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    Houttuynia-derived nitrogen-doped hierarchically porous carbon for high-performance supercapacitor

    Year: 2020

    Journal: Carbon, Volume 161, MAY, page 62–70

    Authors: Shang, Zhen; An, Xingye; Zhang, Hao; Shen, Mengxia; Baker, Fiona; Liu, Yuxin; Liu, Liqin; Yang, Jian; Cao, Haibing; Xu, Qingliang; Liu, Hongbin; Ni, Yonghao

    Organizations: National Key Research and Development Plan [2017YFB0307902]; Natural Science Foundation of TianjinNatural Science Foundation of Tianjin [19JCQNJC05400]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31670589]; Canada Research Chairs program of the Government of CanadaCanada Research Chairs; Basic Scientific Research Operation Fund of Tianjin University of Science and Technology [000040186]; Research Fund of Tianjin Key Laboratory of Pulp Paper [201806]; Zhejiang Jing Xing Paper Joint Stock Co., Ltd.

    Keywords: Houttuynia; Nitrogen-doped; 3D porous nanostructure; Carbon material; Supercapacitor

    Three-dimensional (3D) heteroatom-doped nanostructured carbon materials have gained extensive attention because of their tremendous potential for enhancing supercapacitor performance. Herein, based on a mild carbonization/activation process we successfully developed green/sustainable 3D hierarchically porous nitrogen-doped nanostructure carbon (N-HNC) materials from houttuynia biomass, showing high specific capacitance and high cyclic stability. The as-prepared houttuynia-derived porous carbon material shows a unique flower-like architecture with well-distributed micro/meso pores and a high specific surface area of 2090 m(2)/g. The assembled supercapacitor based on N-HNC sample shows superior specific capacitance (473.5 F/g at 1 A/g) and remains over 50% of specific capacitance at 20 A/g. The N-HNC based symmetric supercapacitor, constructed with a two-electrode configuration, shows an energy density of 15.99 Wh/kg at 500 W/kg and outstanding capacitance retention of 95.74% even after 10,000 charge-discharge cycles at 10 A/g in an aqueous 6 M KOH electrolyte system. The results highlight the potential of the 3D porous N-doped hierarchical nano-structural carbon materials from houttuynia biomass as candidate electrodes for supercapacitor applications. This study provides an example of using the inherent framework structure of biomass as a precursor to synthesize hierarchically porous nitrogen-doped nanostructure for high-performance supercapacitor applications. (C) 2020 Elsevier Ltd. All rights reserved.
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