Characterization and electrochemical performance of activated carbon spheres prepared from potato starch by CO2 activation
Source abstract
Abstract
Potato starch-based activated carbon spheres (PCS) were prepared by CO2 activation in this paper. The morphology of PCS was examined by scanning electron microscopy. Effects of activation temperature and time on characteristics of PCS were studied by N2 adsorption method, and the effect of pore structure of PCS on its electrochemical performances was studied by galvanostatic charge–discharge and cyclic voltammetry. The results indicate that PCS is hollow and retain the morphology of potato starch granule. Activation time has a more important effect on the formation and widening of micropores, the ratios of mesopore reaches 41% when activation time is prolonged to 120 min at 900 °C. Electrochemical test indicates good wetting property and conductivity of electrode material are beneficial to high specific capacitance, and mesopores play an important role in the fast transfer of electrolyte ions.
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Research context
OpenAlex topics: Supercapacitor Materials and Fabrication · Conducting polymers and applications · Electrochemical sensors and biosensors
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