Mahalingam Shanmugam, Durai Mani, Sengottaiyan Chinnasamy, Ahn Young-Ho
Department of Civil Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea.
Department of Applied Chemistry, Tokyo University of Science, Tokyo 162-8601, Japan.
J Nanosci Nanotechnol. 2021 Jun 1;21(6):3183-3191. doi: 10.1166/jnn.2021.19355.
Here we reports an effective synthetic method for the preparation of N-graphene upon thermal annealing of prepared graphene oxide in the existence of ammonia. N-doped graphene oxide was analysed using different characterization techniques like X-ray diffraction, field emission scanning electron microscopy, high resolution transmission electron microscopy, Fourier transform infrared spectroscopy and Raman spectroscopy. The nitrogen atom showed good binding with the graphene sheets, that are analysed by the X-ray photoelectron spectroscopy. The synthesized N-graphene have shown higher thermal stability compared with GO and graphene. The elcerochemnical performance like Cyclic voltammetry as well chronopotentiometry charge-discharge calculations revealed that the N-doped graphene exhibits remarkable behaviour favors a specific capacitance value about 209 F g at 5 mV s and 270 F g for 1 A g applied current density including outsanding charge-discharge stability about 98% of the initial capacitance subsequent 1000 cycles at 5 A g. The N-content in the graphene material with the optimized reaction parameters potentially improved electrode active material for energy storage applications.
在此,我们报道了一种有效的合成方法,即在氨存在下对制备的氧化石墨烯进行热退火来制备氮掺杂石墨烯(N - 石墨烯)。使用不同的表征技术对氮掺杂氧化石墨烯进行了分析,如X射线衍射、场发射扫描电子显微镜、高分辨率透射电子显微镜、傅里叶变换红外光谱和拉曼光谱。通过X射线光电子能谱分析表明,氮原子与石墨烯片层具有良好的结合。合成的N - 石墨烯与氧化石墨烯和石墨烯相比,表现出更高的热稳定性。电化学性能如循环伏安法以及计时电位法充放电计算表明,氮掺杂石墨烯表现出显著的性能,在5 mV s时比电容值约为209 F/g,在1 A/g的施加电流密度下为270 F/g,包括在5 A/g下1000次循环后约98%的初始电容的出色充放电稳定性。具有优化反应参数的石墨烯材料中的氮含量有望改善用于储能应用的电极活性材料。