A novel pseudocapacitance mechanism of elm seed-like mesoporous MoO3−x nanosheets as electrodes for supercapacitors. Issue 38 (16th September 2016)

• Record Type: Journal Article
• Authors: Lu, Qian-Long; Zhao, Shi-Xi; Chen, Chang-Ke; Wang, Xia; Deng, Yu-Feng; Nan, Ce-Wen
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 38(2016)
• Page Start: 14560
• Page End: 14566
• Publication Date: 2016-09-16
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6ta06326h
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Elm seed-like mesoporous MoO3− x nanosheets were synthesised, and possess both redox and intercalation faradic pseudocapacitance mechanisms. Abstract : Pseudocapacitance is induced by surface or near surface redox, ion intercalation or underpotential deposition processes. A given electrochemically active material usually has only one of the above mechanisms. In this study, we synthesized elm seed-like mesoporous MoO3− x nanosheets, which possess both redox and intercalation faradic mechanisms. This novel pseudocapacitance mechanism causes a high capacitance of 1480 F g −1 at 5 A g −1 and outstanding cycling performance where the capacitance does not decay but increases slightly up to 10 000 cycles at a scan rate of 100 mV s −1 . Here, we clarified that the tunnel structure of MoO3− x and its special electrochemical kinetics towards H + generate this mechanism. This faradic mechanism could achieve a higher degree of utilization of the active-sites thus resulting in excellent electrochemical performance.