E3S Web Conf.
Volume 228, 20212020 International Conference on Climate Change, Green Energy and Environmental Sustainability (CCGEES 2020)
|Number of page(s)||5|
|Section||Research on Green Energy Utilization and Development Technology|
|Published online||13 January 2021|
Construction of S-doped hierarchical porous carbons by acid-free treatment strategy for supercapacitors
School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan, Anhui, China
* Corresponding author: firstname.lastname@example.org
The pollution from acid treatment process in the preparation process of hierarchical porous carbons is a substantial challenge for industrial application of supercapacitors (SCs), which necessitates the development of green alternative technologies. In this work, S-doped hierarchical porous carbons (S-HPCs) are prepared from cheap coal tar pitch by a less harmful in situ KHCO3 activation strategy. The sample obtained at 800°C (S-HPC800) possesses 3D framework structure with hierarchical pores, large specific surface area (1485 m2 g-1) and O, S-containing functional groups. Due to these synergistic characteristics, SHPC800 as supercapacitor electrode exhibits high specific capacitance of 246 F g-1 at 0.1 A g-1 with a capacitance retention of 68.3% at 40 A g-1 and excellent cycle stability with 96.7% capacitance retention after 10, 000 charge-discharge cycles. This work provides an environmentally friendly approach to prepare advanced carbon-based electrode materials from industrial by-products for energy storage devices.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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