Flexible carbon nanotubes-MnO2/reduced graphene oxide-polyvinylidene fluoride films for supercapacitor electrodes

作者：Bai Zepeng; Li Hongji; Li Mingji; Li Cuiping; Wang Xufei; Qu Changqing; Yang Baohe

来源：International Journal of Hydrogen Energy, 2015, 40(46): 16306-16315.

DOI：10.1016/j.ijhydene.2015.09.065

• Supercapacitor
• Carbon nanotubes
• MnO2 nanosheets
• Graphene
• Polyvinylidene fluoride

Reduced graphene oxide (rGO) added into polyvinylidene fluoride (PVDF) films have been used as substrates for successive electrodeposition of MnO2 and carbon nanotube (CNT) layers, forming flexible CNTs-MnO2/rGO-PVDF hybrid films that are suitable for use as supercapacitor electrodes. The hybrid films maintained the high conductivity of rGO nanosheets, high surface-to-volume ratio of CNTs, and large pseudo-capacitance of MnO2 nanosheets, and demonstrated their potential in all-solid-flexible supercapacitors by significantly improving the capacitive behavior of the supercapacitor when assembled into supercapacitor devices. Asymmetric supercapacitors comprised of the CNTs-MnO2/graphene-PVDF hybrid film electrode, Pt sheet electrode, and a 6 M NaOH electrolyte exhibited a working voltage as high as 1.8 V and a high energy density of 49.1 W h kg(-1) at a power density of 4.83 kW kg(-1). Moreover, the supercapacitors exhibited a specific capacitance of 276.3 F g(-1) at a discharge current density of 0.08 A g(-1).

• 出版日期2015-12-14
• 单位天津理工大学