Supercapacitors based on two dimensional VO2 nanosheet electrodes in organic gel electrolyte
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10.1016-j.electacta.2016.10.109.pdf
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ArticleKAUST Department
Functional Nanomaterials and Devices Research GroupKAUST Solar Center (KSC)
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Date
2016-10-19Online Publication Date
2016-10-19Print Publication Date
2016-12Permanent link to this record
http://hdl.handle.net/10754/621084
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VO2 is a low band-gap semiconductor with relatively high conductivity among transition metal oxides, which makes it an interesting material for supercapacitor electrode applications. The performance of VO2 as supercapacitor electrode in organic electrolytes has never been reported before. Herein, two-dimensional nanosheets of VO2 are prepared by the simultaneous solution reduction and exfoliation from bulk V2O5 powder by hydrothermal method. A specific capacitance of 405 Fg−1 is achieved for VO2 based supercapacitor in an organic electrolyte, in three electrode configuration. The symmetric capacitor based on VO2 nanosheet electrodes and the liquid organic electrolyte exhibits an energy density of 46 Wh kg−1 at a power density of 1.4 kW kg−1 at a constant current density of 1 Ag−1. Furthermore, flexible solid-state supercapacitors are fabricated using same electrode material and Alumina-silica based gel electrolyte. The solid-state device delivers a specific capacitance of 145 Fg−1 and a device capacitance of 36 Fg−1 at a discharge current density of 1 Ag−1. Series combination of three solid state capacitors is capable of lighting up a red LED for more than 1 minute.Citation
Rakhi RB, Nagaraju DH, Beaujuge P, Alshareef HN (2016) Supercapacitors based on two dimensional VO2 nanosheet electrodes in organic gel electrolyte. Electrochimica Acta. Available: http://dx.doi.org/10.1016/j.electacta.2016.10.109.Sponsors
Research reported in this publication has been supported by King Abdullah University of Science & Technology (KAUST). Authors thank ‘Advanced nanofabricationNanofabrication, Imaging and Characterization Laboratory and “Analytical Chemistry Core Laboratory” at KAUST. R.B.Rakhi acknowledges the support of Ramanujan Fellowship, Department of Science and Technology (DST), Govt.of India and CSIR-NIIST Thiruvananthapuram, India.Publisher
Elsevier BVJournal
Electrochimica ActaAdditional Links
www.sciencedirect.com/science/article/pii/S0013468616322137ae974a485f413a2113503eed53cd6c53
10.1016/j.electacta.2016.10.109
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Except where otherwise noted, this item's license is described as © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license