石墨烯
材料科学
X射线光电子能谱
石墨
拉曼光谱
扫描电子显微镜
阳极
氧化物
傅里叶变换红外光谱
化学工程
电极
分析化学(期刊)
纳米技术
化学
复合材料
有机化学
冶金
物理
物理化学
工程类
光学
作者
Bogalera Papaiah Shivamurthy,G.P. Nayaka,G. Santhosh
出处
期刊:Energy & Fuels
[American Chemical Society]
日期:2023-01-26
卷期号:37 (4): 3188-3195
标识
DOI:10.1021/acs.energyfuels.2c03888
摘要
At the end of their life, disposal of Li-ion batteries is a severe issue. Therefore, this study aims to recycle graphite from the spent anode material and synthesize reduced graphene oxide (rGO) in an eco-friendly approach. rGO was prepared from graphene oxide (GO), which is obtained from the spent graphite (G) by the modified Hummer’s method. The graphene powder was reduced by ascorbic acid at 60 °C through a chemical reduction process using GO. The structural morphology of G, GO, and rGO was characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, ultraviolet–visible (UV–vis) spectroscopy, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, field-emission scanning electron microscopy (FE-SEM), and high-resolution transmission electron microscopy (HR-TEM). The Brunauer–Emmett–Teller (BET) surface area and porous behavior of rGO are studied and checked for their capacity in supercapacitor applications. The cyclic voltammogram of rGO (between 0.0–1.0 V) showed a pair of redox peaks corresponding to the electrical double-layer capacitance. The galvanostatic charge/discharge studies for rGO showed a discharge capacity of 278.5 F/g after 200 cycles (coated on a glassy carbon electrode) and 207.9 F/g after 2000 cycles (coated on a Toray carbon electrode) at a 1 A/g current density.
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