Why in news
Researchers at the Government College for Women, Thiruvananthapuram, have devised a method to produce activated carbon, suitable for supercapacitor fabrication, from coconut husks
The coconut husk biowaste-derived activated carbon holds immense promise for sustainable and efficient green solutions for high-performance supercapacitors owing to its availability, low cost, and eco-friendly nature.
Supercapacitors
A supercapacitor is an electrochemical energy storage device
It can be used to store and deliver charge by reversible adsorption and desorption of ions at the interface between the electrode material and electrolyte.
Supercapacitors are also called ultracapacitors or electrochemical capacitors.
Its uses
One of the earliest supercapacitor applications was as a backup to primary batteries
It can be found in uninterruptable power supplies (UPSs), wireless alarm systems, smart meters, and even solid-state drives (SSDs).
Widely used to provide power in pulse applications, telemetry, peak power assist and electronic locks
Now commonly used as energy harvesters to capture and store collected energy from solar cells, wind turbines, ocean waves and other external sources to power low-energy electronics
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