Controllable growth of CNTs on graphene as high-performance electrode material for supercapacitors.
Design and synthesis of three-dimensional (3D) structured carbon materials are crucial for achieving high-performance supercapacitors (SC) for energy storage. Here, we report the preparation of 3D architectured GN-CNT hybrid as SC electrodes. Controllable growth of carbon nanotubes on graphene sheets was realized through a facile one-pot pyrolysis strategy. The length of the carbon nanotubes could be rationally tuned by adjusting the amount of precursors. Correspondingly, the resulted GN-CNT hybrid showed adjustable electrochemical performance as an SC electrode. Importantly, the GN-CNT exhibited a high specific surface area of 903 m(2) g(-1) and maximum specific capacitance of 413 F g(-1) as SC electrodes at a scan rate of 5 mV s(-1) in 6 M KOH aqueous solution. This work paves a feasible pathway to prepare carbon electrode materials with favorable 3D architecture and high performance, for use in energy storage and conversion.
Beijing Key Laboratory for Chemical Power Source and Green Catalysis, School of Chemical Engineering and Environment, Beijing Institute of Technology , Beijing, 100081, People's Republic of China.
Zhi-Yu
ZY
Yang
Yu-Fei
YF
Zhao
Qing-Qing
QQ
Xiao
Yu-Xia
YX
Zhang
Lin
L
Jing
Yi-Ming
YM
Yan
Ke-Ning
KN
Sun