Synthesis of Bi 2 O 3 -MnO 2 Nanocomposite Electrode for Wide-Potential Window High Performance Supercapacitor

Saurabh Singh, Rakesh K. Sahoo, Nanasaheb M. Shinde, Je Moon Yun, Rajaram S. Mane and Kwang Ho Kim
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Saurabh Singh: Department of Materials Science and Engineering, Pusan National University, San 30 Jangjeon-dong, Geumjeong-gu, Busan 46241, Korea
Rakesh K. Sahoo: Global Frontier R&D Center for Hybrid Interface Materials, Pusan National University, 30 Jangjeon-dong, Geumjung-gu, Busan 46241, Korea
Nanasaheb M. Shinde: Global Frontier R&D Center for Hybrid Interface Materials, Pusan National University, 30 Jangjeon-dong, Geumjung-gu, Busan 46241, Korea
Je Moon Yun: Global Frontier R&D Center for Hybrid Interface Materials, Pusan National University, 30 Jangjeon-dong, Geumjung-gu, Busan 46241, Korea
Rajaram S. Mane: Global Frontier R&D Center for Hybrid Interface Materials, Pusan National University, 30 Jangjeon-dong, Geumjung-gu, Busan 46241, Korea
Kwang Ho Kim: Department of Materials Science and Engineering, Pusan National University, San 30 Jangjeon-dong, Geumjeong-gu, Busan 46241, Korea

Energies, 2019, vol. 12, issue 17, 1-15

Abstract: In this work, we report the synthesis of a Bi 2 O 3 -MnO 2 nanocomposite as an electrochemical supercapacitor (ES) electrode via a simple, low-cost, eco-friendly, and low-temperature solid-state chemical process followed by air annealing. This as-synthesized nanocomposite was initially examined in terms of its structure, morphology, phase purity, and surface area using different analytical techniques and thereafter subjected to electrochemical measurements. Its electrochemical performance demonstrated excellent supercapacitive properties in a wide potential window. Its specific capacitance was able to reach 161 F g −1 at a current density of 1A g −1 and then showed a superior rate capability up to 10 A g −1 . Furthermore, it demonstrated promising cycling stability at 5 A g −1 with 95% retention even after 10,000 charge–discharge cycles in a wide potential window of 1.3 V, evidencing the synergistic impact of both Bi 2 O 3 and MnO 2 in the Bi 2 O 3 -MnO 2 ES electrode. Additionally, the practical reliability of the envisioned electrode was ascertained by the fabrication of a symmetric Bi 2 O 3 -MnO 2 //Bi 2 O 3 -MnO 2 pencil-type supercapacitor device that displayed an energy density of 18.4 Wh kg −1 at a power density of 600 W kg −1 and a substantial cyclic stability up to 5000 cycles. Subsequently, an LED was also powered at its full brightness using three of these devices connected in series in order to demonstrate the real-time application of the Bi 2 O 3 -MnO 2 ES electrode.

Keywords: nanocomposite; Bi 2 O 3 -MnO 2; solid state synthesis; supercapacitor; wide potential window (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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