Lignin-based Biochar/graphene Oxide Composites as Supercapacitor Electrode Materials

International Conference on Computer Information and Automation Engineering

计算机科学;运输工程

Cai, Z.^1 ; Jiang, C.^1 ; Xiao, X.F.^1 ; Zhang, Y.S.^1 ; Liang, L.^1

School of Materials Science and Engineering, Wuhan Institute of Technology, China^1

关键词: Electrochemical test;    Fourier transform infrared spectrum;    Graphitic structures;    Oxygen containing groups;    Positive impacts;    Rapid co-precipitation;    Specific capacitance;    Supercapacitor electrodes;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/359/1/012046/pdf
DOI  :  10.1088/1757-899X/359/1/012046

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The lignin-based biochar/graphene composites were effectively obtained via an easy and rapid co-precipitation method. The chemical structure, microstructure, electrochemical properties of lignin/graphene oxide composites before and after carbonization were investigated by Fourier transformation infrared spectrum (FTIR), Scanning electron microscope (SEM), x-ray diffraction (XRD) and cyclic voltammetry (CV). FTIR results confirmed that the oxygen-containing groups of lignin, GO and their composites were partly removed after 800 °C carbonization and GO had a positive impact on the formation of graphitic structure for lignin. XRD results showed that lignin could completely block the restacking of GO sheets. The electrochemical test presented that lignin/graphene oxide composites exhibited a typical CV curve and the specific capacitance reached ∼103F/g at a scan rate of 20mv/s.