Issue 44, 2016

A flexible ternary oxide based solid-state supercapacitor with excellent rate capability

Abstract

A porous vanadium doped-zinc–nickel–cobalt ternary oxide (VZnNiCo) nanostructure is presented for a high performance flexible supercapacitor (SC). The symmetric solid-state SC demonstrated a remarkable enhancement in the capacitive response as compared to SCs based on its individual oxide constituents e.g. NiCo2O4//NiCo2O4 or ZnNiCo//ZnNiCo. A synergistic redox reaction from all the ions was offered to increase the capacitive response and moreover, direct growth of the unique porous nanostructure on a flexible current collector exhibited excellent ion-diffusion efficiency with a high electrochemically active surface area. The flexible SC demonstrated excellent capacitive response stability towards large mechanical deformations for a much higher scan rate up to 5000 mV s−1 in addition to high cycling stability. Hence, the present work opens novel avenues towards exploiting hybrid flexible energy storage devices that are mechanically robust with a highly stable capacitive ability at a much higher scan rate.

Graphical abstract: A flexible ternary oxide based solid-state supercapacitor with excellent rate capability

Supplementary files

Article information

Article type
Paper
Submitted
09 Sep 2016
Accepted
13 Oct 2016
First published
14 Oct 2016

J. Mater. Chem. A, 2016,4, 17552-17559

A flexible ternary oxide based solid-state supercapacitor with excellent rate capability

B. D. Boruah and A. Misra, J. Mater. Chem. A, 2016, 4, 17552 DOI: 10.1039/C6TA07829J

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