Electrochemical Properties of Nitrogen-doped Graphite via Pyrolysis of PVP
Vol. 58, No. 6, pp. 313-321,
Dec. 2021
10.12772/TSE.2021.58.313
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Abstract
Despite considerable efforts to develop alternatives to graphite, it remains the
dominant anode material in commercially available energy storage systems, such as
lithium-ion batteries and supercapacitors, owing to its low electrical resistivity, thermal
expansion, and low cost. In this work, nitrogen-doped graphite was prepared via polyvinylpyrrolidone
pyrolysis to enhance the performance of graphite-based electrodes. The asprepared
N-doped graphite was investigated in detail by field-emission scanning electron
microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, cyclic voltammetry,
electrochemical impedance spectroscopy, and galvanostatic charge/discharge. The results
show that N-doped graphite (N content of 2.52 wt%) synthesized at 700 °C exhibits a high
specific capacitance of 32.85 F g-1 at 1 A g-1, which is approximately three times greater
than that of pristine graphite.
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