Low-cost superior symmetric solid-state supercapacitors based on MWCNTs/MnO 2 nanocomposite thin film

摘要

Highlights?MWCNTs/MnO2nanocomposite on stainless steel mesh electrode was prepared by electrodeposition.?The integrated MWCNTs/MnO2nanocomposite electrode delivers extraordinary electrochemical characteristics.?Symmetric solid-state supercapacitor based on MWCNTs/MnO2nanocomposite electrode was successfully assembled.?The assembled symmetric solid-state supercapacitor exhibits high energy density of 28.33?Wh/kg.AbstractHerein we developed a nanocomposite of MnO2and multiwall carbon nanotubes (MWCNTs) deposited on a stainless-steel mesh substrate using a simple and scalable chemical approach to greatly expand the capacitive performance of MnO2-based electrodes. Electrochemical investigations of the chemically prepared M