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Jin, Sunghwan
다차원 탄소재료 연구단
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Ultrahigh Strength and Modulus Graphene-Based Hybrid Carbons with AB-Stacked and Turbostratic Structures

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Title
Ultrahigh Strength and Modulus Graphene-Based Hybrid Carbons with AB-Stacked and Turbostratic Structures
Author(s)
Sunghwan Jin; Bongjin Chung; Hyo Ju Park; Benjamin V. Cunning; Jae-Hyeok Lee; Aram Yoon; Ming Huang; Hojin Seo; Dongju Lee; Zonghoon Lee; Rodney S. Ruoff; Seongwoo Ryu
Publication Date
2020-12
Journal
Advanced Functional Materials, v.30, no.50, pp.1 - 11
Publisher
John Wiley & Sons Ltd.
Abstract
Graphene-based hybrid carbons composed of a mix of AB-stacked and turbostratic regions are reported. Macroscopic graphene films consisting of stacked graphenes are prepared using a liquid crystal graphene oxide dispersion. The graphene films are then infiltrated with bioinspired adhesives, catecholamines, and polymerized to obtain graphene/poly(catecholamine) composites. After heat treatment up to 3000 oC, the composite films are transformed to have both AB-stacked (mainly from graphene oxide) and turbostratic (mainly from poly(catecholamines)) structures, and exhibit significantly improved mechanical properties compared to the films having a predominant AB-stacked structure made from only graphene oxide. They have almost twice the fracture strength (1012 +/- 146 MPa) and approximate to 1.5x increase of both Young's modulus (21.87 +/- 2.24 GPa) and strain-to-failure (8.91 +/- 0.50%). In addition, the films have an in-plane electrical conductivity as high as 1320 +/- 159 S cm(-1). Such hybrid-carbon films with the indicated mechanical and electrical properties have many promising uses, such as for light-weight structural materials, and in flexible electronics such as for wearable heaters or in sensing electrodes
URI
https://pr.ibs.re.kr/handle/8788114/9025
DOI
10.1002/adfm.202005381
ISSN
1616-301X
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > 1. Journal Papers (저널논문)
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