Na2FeP2O7/C sintēze un elektroķīmiskās īpašības
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Latvijas Universitāte
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lav
Abstract
Bakalaura darba ietvaros sintezēts Na2FeP2O7/C, par oglekļa avotu izmantojot glikozi un grafēna oksīdu, sintēzes metodes pielāgojot optimālākās lādiņietilpības iegūšanai. Sintēžu kvalitāte raksturota ar XRD, SEM, TGA, Ramana spektroskopiju un XPS. Materiālu elektroķīmisko īpašību raksturošanai veiktas galvanostatiskās uzlādes-izlādes, ciklovoltamperometrijas un elektroķīmiskās impedances spektroskopijas analīzes. Raksturota elektroķīmisko īpašību maiņa pēc izmantotās elektrovadošās oglekļa piedevas sintēzes laikā. Augstākā izlādes gravimetriskā lādiņietilpība (80 mAh/g), ātrumspēja un ciklējamība iegūta paraugam, kuram sintēzes laikā pievienotas abas oglekļa piedevas.
During the research work NFP/C was synthesized with glucose and graphene oxide as carbon source, the synthesis was adjusted to obtain highest gravimetric charge capacity. The quality of synthesis was determined by XRD, SEM, TGA, Raman spectroscopy and XPS. For the characterization of electrochemical properties galvanostatic charge-discharge, cyclic voltammetry and electrochemical impedance spectroscopy analyses were carried out. Changes of electrochemical properties are analysed based on electroconductive carbon additive used. Highest discharge gravimetric capacity, rate capability and cyclability were obtained, when both glucose and graphene oxide were added during the synthesis.
During the research work NFP/C was synthesized with glucose and graphene oxide as carbon source, the synthesis was adjusted to obtain highest gravimetric charge capacity. The quality of synthesis was determined by XRD, SEM, TGA, Raman spectroscopy and XPS. For the characterization of electrochemical properties galvanostatic charge-discharge, cyclic voltammetry and electrochemical impedance spectroscopy analyses were carried out. Changes of electrochemical properties are analysed based on electroconductive carbon additive used. Highest discharge gravimetric capacity, rate capability and cyclability were obtained, when both glucose and graphene oxide were added during the synthesis.