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Vertical alignments of graphene sheets spatially and densely piled for fast ion diffusion in compact supercapacitors.
ACS Nano. 2014 May 27; 8(5):4580-90.AN

Abstract

Supercapacitors with porous carbon structures have high energy storage capacity. However, the porous nature of the carbon electrode, composed mainly of carbon nanotubes (CNTs) and graphene oxide (GO) derivatives, negatively impacts the volumetric electrochemical characteristics of the supercapacitors because of poor packing density (<0.5 g cm(-3)). Herein, we report a simple method to fabricate highly dense and vertically aligned reduced graphene oxide (VArGO) electrodes involving simple hand-rolling and cutting processes. Because of their vertically aligned and opened-edge graphene structure, VArGO electrodes displayed high packing density and highly efficient volumetric and areal electrochemical characteristics, very fast electrolyte ion diffusion with rectangular CV curves even at a high scan rate (20 V/s), and the highest volumetric capacitance among known rGO electrodes. Surprisingly, even when the film thickness of the VArGO electrode was increased, its volumetric and areal capacitances were maintained.

Authors+Show Affiliations

National Creative Research Initiative, Center for Smart Molecular Memory, Department of Energy Science, Sungkyunkwan University , 2066 Seoburo, Jangan-Gu, Suwon, Gyeonggi-Do 440-746, Republic of Korea.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24680354

Citation

Yoon, Yeoheung, et al. "Vertical Alignments of Graphene Sheets Spatially and Densely Piled for Fast Ion Diffusion in Compact Supercapacitors." ACS Nano, vol. 8, no. 5, 2014, pp. 4580-90.
Yoon Y, Lee K, Kwon S, et al. Vertical alignments of graphene sheets spatially and densely piled for fast ion diffusion in compact supercapacitors. ACS Nano. 2014;8(5):4580-90.
Yoon, Y., Lee, K., Kwon, S., Seo, S., Yoo, H., Kim, S., Shin, Y., Park, Y., Kim, D., Choi, J. Y., & Lee, H. (2014). Vertical alignments of graphene sheets spatially and densely piled for fast ion diffusion in compact supercapacitors. ACS Nano, 8(5), 4580-90. https://doi.org/10.1021/nn500150j
Yoon Y, et al. Vertical Alignments of Graphene Sheets Spatially and Densely Piled for Fast Ion Diffusion in Compact Supercapacitors. ACS Nano. 2014 May 27;8(5):4580-90. PubMed PMID: 24680354.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Vertical alignments of graphene sheets spatially and densely piled for fast ion diffusion in compact supercapacitors. AU - Yoon,Yeoheung, AU - Lee,Keunsik, AU - Kwon,Soongeun, AU - Seo,Sohyeon, AU - Yoo,Heejoun, AU - Kim,Sungjin, AU - Shin,Yonghun, AU - Park,Younghun, AU - Kim,Doyoung, AU - Choi,Jae-Young, AU - Lee,Hyoyoung, Y1 - 2014/04/01/ PY - 2014/4/1/entrez PY - 2014/4/1/pubmed PY - 2014/4/1/medline SP - 4580 EP - 90 JF - ACS nano JO - ACS Nano VL - 8 IS - 5 N2 - Supercapacitors with porous carbon structures have high energy storage capacity. However, the porous nature of the carbon electrode, composed mainly of carbon nanotubes (CNTs) and graphene oxide (GO) derivatives, negatively impacts the volumetric electrochemical characteristics of the supercapacitors because of poor packing density (<0.5 g cm(-3)). Herein, we report a simple method to fabricate highly dense and vertically aligned reduced graphene oxide (VArGO) electrodes involving simple hand-rolling and cutting processes. Because of their vertically aligned and opened-edge graphene structure, VArGO electrodes displayed high packing density and highly efficient volumetric and areal electrochemical characteristics, very fast electrolyte ion diffusion with rectangular CV curves even at a high scan rate (20 V/s), and the highest volumetric capacitance among known rGO electrodes. Surprisingly, even when the film thickness of the VArGO electrode was increased, its volumetric and areal capacitances were maintained. SN - 1936-086X UR - https://www.unboundmedicine.com/medline/citation/24680354/Vertical_alignments_of_graphene_sheets_spatially_and_densely_piled_for_fast_ion_diffusion_in_compact_supercapacitors_ L2 - https://dx.doi.org/10.1021/nn500150j DB - PRIME DP - Unbound Medicine ER -
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