V2O5/Carbon Nanotube/Polypyrrole Based Freestanding Negative Electrodes for High-Performance Supercapacitors

In this study, the vanadium pentoxide (V2O5), functionalized carbon nanotubes (f-CNT), and polypyrrole (PPy) based composites films have been prepared through a facile synthesis method their electrochemical performance were evaluated as freestanding negative electrodes of supercapacitor. A hydrous V2O5 gel by treating powder with H2O2 was mixed f-CNT to obtain V2O5/f-CNT composite film. then coated PPy vapor phase polymerization method. The deposited on prevented dissolution thus resulted in an improved capacitance cycle life stability for V2O5/f-CNT/PPy electrode. electrode exhibited high areal value (1266 mF cm−2 at current density 1 mA cm−2) good cycling (83.0% retention after 10,000 charge-discharge cycles). superior can be attributed synergy between conductivity high-energy densities. Thus, effectively mitigate drawbacks low specific CNTs poor V2O5.