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Redox electrolyte mediated performance enhancement in aqueous zinc ion hybrid supercapacitors composed of spinel BaFe2O4 and cubic Cu2O.
- Source :
- Journal of Materials Chemistry C; 5/21/2024, Vol. 12 Issue 19, p6865-6880, 16p
- Publication Year :
- 2024
-
Abstract
- The conception and advancement of materials for highly efficient electrochemical energy storage devices is of critical importance. This paper propounds the convenient synthesis and rational unification of spinel BaFe<subscript>2</subscript>O<subscript>4</subscript> and polymer-mediated self-assembled cubic Cu<subscript>2</subscript>O for high-performance zinc-ion hybrid supercapacitors (ZHSCs). The electrochemical characteristics of ZHSC were investigated using two different electrolytes: conventional (C-ZHSC) and redox additive doped (potassium ferro cyanide K<subscript>4</subscript>[Fe (CN)<subscript>6</subscript>]) (Re-ZHSC). X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy analyses of wet-chemically generated materials validate concurrency with the literature. The specific surface area (SSA) of the BaFe<subscript>2</subscript>O<subscript>4</subscript>@Cu<subscript>2</subscript>O;18.29 m<superscript>2</superscript> g<superscript>−1</superscript> composite was increased roughly nine times above the SSA of Cu<subscript>2</subscript>O, 2.03 m<superscript>2</superscript> g<superscript>−1</superscript>, whereas the SSA of BaFe<subscript>2</subscript>O<subscript>4</subscript> was the greatest at 29.39 m<superscript>2</superscript> g<superscript>−1</superscript>. The electrochemical analysis revealed that the BaFe<subscript>2</subscript>O<subscript>4</subscript>@Cu<subscript>2</subscript>O hybrid had a maximal specific capacitance (Sc) of 803 F g<superscript>−1</superscript> at a current density of 1 A g<superscript>−1</superscript>. Furthermore, the composite demonstrated an expanded potential window of −1.2 to 0.42, contributing to its enhanced performance. However, the recorded maximum Scs and potential window of pristine materials Cu<subscript>2</subscript>O and BaFe<subscript>2</subscript>O<subscript>4</subscript> were just 462 F g<superscript>−1</superscript> and 0–0.42 volts and 593 F g<superscript>−1</superscript> and −1.2–0.42 volts, respectively, at the same current density. The assembled C-ZHSC achieved the highest Sc of 165 F g<superscript>−1</superscript> at a current density of 1 A g<superscript>−1</superscript> with a potential window of 0.8–2.2 volts. The recorded maximal energy (ED) and power densities were 45 W h kg<superscript>−1</superscript> and 27 W kg<superscript>−1</superscript>, respectively. Furthermore, the generated Re-ZHSC outperformed C-ZHSC in terms of Sc, ED, and PD by ∼2.5 (404 F g<superscript>−1</superscript> with a potential window of 0.6–2.2 volts), ∼3.2 (144 W h kg<superscript>−1</superscript>), and ∼1.4 (37.000 W kg<superscript>−1</superscript>) times, respectively. Furthermore, the cyclic stability of Re-ZHSC has shown a sixfold improvement (84%) compared to C-ZHSC (78%), with approximately 7% less dendrite formation. These results authenticate BaFe<subscript>2</subscript>O<subscript>4</subscript>@Cu<subscript>2</subscript>O as a considerably appealing compound for ZHSCs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507526
- Volume :
- 12
- Issue :
- 19
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry C
- Publication Type :
- Academic Journal
- Accession number :
- 177294704
- Full Text :
- https://doi.org/10.1039/d4tc00262h