Tailoring NiCoCu layered double hydroxide with Ag-citrate/polyaniline/functionalized SWCNTs nanocomposites for supercapacitor applications

Supercapacitors have substantially altered the landscape of sophisticated energy storage devices with their exceptional power density along with prolonged cyclic stability. On the contrary, their energy density remains low, requiring research to compete with conventional battery storage devices. Thi...

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Bibliographic Details
Published in:	RSC advances Vol. 14; no. 2; pp. 14438 - 14451
Main Authors:	Abdullah, Syed Muhammad, Marwat, Mohsin Ali, Adam, Kanwar Muhammad, Din, Zia Ud, Humayun, Muhammad, Abdul Karim, Muhammad Ramzan, Ghazanfar, Esha, Bououdina, Mohamed, Hamayun, Umaima, Youssef, Mahmoud Saber, Ali, Hafiz Tauqeer
Format:	Journal Article
Language:	English
Published:	England Royal Society of Chemistry 25-04-2024 The Royal Society of Chemistry
Subjects:	Chemistry Electrochemical analysis Electrodes Energy storage Hydroxides Nanocomposites Polyanilines Stability Storage capacity Supercapacitors
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Summary:	Supercapacitors have substantially altered the landscape of sophisticated energy storage devices with their exceptional power density along with prolonged cyclic stability. On the contrary, their energy density remains low, requiring research to compete with conventional battery storage devices. This study addresses the disparities between energy and power densities in energy storage technologies by exploring the integration of layered double hydroxides (LDH) and highly conductive materials to develop an innovative energy storage system. Four electrodes were fabricated via a hydrothermal process using NiCoCu LDH, Ag-citrate, PANI, and f-SWCNTs. The optimal electrode demonstrated exceptional electrochemical properties; at 0.5 A g −1 , it possessed specific capacitances of 807 F g −1 , twice as high as those of the pure sample. The constructed asymmetric supercapacitor device attained energy densities of 62.15 W h kg −1 and 22.44 W h kg −1 , corresponding to power densities of 1275 W kg −1 and 11 900 W kg −1 , respectively. Furthermore, it maintained 100% cyclic stability and a coulombic efficiency of 95% for 4000 charge-discharge cycles. The concept of a supercapacitor of the hybrid grade was reinforced by power law investigations, which unveiled b -values in the interval of 0.5 to 1. This research emphasizes the considerable potential of supercapacitor-grade NiCoCu LDH/Ag-citrate-PANI-f-SWCNTs nanocomposites for superior rate performance, robust cycle stability, and enhanced energy storage capacity. A schematic of the charge storage mechanism in a novel NiCoCu layered double hydroxide/Ag-citrate-polyaniline-functionalized single-walled carbon nanotubes nanocomposite electrode material.
Bibliography:	https://doi.org/10.1039/d4ra01324g Electronic supplementary information (ESI) available. See DOI ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Equal contribution.
ISSN:	2046-2069 2046-2069
DOI:	10.1039/d4ra01324g