TY - JOUR
T1 - 3D Graphene Fibers Grown by Thermal Chemical Vapor Deposition
AU - Zeng, Jie
AU - Ji, Xixi
AU - Ma, Yihui
AU - Zhang, Zhongxing
AU - Wang, Shuguang
AU - Ren, Zhonghua
AU - Zhi, Chunyi
AU - Yu, Jie
PY - 2018/3/22
Y1 - 2018/3/22
N2 - 3D assembly of graphene sheets (GSs) is important for preserving the merits of the single-atomic-layered structure. Simultaneously, vertical growth of GSs has long been a challenge for thermal chemical vapor deposition (CVD). Here, vertical growth of the GSs is achieved in a thermal CVD reactor and a novel 3D graphene structure, 3D graphene fibers (3DGFs), is developed. The 3DGFs are prepared by carbonizing electrospun polyacrylonitrile fibers in NH3 and subsequently in situ growing the radially oriented GSs using thermal CVD. The GSs on the 3DGFs are densely arranged and interconnected with the edges fully exposed on the surface, resulting in high performances in multiple aspects such as electrical conductivity (3.4 × 104–1.2 × 105 S m−1), electromagnetic shielding (60 932 dB cm2 g−1), and superhydrophobicity and superoleophilicity, which are far superior to the existing 3D graphene materials. With the extraordinary properties along with the easy scalability of the simple thermal CVD, the novel 3DGFs are highly promising for many applications such as high-strength and conducting composites, flexible conductors, electromagnetic shielding, energy storage, catalysis, and separation and purification. Furthermore, this strategy can be widely used to grow the vertical GSs on many other substrates by thermal CVD.
AB - 3D assembly of graphene sheets (GSs) is important for preserving the merits of the single-atomic-layered structure. Simultaneously, vertical growth of GSs has long been a challenge for thermal chemical vapor deposition (CVD). Here, vertical growth of the GSs is achieved in a thermal CVD reactor and a novel 3D graphene structure, 3D graphene fibers (3DGFs), is developed. The 3DGFs are prepared by carbonizing electrospun polyacrylonitrile fibers in NH3 and subsequently in situ growing the radially oriented GSs using thermal CVD. The GSs on the 3DGFs are densely arranged and interconnected with the edges fully exposed on the surface, resulting in high performances in multiple aspects such as electrical conductivity (3.4 × 104–1.2 × 105 S m−1), electromagnetic shielding (60 932 dB cm2 g−1), and superhydrophobicity and superoleophilicity, which are far superior to the existing 3D graphene materials. With the extraordinary properties along with the easy scalability of the simple thermal CVD, the novel 3DGFs are highly promising for many applications such as high-strength and conducting composites, flexible conductors, electromagnetic shielding, energy storage, catalysis, and separation and purification. Furthermore, this strategy can be widely used to grow the vertical GSs on many other substrates by thermal CVD.
KW - 3D graphene fibers
KW - electrical conductivity
KW - electromagnetic shielding
KW - thermal chemical vapor deposition
KW - vertical growth
UR - http://www.scopus.com/inward/record.url?scp=85041530907&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85041530907&origin=recordpage
U2 - 10.1002/adma.201705380
DO - 10.1002/adma.201705380
M3 - RGC 21 - Publication in refereed journal
SN - 0935-9648
VL - 30
JO - Advanced Materials
JF - Advanced Materials
IS - 12
M1 - 1705380
ER -