Internal Asymmetric Tandem Supercapacitor for High Working Voltage along with Superior Rate Performance

Boruah, Buddha Deka and Misra, Abha (2017) Internal Asymmetric Tandem Supercapacitor for High Working Voltage along with Superior Rate Performance. In: ACS ENERGY LETTERS, 2 (8). pp. 1720-1728.

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Abstract

An asymmetric tandem supercapacitor (ATSC) is fabricated for the first time by using a unique hybrid nanocomposite for a wider working voltage. The as-fabricated flexible ATSC displays a much higher working voltage of 4.5 V and hence efficient energy density as well as power density, which are 61% and 33% higher than those of the single asymmetric supercapacitor, respectively. The ATSC displays high capacitance stability over large working voltage of 4.5 V with 97% capacitance retention after 5000 charging-discharging cycles. In addition, a stable capacitive response is maintained during the flexible bending, and a constant capacitive response is maintained even at a much higher scan rate of 5000 mV/s. Moreover, the ATSC could be easily coupled with a photodetector to provide stable power during the detection of multiple illumination signals. Therefore, results suggest that ATSCs are a promising energy storage device with efficient power and energy density and a much wider working voltage of 4.5 V.

Item Type:	Journal Article
Publication:	ACS ENERGY LETTERS
Additional Information:	Copy right for this article belongs to the AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	09 Sep 2017 04:41
Last Modified:	09 Sep 2017 04:41
URI:	http://eprints.iisc.ac.in/id/eprint/57765

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