With the aim of producing simple and effective transparent conducting electrodes, the conducting polymer poly(3-hexylthiophene) (P3HT) incorporated with reduced graphene oxide film (rGO) (called rGO-P3HT) was prepared...With the aim of producing simple and effective transparent conducting electrodes, the conducting polymer poly(3-hexylthiophene) (P3HT) incorporated with reduced graphene oxide film (rGO) (called rGO-P3HT) was prepared by spin-coating method. Structural, electrical and optical characterization showed that rGO-P3HT films 9.0 wt% P3HT exhibited good stability when exposed to the ambient atmosphere. These composite films of 200 nm thickness possess a sheet resistance and transparency of R□~ 17Ω and T ~ 72%, respectively. Owing to containing conducting polymer, rGO-P3HT-coated glass could be efficiently used in photovoltaic applications, in organic solar cells in particular, with the replacement of the indium tin oxide (ITO) and fluorine tin oxide (FTO) electrodes.展开更多
Durable and cost-effective electrode materials are essential for practical application of supercapacitors.Herein,large area NiCo_(2)O_(4)/reduced graphene oxide(NiCo_(2)O_(4)/rGO)composites with hierarchical structure...Durable and cost-effective electrode materials are essential for practical application of supercapacitors.Herein,large area NiCo_(2)O_(4)/reduced graphene oxide(NiCo_(2)O_(4)/rGO)composites with hierarchical structure were fabricated by a facile one-step ultrasonic spray on Ni foam and directly used as the binder-free electrodes for supercapacitors in aqueous KOH electrolyte.Owing to high electrical conductivity of rGO,hierarchical and layered structure of the electrode,as well as tight adhesion of active materials on the current collector,the as-obtained hybrid electrodes show a high specific capacitance of 871 F g^(-1)at current density of 1 A g^(-1),good rate performance and remarkable cycling stability with a capacitance retention of 134%after 30000 cycles.Besides,the assembled NiCo_(2)O_(4)/rGO//AC asymmetric supercapacitor(ASC)displays the maximum energy density of 29.3 Wh kg^(-1)at a power density of 790.8 W kg^(-1).Significantly,an ultralong cycling life of 102%capacitance retention is achieved for the ASC device after 30,000 charge/discharge cycles at 20 A g^(-1).The scalable fabrication route and excellent electrochemical performance of the NiCo_(2)O_(4)/rGO composites open the door for making novel hybrid electrodes of advanced supercapacitors.展开更多
文摘With the aim of producing simple and effective transparent conducting electrodes, the conducting polymer poly(3-hexylthiophene) (P3HT) incorporated with reduced graphene oxide film (rGO) (called rGO-P3HT) was prepared by spin-coating method. Structural, electrical and optical characterization showed that rGO-P3HT films 9.0 wt% P3HT exhibited good stability when exposed to the ambient atmosphere. These composite films of 200 nm thickness possess a sheet resistance and transparency of R□~ 17Ω and T ~ 72%, respectively. Owing to containing conducting polymer, rGO-P3HT-coated glass could be efficiently used in photovoltaic applications, in organic solar cells in particular, with the replacement of the indium tin oxide (ITO) and fluorine tin oxide (FTO) electrodes.
基金financially supported by the Science and Technology Commission of Shanghai Municipality(No.18060502300)the Natural Science Foundation of Shanghai(21ZR1445700)+1 种基金the Innovation Program of Shanghai Municipal Education Commission(No.2019-01-07-00-07-E00015)the Medical Engineering Cross Project of USST(No.10-20-310-402)
文摘Durable and cost-effective electrode materials are essential for practical application of supercapacitors.Herein,large area NiCo_(2)O_(4)/reduced graphene oxide(NiCo_(2)O_(4)/rGO)composites with hierarchical structure were fabricated by a facile one-step ultrasonic spray on Ni foam and directly used as the binder-free electrodes for supercapacitors in aqueous KOH electrolyte.Owing to high electrical conductivity of rGO,hierarchical and layered structure of the electrode,as well as tight adhesion of active materials on the current collector,the as-obtained hybrid electrodes show a high specific capacitance of 871 F g^(-1)at current density of 1 A g^(-1),good rate performance and remarkable cycling stability with a capacitance retention of 134%after 30000 cycles.Besides,the assembled NiCo_(2)O_(4)/rGO//AC asymmetric supercapacitor(ASC)displays the maximum energy density of 29.3 Wh kg^(-1)at a power density of 790.8 W kg^(-1).Significantly,an ultralong cycling life of 102%capacitance retention is achieved for the ASC device after 30,000 charge/discharge cycles at 20 A g^(-1).The scalable fabrication route and excellent electrochemical performance of the NiCo_(2)O_(4)/rGO composites open the door for making novel hybrid electrodes of advanced supercapacitors.
