Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 4, Issue 44, Pages 17552-17559Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta07829j
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Funding
- Department of Science and Technology (DST) [DST-1272]
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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.
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