Science, Space and Technology News 2023
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A novel ultramicro supercapacitor showcases superior energy storage and a potential revolution in device power sources. Researchers at the Department of Instrumentation and Applied Physics , Indian Institute of Science , have designed a novel ultramicro supercapacitor, a tiny device capable of storing an enormous amount of electric charge. It is also much smaller and more compact than existing supercapacitors and can potentially be used in many devices ranging from streetlights to consumer electronics, electric cars, and medical devices.
Most of these devices are currently powered by batteries. However, over time, these batteries lose their ability to store charge and therefore have a limited shelf-life. Capacitors, on the other hand, can store electric charge for much longer, by virtue of their design. For example, a capacitor operating at 5 volts will continue to operate at the same voltage even after a decade. But unlike batteries, they cannot discharge energy constantly – to power a mobile phone, for example.
“The design is the critical part, because you are integrating two systems,” says Misra. The two systems are the two FET electrodes and the gel electrolyte, an ionic medium, which have different charge capacities. Vinod Panwar, PhD student at IAP and one of the lead authors, adds that it was challenging to fabricate the device to get all the ideal characteristics of the transistor right.
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