The Prevention of Environmental Damage in Durable Unsymmetrical Huge-capacitors Based on MnO2 and Fe2O3 Nanotubes


1 Department of Mechanical Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran

2 Department of Civil Engineering Qazvin Branch, Islamic Azad University, Qazvin, Iran


The prevention of environmental damage in durable unsymmetrical huge-capacitor (UHC) with α-MnO2 nanotubes and amorphous Fe2O3 nanotubes grown on flexible carbon fabric is first designed and fabricated. The assembled novel flexible UHC device with an extended operating voltage window of 1.6 V exhibits excellent performance such as a high energy density of 0.55 mWh/cm3 and good rate capability. The UHC devices can find numerous applications as effective power sources, such as powering color-switchable sun glasses and smart windows.