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Activated Carbons from Thermoplastic Precursors and Their Energy Storage Applications

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 Organic Materials & Fiber Engineering, Chonbuk National University, Jeonju 54896, Korea
4
School of Environmental Engineering, University of Seoul, Seoul 02504, Korea
5
Department of Nano & Advanced Materials Engineering, Jeonju University, Jeonju 55069, Korea
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(6), 896; https://doi.org/10.3390/nano9060896
Received: 27 March 2019 / Revised: 24 May 2019 / Accepted: 15 June 2019 / Published: 19 June 2019
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Abstract

In this study, low-density polyethylene (LDPE)-derived activated carbons (PE-AC) were prepared as electrode materials for an electric double-layer capacitor (EDLC) by techniques of cross-linking, carbonization, and subsequent activation under various conditions. The surface morphologies and structural characteristics of the PE-AC were observed by field-emission scanning electron microscope, Cs-corrected field-emission transmission electron microscope, and X-ray diffraction analysis, respectively. The nitrogen adsorption isotherm-desorption characteristics were confirmed by Brunauer–Emmett–Teller, nonlocal density functional theory, and Barrett–Joyner–Halenda equations at 77 K. The results showed that the specific surface area and total pore volume of the activated samples increased with increasing the activation time. The specific surface area, the total pore volume, and mesopore volume of the PE-AC were found to be increased finally to 1600 m2/g, 0.86 cm3/g, and 0.3 cm3/g, respectively. The PE-AC also exhibited a high mesopore volume ratio of 35%. This mesopore-rich characteristic of the activated carbon from the LDPE is considered to be originated from the cross-linking density and crystallinity of precursor polymer. The high specific surface area and mesopore volume of the PE-AC led to their excellent performance as EDLC electrodes, including a specific capacitance of 112 F/g. View Full-Text
Keywords: activated carbon; steam activation; low-density polyethylene; electric double layer capacitor activated carbon; steam activation; low-density polyethylene; electric double layer capacitor
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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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MDPI and ACS Style

Lee, H.-M.; Kim, K.-W.; Park, Y.-K.; An, K.-H.; Park, S.-J.; Kim, B.-J. Activated Carbons from Thermoplastic Precursors and Their Energy Storage Applications. Nanomaterials 2019, 9, 896.

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