Thalji, Mohammad R. and Ali, Gomaa A. M. and Algarni, H. and Chong, Kwok Feng (2019) Al3+ ion intercalation pseudocapacitance study of W18O49 nanostructure. Journal of Power Sources, 438. pp. 1-8. ISSN 0378-7753. (Published)
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Abstract
Intercalation pseudocapacitance is of essential significance for designing high performance electrode materials, which offers exceptional charge storage characteristics. In this study, we elucidate the pseudocapacitive behavior of Al3+ ions intercalation within the distinctive tunnels of monoclinic W18O49 nanostructure. 3D sea urchin-like W18O49 is synthesized through one-step solvothermal approach. Its physicochemical properties are investigated by X-ray diffraction, X-ray photoelectron spectroscopy, Field emission scanning electron microscopy and Brunauer-Emmett-Teller surface area analysis. Cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy techniques are used to investigate the electrochemical characteristics of W18O49 electrode in different electrolyte systems. It shows high specific capacitance of 350 F g−1 at 1 A g−1, superior electrochemical long-term stability in the Al3+ electrolyte with 92% capacitance retention at 8000 cycles. The excellent electrochemical performance is predominantly due to the Al3+ ions intercalation/de-intercalation with W18O49 nanostructure that is proven by ex situ X-ray diffraction analysis. The work marks a notable achievement in the effort of substituting commonly acidic proton electrolyte for W18O49 supercapacitor.
| Item Type: | Article |
|---|---|
| Additional Information: | Indexed by SCOPUS |
| Uncontrolled Keywords: | Intercalation pseudocapacitance; W18O49; Supercapacitors; Charge storage; Al3+ electrolyte |
| Subjects: | Q Science > Q Science (General) |
| Faculty/Division: | Faculty of Industrial Sciences And Technology |
| Depositing User: | Noorul Farina Arifin |
| Date Deposited: | 27 Sep 2019 03:37 |
| Last Modified: | 02 Oct 2019 07:34 |
| URI: | http://umpir.ump.edu.my/id/eprint/25908 |
| Download Statistic: | View Download Statistics |
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