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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/33329

Title: Polyoxometalate/Carbon Electrodes for Electrochemical Capacitors
Authors: Bajwa, Gurvinder
Advisor: Lian, Keryn
Department: Materials Science and Engineering
Keywords: Electrochemical Capacitor
Polyoxometalate
Electrodes
Pseudocapacitance
Issue Date: 20-Nov-2012
Abstract: Carbon materials are commonly studied as the electrode material for electrochemical double layer capacitance (EDLC) due to their high surface area. The present work aimed to leverage both EDLC and pseudocapacitance through chemical modification of multi-wall carbon nanotubes (MWCNTs) and onion-like carbon (OLC) with polyoxometalates (POMs) to further enhance the performance of these electrodes. Layer-by-layer (LbL) deposition of two commercially available POMs (PMo12O403- and SiMo12O404-) and three synthesized POMs (PMo11VO404-, PMo10V2O405- and PMo9V3O406-) has been investigated. A single-layer of POMs increased the area specific capacitance by approximately three-times, while superimposing of these POMs into two-layer coatings increased the capacitance by approximately five-times. The morphology and composition of these composite materials were investigated using Scanning Electron Microscopy (SEM) and X-ray Photoelectron Spectroscopy (XPS).
URI: http://hdl.handle.net/1807/33329
Appears in Collections:Master

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