Differentiation of the non-faradaic and pseudocapacitive electrochemical response of graphite felt/CuFeS2 composite electrodes
By K.M. Deen and E. Asselin
Published in Electrochimica Acta
NULL
2016
Abstract
Chalcopyrite (CuFeS2) is a widely available copper mineral and like other transition metal sulfides it may be a suitable material for energy storage applications. In this preliminary study, a composite electrode was built from synthetic CuFeS2 sandwiched between graphite. Scanning Electron Microscopy (SEM), powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopic (XPS) analyses revealed that the post-synthesis CuFeS2 consisted of microspheres with sulfide (S2?, S22? and Sn2?) surface species. The nature of the charge distribution within this composite electrode was determined and compared with a graphite felt (CF) electrode in 0.2 M \H2SO4\ solution at 25
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