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Nanomaterials 2019, 9(4), 608; https://doi.org/10.3390/nano9040608

Mesopore-Rich Activated Carbons for Electrical Double-Layer Capacitors by Optimal Activation Condition

1
Research Center for Carbon Convergence Materials, Korea Institute of Carbon Convergence Technology, Jeonju 54852, Korea
2
Department of Chemistry, Inha University, Incheon 22212, Korea
3
Department of Nano & Advanced Materials Engineering, Jeonju University, Jeonju 55069, Korea
*
Authors to whom correspondence should be addressed.
Received: 18 March 2019 / Revised: 8 April 2019 / Accepted: 10 April 2019 / Published: 12 April 2019
(This article belongs to the Special Issue Nanocomposites for Environmental and Energy Applications)
PDF [708 KB, uploaded 12 April 2019]

Abstract

In this study, activated polymer-based hard carbon using steam activation (APHS) with mesopore-rich pore structures were prepared for application as electrodes in electrical double-layer capacitors (EDLC). The surface morphologies and structural characteristics of APHS were observed using scanning electron microscopy and X-ray diffraction analysis, respectively. The textural properties were described using Brunauer-Emmett-Teller and Barrett-Joyner-Halenda equations with N2/77 K adsorption isotherms. APHS were prepared under various steam activation conditions to find optimal ones, which were then applied as electrode materials for the EDLC. The observed specific surface areas and total pore volumes of the APHS were in the range 1170–2410 m2/g and 0.48–1.22 cm3/g, respectively. It was observed that pore size distribution mainly depended on the activation time and temperature, and that the volume of pores with size of 1.5–2.5 nm was found to be a key factor determining the electrochemical capacity.
Keywords: hard carbon; steam activation; polymeric precursor; electrical double-layer capacitor hard carbon; steam activation; polymeric precursor; electrical double-layer capacitor
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Lee, H.-M.; An, K.-H.; Park, S.-J.; Kim, B.-J. Mesopore-Rich Activated Carbons for Electrical Double-Layer Capacitors by Optimal Activation Condition. Nanomaterials 2019, 9, 608.

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