胡敏素基活性炭的制备及电化学性能研究

Preparation and electrochemical properties of humins-based activated carbon

以生物质酸水解的固体废弃物胡敏素为原料,KOH为活化剂,经活化和炭化制备得到胡敏素基活性炭材料,并通过XRD、FTIR、N2物理吸脱附、SEM、TGA等表征技术对样品的结构和形貌进行分析;还通过循环伏安法和恒流充放电法分析了样品的电化学性能。结果表明:胡敏素基活性炭材料比表面积大且热稳定性能良好。其中,在900℃下炭化的AC-900样品比表面积最大达1732.57 m_(2)/g,在1100℃下炭化的AC-1100样品在电流密度为1 A/g下比容量高达364 F/g,在电流密度为9A/g下比容量也达175 F/g。本文研究结果表明所制备的胡敏素基活性炭在超级电容器领域具有良好的应用潜力。

Activated carbons were prepared with humins,the solid wastes produced by biomass acid hydrolysis,as raw material and KOH as activator.XRD,FTIR,N2 physical adsorption and desorption,SEM and TGA were used to characterize the structure and morphology of the samples.And the electrochemical performance of the activated carbon as electrode for surpercapacitors was also analyzed by cyclic voltammetry and constant current charge-discharge methods.The results show that the humins-based activated carbons have a large specific surface area and good thermal stability.The specific surface area of the sample carbonized at 900℃ is up to1732.57 m^(2)/g,and the specific capacity of the sample carbonized at 1100℃ is 364 F/g at a current density of 1 A/g,reaching 175 F/g at acurrent density of 9 A/g.It shows that the prepared humin-based activated carbons exhibit good application potential in the field of supercapacitors.