Performance of chemically synthesized Mn <sub>3</sub> O <sub>4</sub> /rGO nanocomposite for electrochemical supercapacitor: a cost-effective high-performance electrode
Qiongyu Li, Youyong Li, Akash V. Fulari, Gajanan Ghodake, Dae‐Young Kim, G. M. Lohar
Abstract
Abstract The manganese oxide graphene oxide (Mn 3 O 4 /rGO) composite heterojunction with copper oxide is useful for the production of an electrochemical supercapacitor. The graphene oxide and manganese oxide composite have been synthesized by adopting a method of co-precipitation. The composite of Mn 3 O 4 /rGO was synthesized with different concentrations of Mn 3 O 4 and rGO. The structural, morphological, electrochemical and supercapacitive properties of Mn 3 O 4 /rGO composite have been examined. The electrochemical and supercapacitive properties have been studied with regard to different substrates. The Mn 3 O 4 /rGO composite was deposited on different substrates such as steel, copper and brass. The CuO/Mn 3 O 4 /rGO shows relatively better specific capacitance (856 F g −1 ) and better stability (82% retention after 2000 cycles) than other substrates used. The present work describes the development of cost-effective and high-performance CuO/Mn 3 O 4 /rGO-based nanomaterials for supercapacitors. The CuO/Mn 3 O 4 /rGO composite can be used as a flexible supercapacitor device.