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Kim, Kyoungsoo
나노물질 및 화학반응 연구단
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Zeolite-templated nanoporous carbon for high-performance supercapacitors

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Title
Zeolite-templated nanoporous carbon for high-performance supercapacitors
Author(s)
Hao Lu; Kyoungsoo Kim; Yonghyun Kwon; Xiaoming Sun; Ryong Ryoo; X. S. Zhao
Publication Date
2018-04
Journal
JOURNAL OF MATERIALS CHEMISTRY A, v.6, no.22, pp.10388 - 10394
Publisher
ROYAL SOC CHEMISTRY
Abstract
Hierarchical porous carbon prepared with calcium-containing nanocrystalline beta zeolite as the template and ethylene as the carbon source at a relatively low carbonization temperature (600 °C) displayed excellent electrocapacitive properties. The presence of both micro/mesopores and surface oxygen-containing groups on the ordered porous structure, along with a high specific surface area (2280 m2 g-1) and pore volume (1.95 cm3 g-1) coupled with good wettability towards the electrolyte enabled the carbon to perform well as a supercapacitor electrode. This carbon electrode achieved a specific capacitance of 250 F g-1 at a current density of 1 A g-1 with 1 M H2SO4 as the aqueous electrolyte measured in a three-electrode system. A symmetric capacitor fabricated with the carbon as both electrodes exhibited a specific capacitance of 161 F g-1 at a current density of 1 A g-1, and an excellent cycling stability. After being cycled 17000 times and shelved for another two months, the electrode exhibited a specific capacitance of 246 F g-1 at 1 A g-1, 153% of the initial capacitance, and still maintained an excellent cycle stability. Besides, an all-solid-state supercapacitor cell fabricated with this carbon as both electrodes and polyvinyl alcohol/H2SO4 gel as the electrolyte displayed an areal specific capacitance of 413 mF cm-2 at a current density of 0.25 mA cm-2. © 2018 The Royal Society of Chemistry. © The Royal Society of Chemistry 2018
URI
https://pr.ibs.re.kr/handle/8788114/4597
DOI
10.1039/c8ta00850g
ISSN
2050-7488
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > 1. Journal Papers (저널논문)
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J. Mater. Chem. A, 2018, 6, 10388–10394.pdfDownload

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