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Updated: Jan 30, 2026

Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for CuII Through Microwave Pre-Pyrolysis
Published on: February 12, 2019
Preparation of lignin-based porous carbon with hierarchical oxygen-enriched structure for high-performance
Weimin Chen1, Xin Wang2, Mohammad Feizbakhshan3
1College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China; Department of Civil and Environment Engineering, University of Alberta, Edmonton T6G 2W2, Canada; Jiangsu Engineering Research Center of Fast-growing Trees and Agrifiber Materials, Nanjing 210037, China.
Abstract:
The biomass-based porous carbon produced by the conventional two-step method (carbonization followed by chemical activation) has a high production cost and an undeveloped mesopore/macropore structure. In this study, lignin was successfully converted into porous carbon (LPC) in one step by microwave heating combined with the use of humidified nitrogen. The obtained LPC had abundant micropores (0.70 cm-3·g-1), hierarchical pore distribution (mesopore ratio: 65.8%), and an oxygen-enriched chemical structure (surface oxygen content: 16.5%). These characteristics provided a high energy density (23.0 kW·kg-1 at 10 A·g-1) and excellent rate capability of the prepared supercapacitor in a gel electrolyte (polyvinyl alcohol/LiCl), leading to a high specific capacitance of 173 F·g-1 at 0.5 A·g-1, and 71.1% at 10 A·g-1 remains. The prepared supercapacitor could deliver a high power density of 1.1 kW·kg-1 at the maximum energy density. The obtained results demonstrate the feasibility of the proposed energy-saving cost-effective preparation approach to obtain a high-performance supercapacitor with a low production cost.
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