Fabrication of thickness controllable free-standing sandwich-structured hybrid carbon film for high-rate and high-power supercapacitor.
Hybrid carbon films composed of graphene film and porous carbon film may give full play to the advantages of both carbon materials, and have great potential for application in energy storage and conversion devices. Unfortunately, there are very few reports on fabrication of hybrid carbon films. Here we demonstrate a simple approach to fabricate free-standing sandwich-structured hybrid carbon film composed of porous amorphous carbon film and multilayer graphene film by chemical vapor deposition in a controllable and scalable way. Hybrid carbon films reveal good electrical conductivity, excellent flexibility, and good compatibility with substrate. Supercapacitors assembled by hybrid carbon films exhibit ultrahigh rate capability, wide frequency range, good capacitance performance, and high-power density. Moreover, this approach may provide a general path for fabrication of hybrid carbon materials with different structures by using different metals with high carbon solubility, and greatly expands the application scope of carbon materials.
School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei. 430074, PR China.
Helin
H
Wei
State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083, PR China.
Sihang
S
Wei
School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei. 430074, PR China.
Weifeng
W
Tian
School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei. 430074, PR China.
Daming
D
Zhu
School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei. 430074, PR China.
Yuhao
Y
Liu
School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei. 430074, PR China.
Lili
L
Yuan
School of Physics, Huazhong University of Science and Technology, Wuhan, Hubei. 430074, PR China.
Xin
X
Li