Scalable fabrication of micron-scale graphene nanomeshes for high-performance supercapacitor applications

Title
Scalable fabrication of micron-scale graphene nanomeshes for high-performance supercapacitor applications
Authors
김현경박성민이석우김명성박병호이수찬최연준전성찬한중탁남경완정경윤Jian WangJigang ZhouXiao-Qing Yang노광철김광범
Keywords
supercapacitors; micron-scale; graphene; nanomesh
Issue Date
2016-04
Publisher
Energy & environmental science
Citation
VOL 9, NO 4, 1270-1281
Abstract
Graphene nanomeshes (GNMs) with nanoscale periodic or quasi-periodic nanoholes have attracted considerable interest because of unique features such as their open energy band gap, enlarged specific surface area, and high optical transmittance. These features are useful for applications in semiconducting devices, photocatalysis, sensors, and energy-related systems. Here, we report on the facile and scalable preparation of multifunctional micron-scale GNMs with high-density of nanoperforations by catalytic carbon gasification. The catalytic carbon gasification process induces selective decomposition on the graphene adjacent to the metal catalyst, thus forming nanoperforations. The pore size, pore density distribution, and neck size of the GNMs can be controlled by adjusting the size and fraction of the metal oxide on graphene. The fabricated GNM electrodes exhibit superior electrochemical properties for supercapacitor (ultracapacitor) applications, including exceptionally high capacitance (253 F g−1 at 1 A g−1) and high rate capability (212 F g−1 at 100 A g−1) with excellent cycle stability (91% of the initial capacitance after 50 000 charge/discharge cycles). Further, the edge-enriched structure of GNMs plays an important role in achieving edge-selected and high-level nitrogen doping.
URI
http://pubs.kist.re.kr/handle/201004/58844
ISSN
17545692
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KIST Publication > Article
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