Energy & Green Tech

New material could pave way for better, safer batteries

In pursuit of batteries that deliver more power and operate more safely, researchers are working to replace the liquids commonly used in today's lithium ion batteries with solid materials. Now, a research team from Brown ...

Energy & Green Tech

How to make lithium-ion batteries invincible

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, ...

Engineering

Doubling the charging-recharging cycle of lithium batteries

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 ...

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Cathode

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