Integrated manufacturing of REciclable multi-material COmposites for the TRANSport sector
High specific surface area TiO2 aerogels incorporated in situ with Co/Mn oxides as stable electrochemical capacitor electrodes
Nanocomposite aerogels comprised of TiO2 and metal (Co and Mn) oxides, were synthesized via an in situ sol?gel method in this study, and their structural, compositional and electrochemical properties were evaluated for possible applications as electrodes in energy storage devices. The inclusion of metallic oxides into TiO2 aerogels hindered the formation of titania crystalline phases, preserved particle sizes close to their original dimensions and yielded higher specific surface areas compared to pure TiO2 aerogels after heat treatment. High specific surface areas in aerogels positively affects the electrochemical properties, allowing a high electrochemical activity of the electrodes, in addition to intensifying the transport of ions and solvents through the mesoporous network of this material. Evaluation of the electrochemical properties of the aerogel?based nanocomposites involved galvanostatic charge?discharge, cyclic voltammetry, and impedance spectroscopy. The nanocomposites exhibited enhanced electrochemical properties and stable performance within the range suitable for supercapacitor applications, as indicated by the Ragone chart. Notably, aerogels with higher incorporation of cobalt and manganese oxides in TiO2 aerogels exhibited significantly elevated specific surface areas, reaching 562 m2/g and 555 m2/g, respectively. These values are notably high for nanocomposites, underscoring the potential of these electroactive materials for electrochemical capacitors.This article is protected by copyright. All rights reserved.
» Author: Joseane C. Bernardes, Tatianne R. Dal Ross, Carlos R. Rambo
» Publication Date: 28/06/2024
This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement Nº 768737
