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Open AccessArticle

Nitrogen-Doped Hierarchical Meso/Microporous Carbon from Bamboo Fungus for Symmetric Supercapacitor Applications

by Zhanghua Zou 1,2,†, Yu Lei 2,†, Yingming Li 2, Yanhua Zhang 2 and Wei Xiao 2,*
1
College of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054, China
2
Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Yongchuan, Chongqing 402160, China
*
Author to whom correspondence should be addressed.
Both authors contribute equally to this work.
Academic Editor: Giuseppe Cirillo
Molecules 2019, 24(20), 3677; https://doi.org/10.3390/molecules24203677
Received: 17 September 2019 / Revised: 30 September 2019 / Accepted: 9 October 2019 / Published: 12 October 2019
(This article belongs to the Special Issue Porous Carbon Materials and Their Applications)
We report the synthesis of nitrogen-doped hierarchical meso/microporous carbon using renewable biomass bamboo fungus as precursor via two-step pyrolysis processes. It is found that the developed porous carbon (NHPC-800) features honeycomb-like cellular framework with well-developed porosity, huge specific surface area (1708 m2 g−1), appropriate nitrogen-doping level (3.2 at.%) and high mesopore percentage (25.5%), which are responsible for its remarkable supercapacitive performances. Electrochemical tests suggest that the NHPC-800 electrode offers the largest specific capacitance of 228 F g−1, asplendid rate capability and stable electrochemical behaviors in a traditional three-electrode system. Additionally, asymmetric supercapacitor device is built based on this product as well. An individual as-assembled supercapacitor of NHPC-800//NHPC-800 delivers the maximum energy density of 4.3 Wh kg−1; retains the majority of capacitanceat large current densities; and shows terrific cycling durability with negligible capacitance drop after long-term charge/discharge for beyond 10,000 cycles even at a high current density of 10 A g−1. These excellent supercapacitive properties of NHPC-800 in both three- and two-electrode setups outperform those of lots of biomass-derived porous carbons and thus make it a perspective candidate for producing cost-effective and high-performance supercapacitors View Full-Text
Keywords: bamboo fungus; porous carbon; symmetric supercapacitor; alkaline activation; nitrogen doping bamboo fungus; porous carbon; symmetric supercapacitor; alkaline activation; nitrogen doping
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Zou, Z.; Lei, Y.; Li, Y.; Zhang, Y.; Xiao, W. Nitrogen-Doped Hierarchical Meso/Microporous Carbon from Bamboo Fungus for Symmetric Supercapacitor Applications. Molecules 2019, 24, 3677.

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