Supercapacitors based on free-standing reduced graphene oxides/carbon nanotubes hybrid films

Zhi-Guang Yang, Ning-Ning Liu, Shuo Dong, Feng-Shou Tian, Yong-Ping Gao, Zhi-Qiang Hou
2018 SN Applied Sciences  
The freestanding of reduced graphene oxides/carbon nanotubes (rGO/CNTs) hybrid films are synthesized via the simple vacuum filtration and thermal reduction methods. And the electrochemical behaviors of rGO/CNTs hybrid films are investigated in KOH and in Et 4 NBF 4 /AN electrolyte, respectively. In three-electrode systems, the rGO/CNTs hybrid films show a maximum specific capacitance of 221 F g −1 , a 71% capacitance retention, and an excellent cycle life in 1 M KOH electrolyte. And the
more » ... hemical behaviors of rGO/CNTs films in Et 4 NBF 4 /AN electrolyte under three-electrode systems show a maximum specific capacitance of 174 F g −1 and good rate capability. Moreover, a symmetric supercapacitor of rGO/ CNTs//rGO/CNTs demonstrates a maximum specific capacitance of 24 F g −1 at 1 A g −1 , a energy density of 20.8 Wh kg −1 at 1.27 kW kg −1 , and an excellent cycle life of 86.1% retention after 5000 cycles. It suggests that the symmetric supercapacitor could be regarded as an ideal energy storage system.
doi:10.1007/s42452-018-0059-y fatcat:lswcgw7dcresxovqewuwivse4q