Browsing by Author "Kaba, Sinethemba"
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Item Tellurium selenide-gadolinium tungsten oxide quantum dot material for supercapacitor(University of Western Cape, 2022) Kaba, Sinethemba; Iwuoha, EmmanuelRenewable energy has become the main alternative solution to the “energy crisis” the world is faced with. A supercapacitor is one of the energy storage devices capable of storing and releasing energy at a higher rate compared to other traditional devices but in order to capture and release this energy, suitable electrode materials are needed. In this work, hydrothermal synthesis, structure and electrochemical characterization of a newly developed tellurium selenide-gadolinium tungsten oxide quantum dot material for supercapacitor is presented. XRD results of the composite material revealed the presence of phases from the starting materials (i.e. Gd2(WO4)3 and Te0.39Se0.61). Reflection peaks of the parent material Gd2(WO4)3 were retained in the composite material with new additional peaks characteristic to Te0.39Se0.61. Annealing temperature variation of the composite material gave us a clear indication that at temperatures up to 700 °C the composite becomes amorphous but beyond 800 °C, becomes well crystalline in nature.