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Geometry-controllable graphene layers and their application for supercapacitors

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Title
Geometry-controllable graphene layers and their application for supercapacitors
Author(s)
Soojeong Lee; Sang Ha Lee; Tae Hyung Kim; Misuk Cho; Ji Bum Yoo; Tae-il Kim; Youngkwan Lee
Publication Date
2015-04
Journal
ACS APPLIED MATERIALS & INTERFACES, v.7, no.15, pp.8070 - 8075
Publisher
AMER CHEMICAL SOC
Abstract
A facile and ultrafast method for geometry controllable and vertically transformative 3D graphene architectures is demonstrated. The 2D stacked graphene layers produced by exfoliation of graphite were transformed, e.g., from horizontal to vertical, by applying electric charge (-2 V with 1-3 μAh/cm2). The three-dimensionally transformed graphene layers have maximized surface area as well as high specific capacitance, 410 F g-1 in LiClO4/PC electrolyte, which is 4.4 times higher than that of planar (stacked) graphene layers. Furthermore, they can remarkably exhibit 87% of retained capacitance as the scan rate is increased from 100 to 1000 mV s-1, unlike planar graphene, which displays 61% retention under the same conditions. © 2015 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/1679
ISSN
1944-8244
Appears in Collections:
Center for Neuroscience Imaging Research (뇌과학 이미징 연구단) > Journal Papers (저널논문)
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