Self‐Templating Synthesis of 3D Hollow Tubular Porous Carbon Derived from Straw Cellulose Waste with Excellent Performance for Supercapacitors

Wiley - Tập 12 Số 7 - Trang 1390-1400 - 2019
Zhimin Chen1, Xiaofeng Wang2, Beichen Xue2, Qingling Wei1, Lianghai Hu3, Zichen Wang1, Xiaomin Yang1, Jieshan Qiu4
1College of Chemistry, Jilin University, Changchun, 130012, P. R. China
2State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, P.R. China
3School of Life Sciences, Jilin University, Changchun 130012, P. R China
4College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China

Tóm tắt

Abstract

A three‐dimensional hollow tubular porous carbon (SCPC) was prepared from straw cellulose waste through a self‐templating method combined with NaOH activation. Straw cellulose acts both as carbon source and structural template. The obtained SCPC exhibits a 3D hierarchical porous network structure. SCPC has a high specific surface area, a high mesoporosity ratio, and a low resistivity, which make it display excellent electrochemical performance for supercapacitors. SCPC showed a high specific capacitance of 312.57 F g−1 in 6 m KOH at 0.5 A g−1, an excellent rate performance of 281.32 F g−1 even at 15 A g−1, and an outstanding cyclic stability of 92.93 % capacitance retention after 20 000 cycles at 1 A g−1. SCPC‐based supercapacitors can deliver an energy density of 8.67 Wh kg−1 at a power density of 3.50 kW kg−1 in 6 m KOH and an energy density of 28.56 Wh kg−1 at a power density of 14.09 kW kg−1 in 1 m Et4NBF4/PC, which demonstrates the possibility of applying SCPC in supercapacitors. This research not only offers a facile and sustainable method for the preparation of hierarchical porous carbon for electrochemical energy storage devices but also provides a highly efficient method for the utilization of biomass waste.

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Wiley

Tập 12 Số 7

1390-1400

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