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supercapacitor - Shanmugam IAS academy in coimbatore
supercapacitor

WEARABLE SUPERCAPACITOR

What’s in news?

A wearable supercapacitor has been fabricated that can store and deliver large amount of electrical energy, exceeding other similar devices.

Key data’s:

  • Researchers at the Indian Institute of Technology (IIT) Bombay have fabricated a wearable supercapacitor that can store and deliver large amount of electrical energy, exceeding other similar devices. 
  • The Department of Chemistry at IIT Bombay and the lead author of a paper published in the journal ACS Applied Materials and Interfaces.
  • The wearable energy storage device can be stitched on to any fabric and can deliver power ranging from microwatt to milliwatt.
  • The energy stored in the device can power GPS location-based transmitters or a 1.8-volt LED.
  • The electrode of the capacitor was fabricated by uniformly coating cotton yarn with carbon nanotubes (CNTs). The coating is done by dipping the yarn into carbon nanotube ink, where the CNTs are dispersed in water using a surfactant (detergent).
  • The yarns coated with carbon nanotubes exhibited a finite electrical conductivity.
  • The laminated supercapacitor demonstrated unchanged performance even when subjected to extreme and harsh mechanical testing.
  • The combination of mobile ions in the electrolyte and better interface between the wire and the electrolyte increases the capacity to store electrical energy.

Working of this supercapacitor:

  • When the supercapacitor is integrated with a piezoelectric energy generator then it will become completely self-sustaining. And when stitched to the fabric, the supercapacitor can be used for powering GPS location-based devices or a LED lamp or even charge small electronic devices.
  • The coating of the electrode by carbon nanotube ink converts the electrical insulating yarn into a metallic conductor.

 Application:

  • This is possibly the first demonstration of a wearable device that can withstand rigorous washing conditions.
  • Energy stored in just nine capacitors can power a LED of 1.8 volts.
  • The energy stored in the device can power GPS location-based transmitters or a 1.8-volt LED.
  • Depending on the application, we can increase the number of capacitors made in a small area and integrate to increase the total amount of energy stored in the system.

Supercapacitor:

  • A supercapacitor (SC) is a high-capacity capacitor with capacitance values much higher than other capacitors (but lower voltage limits) that bridge the gap between electrolytic capacitors and rechargeable batteries.
  • Supercapacitors are used in applications requiring many rapid charge/discharges cycles rather than long term compact energy storage: within cars, buses, trains, cranes and elevators, where they are used for regenerative braking, short-term energy storage or burst-mode power delivery.

Important Links:

https://www.techiexpert.com/iit-bombay-to-hold-wearable-super-capacitor/

https://www.thehindu.com/sci-tech/science/iit-bombay-fabricates-wearable-supercapacitor/article27172600.ece

https://en.wikipedia.org/wiki/Supercapacitor

https://www.iasipstnpsc.in/new-solar-supercapacitor-could-power-future-of-wearable-sensors/

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