Capacitance behavior of ordered mesoporous carbon/Fe2O3 composites: Comparison between 1D cylindrical, 2D hexagonal, and 3D bicontinuous mesostructures

Hu, Junkai; Noked, Malachi; Gillette, Eleanor; Gui, Zhe; Lee, Sang Bok

doi:10.1016/j.carbon.2015.06.019

Title: Capacitance behavior of ordered mesoporous carbon/Fe₂O₃ composites: Comparison between 1D cylindrical, 2D hexagonal, and 3D bicontinuous mesostructures

Journal Article · Fri Jun 12 00:00:00 EDT 2015 · Carbon

DOI:https://doi.org/10.1016/j.carbon.2015.06.019· OSTI ID:1386082

Hu, Junkai ^[1]; Noked, Malachi ^[1]; Gillette, Eleanor ^[1]; Gui, Zhe ^[1]; Lee, Sang Bok ^[1]

Univ. of Maryland, College Park, MD (United States)

The combination of high electronic conductivity, enhanced ionic mobility, and high pore volume make ordered mesoporous carbons promising scaffolds for active energy storage materials. However, mesoporous morphology and structural stability needs to be more thoroughly addressed. As such, in this paper, we demonstrate Fe₂O₃ impregnation into 1D cylindrical (FDU-15), 2D hexagonal (CMK-3), and 3D bicontinuous (CMK-8) symmetries of mesoporous carbons. We use these materials for a systematic study of the effect of mesoporous architecture on the structure stability, ion mobility, and performance of mesoporous composite electrodes. By optimization of the porous structure, the oxide impregnation enabled relatively high performance: >650 F g^–1 of Fe₂O₃ and >200 F g^–1 total capacitance. This work highlights the new considerations of structure degradation in different pore symmetries with active material impregnation and its effect on ion mobility and electrochemical performance in porous scaffold electrodes. The results show that the most commonly used 2D CMK-3 is not suitable as a host material due to its poor structure stability and ion mobility, while the 1D FDU-15 and 3D CMK-8 have their own merits related to framework stability and porous structures.

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Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Nanostructures for Electrical Energy Storage (NEES)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0001160

OSTI ID:: 1386082

Alternate ID(s):: OSTI ID: 1246655

Journal Information:: Carbon, Vol. 93, Issue C; Related Information: NEES partners with University of Maryland (lead); University of California, Irvine; University of Florida; Los Alamos National Laboratory; Sandia National Laboratories; Yale University; ISSN 0008-6223

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 34 works

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Title: Capacitance behavior of ordered mesoporous carbon/Fe2O3 composites: Comparison between 1D cylindrical, 2D hexagonal, and 3D bicontinuous mesostructures

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Title: Capacitance behavior of ordered mesoporous carbon/Fe₂O₃ composites: Comparison between 1D cylindrical, 2D hexagonal, and 3D bicontinuous mesostructures