All-in-one supercapacitor devices based on nanosized Mn4+-doped WO3

Ammar, Ameen Uddin and Stan, Manuela and Popa, Adriana and Toloman, Dana and Macavei, Sergiu and Leostean, Cristian and Ciorita, Alexandra and Erdem, Emre and Rostas, Arpad Mihai (2023) All-in-one supercapacitor devices based on nanosized Mn4+-doped WO3. Journal of Energy Storage, 72 . ISSN 2352-152X

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In this study, nanosized Mn-doped WO3-based materials were used as electrode materials for high-performance supercapacitor devices. Various Mn concentrations (0.5, 1, and 1.5%) were used to change the defect structure of WO3, which improved the material's electrical properties. A thorough morpho-structural and defect structure analysis of the undoped and doped WO3 was performed through various characterization techniques, among which EPR and PL spectroscopy gave insight into the effect that Mn-doping caused on the defect structure and optical properties of WO3. The presence of Mn4+ ions and a high concentration of oxygen vacancies was observed, strongly influencing the electrode material when used in symmetric supercapacitors, where the electrochemical performance was tested. The symmetric supercapacitors were designed without booster materials (like carbon black) and showed increased specific capacitance (115 F/g) and energy density (16 Wh/Kg) values.
Item Type: Article
Uncontrolled Keywords: EPR spectroscopy; Mn4+-ions; Symmetric supercapacitors; WO3:Mn
Divisions: Faculty of Engineering and Natural Sciences
Depositing User: Emre Erdem
Date Deposited: 24 Aug 2023 15:34
Last Modified: 24 Aug 2023 15:34

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