Energy & Green Tech
The element lithium is used widely in batteries because it results in long-lasting, stable energy storage. However, it's a finite resource, so researchers are hard at work trying to identify alternate materials to use in ...
Jul 11, 2024
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33
Energy & Green Tech
As the demand for smartphones, electric vehicles, and renewable energy continues to rise, scientists are searching for ways to improve lithium-ion batteries—the most common type of battery found in home electronics and ...
Jun 14, 2018
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690
Energy & Green Tech
A combined team of researchers from the U.S. Advanced Battery Consortium (USABC) and battery maker A123 Systems has developed a new way to reclaim some of the materials from the cathodes that are used in lithium batteries, ...
Energy & Green Tech
A multi-institution team of scientists led by Texas A&M University chemist Sarbajit Banerjee has discovered an exceptional metal-oxide magnesium battery cathode material, moving researchers one step closer to delivering batteries ...
Feb 5, 2018
2
288
Energy & Green Tech
Lithium-based batteries use more than 50 percent of all cobalt produced in the world. These batteries are in your cell phone, laptop and maybe even your car. About 50 percent of the world's cobalt comes from the Congo, where ...
Apr 11, 2018
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76
Energy & Green Tech
In the quest for the perfect battery, scientists have two primary goals: create a device that can store a great deal of energy and do it safely. Many batteries contain liquid electrolytes, which are potentially flammable.
Feb 14, 2022
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199
Energy & Green Tech
Battery-powered vehicles have made a significant dent in the transportation market. But that market still needs lower cost batteries that can power vehicles for greater ranges. Also desirable are low-cost batteries able to ...
Mar 24, 2022
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95
Energy & Green Tech
Operational reliability, durability and high energy density: In these respects, solid-state batteries are superior in principle to conventional liquid electrolyte lithium-ion batteries. Some of the problems standing in the ...
Jan 3, 2023
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87
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
Lithium-ion batteries (LiBs), rechargeable batteries that store energy by leveraging the reversible reduction of Li ions, remain among the most widely used battery technologies worldwide. These batteries power a wide range ...
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
