High surface area carbon materials derived from corn stalk core as electrode for supercapacitor

• Published in: Diamond and related materials Vol. 88; pp. 18 - 22
• Main Authors: Yu, Kaifeng, Zhu, He, Qi, Hui, Liang, Ce
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.09.2018; Elsevier BV
• Subjects: Activated carbon; Anodes; Batteries; Carbonization; Corn; Corn stalk core; Electrochemical impedance spectroscopy; Electrochemistry; Electrode materials; Electrodes; Raw materials; Supercapacitor; Supercapacitors; Surface area; Electrochemistry; Supercapacitor; Activated carbon; Corn stalk core
• ISSN: 0925-9635; 1879-0062
• DOI: 10.1016/j.diamond.2018.06.018

The activated carbon materials from the corn stalk core raw materials were prepared through the carbonization and activation process and applied as electrode in supercapacitor. The biomass carbon materials activated under different temperatures were tested by cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge-discharge cycling method. The corn stalk core-derived material activated at 700 °C with the highest specific surface area (2349.89 m2 g−1) has exhibited the maximum specific capacitance of 140 F g−1. Further detailed characterization and theoretical analysis have demonstrated that the corn stalk core derived activated carbon anode material can not only enhance the capacity of supercapacitor but also realize the comprehensive utilization of corn stalks. Corn stalk core-derived activated carbonaceous anode material was synthesized by a facile method. Its unique porous structure plays an important role in the improvement of electrochemical performance. [Display omitted] •We report a high surface carbon anode material derived from corn stalk core via a facile method.•The environment-friendly method has potential application in biomass waste treatment.•The biomass electrode delivers an excellent cycleability with high capacity and superior rate capability.