Abstract
Carbon materials enriched with nitrogen and oxygen surface functional groups were obtained by pyrolyzing strained beer yeast at 750 °C under an inert atmosphere. Physical and surface properties of the carbon obtained were characterized by X-ray powder diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, Raman spectrometry, and X-ray photoelectron spectroscopy. Results show that the carbon possesses an amorphous structure, a spherical morphology, and a high density of surface functional groups. Electrochemical properties were evaluated by cyclic voltammetry, a galvanostatic charge–discharge technique, and electrochemical impedance spectroscopy. The carbon has 989.65 mAh·g−1 of initial discharge capacity and a stable cycle performance for a Li–C cell. A specific capacitance of 120 F·g−1 was obtained for a single carbon electrode and good cycle performance was achieved for a symmetrical supercapacitor fabricated using this carbon. These carbons derived from strained beer yeast have promising applications in energy storage and conversion systems.
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This work was supported by Yangtze Normal University Research Start-up Foundation and Science and Technology Research Project of Chongqing Education Board (KJ081304).
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Zhang, GQ., Zhang, ST. Characterization and electrochemical applications of a carbon with high density of surface functional groups produced from beer yeast. J Solid State Electrochem 13, 887–893 (2009). https://doi.org/10.1007/s10008-008-0623-2
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DOI: https://doi.org/10.1007/s10008-008-0623-2