Green synthesis of ferrocenyl‐modified MnO<sub>2</sub>/carbon‐based nanocomposite as an outstanding supercapacitor electrode material
Reza Teimuri‐Mofrad, Elmira Payami, Ayda Piriniya, Raha Hadi
Abstract
Abstract A nanocomposite of carbonaceous aerogel (CA) supported by modified MnO 2 nanoparticles with ferrocene (Fc) moiety (MnO 2 ‐Fc/CA) was prepared by a simple and environmentally friendly approach in two steps. In the first step, a porous carbon‐based material was synthesized using watermelon as a starting material. Then, 5‐ferrocenylpentanoic acid was covalently grafted onto the α‐MnO 2 surface through hydrothermal route, and finally, MnO 2 ‐Fc/CA was obtained by simply physically mixing MnO 2 ‐Fc and CA in acetone. After thorough characterization of as‐prepared nanomaterial via appropriate analyses, the MnO 2 ‐Fc/CA nanocomposite reveals excellent electrochemical performances ( C s value: 963 F g −1 at 1 A g −1 ) and outstanding cycling stability (~96% after 3000 CV cycles). Moreover, the constructed symmetric cell reveals a high‐energy density of 38.1 Wh kg −1 and a high‐power density of 4556 W kg −1 . The final high‐performance nanocomposite is a very favorable candidate for energy storage applications.