Biowaste-originated heteroatom-doped porous carbonaceous material for electrochemical energy storage application

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) Vol. 98; pp. 308 - 317
• Main Authors: Raji, Atchudan, Thomas Nesakumar, Jebakumar Immanuel Edison, Mani, Shanmugam, Perumal, Suguna, Rajangam, Vinodh, Thirunavukkarasu, Somanathan, Lee, Yong Rok
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.06.2021; 한국공업화학회
• Subjects: Biowaste; Carbonaceous materials; Carbonization; Clean energy; Heteroatom-doped carbon; Supercapacitor; 화학공학; Carbonization; Supercapacitor; Biowaste; Carbonaceous materials; Heteroatom-doped carbon; Clean energy
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2021.03.037

[Display omitted] •A novel BH-PCM was prepared from biowaste by a simple carbonization method.•As-synthesized BH-PCM exhibit Cs of 137Fg−1 at 0.5Ag−1 in 1M H2SO4 solution.•This work demonstrates a discarded rubbish into electrode material for supercapacitors.•Besides, the useful hints for the disposal of biowaste and contribute to environmental cleaning. Here, a unique heteroatom-doped spongy carbonaceous material from dwarf banana peel has been synthesized successfully using the one-step hydrothermal method. The discarded banana peel was reused as a carbon source for the formation of heteroatom-doped porous carbon. This biowaste-derived heteroatom-doped porous carbonaceous material (BH-PCM) has plenty of interconnected pores with an acceptable surface area of 213m2g−1. Thoroughly characterized BH-PCM has been used as electrode material for supercapacitor using a three-electrode system with an aqueous 1M H2SO4 solution. The as-synthesized BH-PCM holds an excellent specific capacitance of 137Fg−1 at 0.5Ag−1 and an impressive rate performance with a capacitance enduring 51Fg−1 at 5.0Ag−1. After 10,000 galvanostatic charge–discharge cycles, an initial capacitance of 94% was maintained. To show the practical applicability of the BH-PCM, the symmetrical two-electrode cell was fabricated and delivered the gravimetric specific capacitances of 87Fg−1 at 1Ag−1. The excellent electrochemical performance of BH-PCM towards supercapacitor was due to their high surface area, reasonable heteroatom doping rate, and a suitable degree of graphitization. This study offers a green approach for the development of environmental-friendly potential carbon-based electrode, by converting biowaste to clean/green energy.