Electrochemical Properties of Nitrogen-doped Graphite via Pyrolysis of PVP

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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Electrochemical Properties of Nitrogen-doped Graphite via Pyrolysis of PVP

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