Novel synthesis route for preparation of porous nitrogen-doped carbons from lignocellulosic wastes for high performance supercapacitors

Pourjavadi, A ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jallcom.2020.154116
  3. Publisher: Elsevier Ltd , 2020
  4. Abstract:
  5. Porous nitrogen-doped carbons derived from biomass wastes are considered as promising materials for energy storage devices. Herein, a novel and scalable synthesis route for preparation of these materials from sugarcane bagasse waste is demonstrated. The synthesis process includes a hydrogel intermediate in which delignified bagasse and polyacrylamide networks are interlaced in molecular scale and calcium acetate serves as a hard template within the polymeric chains. After pre-carbonization and chemical activation of the hydrogel, porous nitrogen-doped carbon with high surface area of 1834.3 m2 g−1 and considerable pore volume of 1.03 cm3 g−1 was obtained with nitrogen and oxygen contents of 3.6% and 14.5%, respectively. The fabricated supercapacitor electrode demonstrated high specific capacitance of 241 F g−1 at 0.5 A g−1 current density with capacitance retention of 96.5% after 5000 charge-discharge cycles at 2 A g−1. In a symmetrical two-electrode cell, the porous nitrogen-doped carbon demonstrated high energy density of 14.8 W h kg−1 at power density of 1001.6 W kg−1, which is comparable to many nitrogen-doped carbon materials found in the literature. © 2020
  6. Keywords:
  7. Bagasse ; Hydrogel ; Nitrogen-doped carbon ; Supercapacitor
  8. Source: Journal of Alloys and Compounds ; Volume 827 , 2020
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0925838820304795