of Science and Technology of China (USTC) adopted NH2-functionalized metal-organic frameworks (MOFs) in lithium-chlorine (Li-Cl2) batteries ...
Apr 6, 2023
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4
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
Energy & Green Tech
Lithium-ion batteries are used not only for small consumer electronics like cell phones and laptops, but also for electric bicycles, electric vehicles and long-term power storage. Though a rare occurrence, lithium-ion batteries ...
Apr 4, 2023
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10
Energy & Green Tech
To meet rising energy demands and power the countless electronic devices on the market, researchers will need to develop new advanced battery technologies. These technologies should ideally have higher energy densities and ...
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
Energy & Green Tech
Currently, most cathode materials used in batteries for electric vehicles are layered oxides composed of nickel for over 60% of the transition metals. Using nickel-rich layered oxide is advantageous in establishing the mileage ...
Feb 8, 2023
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3
Energy & Green Tech
To support the operation of the countless electronic devices that are being developed every day, researchers will need to develop increasingly advanced battery technologies. Lithium-ion batteries (LiBs), some of the most ...
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
