Supercapacitors

25.07.2024

Supercapacitors

Why in the news?                        

The researchers of the Government College for Women, Thiruvananthapuram, have devised a method to produce activated carbon, suitable for supercapacitor fabrication, from coconut husks, a major agricultural residue in Kerala.

About Supercapacitors:

• It is a next-generation energy storage device which is also known as an ultracapacitor.​
• It has advantages such as high-power density, long durability, and ultrafast charging characteristics as compared to conventional capacitors and Lithium-Ion batteries (LIB).
• The main components of supercapacitors include an electrode, electrolyte, separator and current collector.
• An electrode is a solid electric conductor that carries electric current into non-metallic solids, liquids, gasses, plasmas or vacuums.
• An electrolyte is a substance that produces an electrically conducting solution when dissolved in a polar solvent, such as water.

Key findings

• It is found that the prototype supercapacitors made of coconut husk-derived activated carbon to be four-times more efficient that the existing supercapacitors.
• This innovative method not only saves time, but also yields activated carbon with an impressive surface area of 1,200 m2 g-1 and highly porous structures, making it an ideal material for various applications.
• The device’s high-power output is capable of powering two LEDs for 20 minutes.

What is a microwave-assisted method?

• It is relatively inexpensive and exhibits exceptional supercapacitor capability.
• By utilizing an advanced microwave pyrolysis reactor one can produce high-quality carbon within five minutes, eliminating impurities like ash and generating zero waste.

                                                                Source: The Hindu

Ques :- Consider the following statements regarding the Supercapacitors:

Statement-I

It is a next-generation energy storage device which is also known as an ultracapacitor.

Statement-II

 The main components of supercapacitors include an electrode, electrolyte, separator and current collector.

Which one of the following is correct in respect of the above statements?

A.Both Statement-I and Statement-II are correct, and Statement-II is the correct explanation for Statement-I.

B.Both Statement-I and Statement-II are correct, and Statement-II is not the correct explanation for Statement-I.

C.Statement-I is correct, but Statement-II is incorrect.

D.Statement-I is incorrect, but Statement-II is correct.

Answer A