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|Title:||A comparative study of electrocapacitive properties of manganese dioxide clusters dispersed on different carbons|
|Citation:||Zhang, J., Zhao, X.S. (2013-02). A comparative study of electrocapacitive properties of manganese dioxide clusters dispersed on different carbons. Carbon 52 : 1-9. ScholarBank@NUS Repository. https://doi.org/10.1016/j.carbon.2012.08.063|
|Abstract:||Manganese dioxide (MnO2) clusters were directly grown on different carbons, including reduced graphene oxide (RGO), multi-wall carbon nanotubes (CNTs), and carbon black (Vulcan XC-72), via a chelation-mediated aqueous solution method. The electrocapacitive properties of the composite materials were evaluated by using cycle voltammetry, electrochemical impedance spectroscopy (EIS), and charge/discharge techniques. The composite electrode consisting of RGO and MnO2 performed the best among the composite electrodes studied with a specific capacitance as high as 260 F/g at a current density of 0.3 A/g. EIS data revealed the smallest charge transfer resistance in electrode. The results suggest that two-dimensional (2D) RGO sheets are an excellent support for pseudocapacitive MnO2. This study provides fundamental insights into the role of a carbon support in carbon-transition- metal-oxide composite electrodes for supercapacitors. © 2012 Elsevier Ltd. All rights reserved.|
|Appears in Collections:||Staff Publications|
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