@Article{AlmeidaSGSFSFGMG:2023:CoSyEf,
               author = "Almeida, Dalva A. L and Silva, Carla O. P. and Graves, David A. 
                         and Sanches, Richelmy M. and Firmino, Rafael C. and Sardinha, 
                         Andr{\'e} Ferreira and Ferreira, Neiden{\^e}i Gomes and 
                         Gon{\c{c}}alves, Maraisa and Migliano, Ant{\^o}nio C. C. and 
                         Gon{\c{c}}alves, Emerson S.",
          affiliation = "{Instituto de Aeron{\'a}utica e Espa{\c{c}}o (IAE)} and 
                         {Instituto Tecnol{\'o}gico da Aeron{\'a}utica (ITA)} and 
                         {Instituto Tecnol{\'o}gico da Aeron{\'a}utica (ITA)} and 
                         {Instituto Tecnol{\'o}gico da Aeron{\'a}utica (ITA)} and 
                         {Instituto de Aeron{\'a}utica e Espa{\c{c}}o (IAE)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Universidade Federal 
                         de S{\~a}o Paulo (UNIFESP)} and {Instituto de Aeron{\'a}utica e 
                         Espa{\c{c}}o (IAE)} and {Instituto de Aeron{\'a}utica e 
                         Espa{\c{c}}o (IAE)}",
                title = "Comparative synergistic effect of hybrid composites based 
                         polyaniline wrapped metallic oxides (Ni, Fe and Mn) and its 
                         capacitive performance as electrodes for supercapacitor",
              journal = "Electrochimica Acta",
                 year = "2023",
               volume = "472",
                pages = "e143369",
                month = "Dec.",
             keywords = "Composites, Conductive polymers, Hybrid electrodes, 
                         Supercapacitors, Transition metal oxides.",
             abstract = "Regarding the demand for new technologies for energy storage 
                         devices, supercapacitors can bridge the gap between conventional 
                         capacitors and batteries in terms of energy and power densities. 
                         It is reported that metal oxides (MOs), such as oxides of iron 
                         (Fe2O3), nickel (NiO), and manganese (MnO2, Mn2O3), among others, 
                         can act as a nucleus to obtain composites, interconnecting the 
                         polymer chains, with dimensions ranging from micrometer to 
                         nanometers, in addition to producing a porous morphology, which 
                         would be able to reach high specific surface areas. In this study, 
                         polyaniline (PANI) and its respective composites with iron oxides 
                         (Fe2O3) (PANI/Fe2O3), oxides nickel (NiO) (PANI/NiO) and manganese 
                         (MnO2, Mn2O3) (PANI/MnxOy) are developed, characterized, and 
                         compared. The field emission gun-scanning electron microscopy 
                         (FEG-SEM) images display that composites present porous morphology 
                         and dimensions ranging from micrometer, which can reach high 
                         specific surface areas. The Raman data exhibits that 
                         characteristic bands of polyaniline present in the composite 
                         materials underwent significant changes, which can be attributed 
                         to interactions of imine groups with metallic oxides. These 
                         interactions can be of the electrostatic, metal-organic, or 
                         hydrogen bonding type and directly influence the charge transfer 
                         and conductivity process, thus contributing to the increase in 
                         electrochemical performance. By electrochemical analyses, the 
                         nanocomposite materials synergism is proved, especially for 
                         PANI/MnxOy. By electrochemical impedance spectroscopy (EIS), 
                         capacitive profiles of synthesized materials are clear with a 
                         phase angle close to 90° in lower frequencies regions associated 
                         with smaller impedance modulus values in the whole analyzed 
                         frequency range. PANI/MnxOy composite also shows the highest 
                         capacitance value evaluated from a galvanostatic charge and 
                         discharge (GCD) of 115.78 F g\−1. This is reinforced by its 
                         higher specific capacitance, energy, and power values of 205.55 F 
                         g\−1, 21.9 W kg\−1, and 1850 Wh kg\−1, 
                         respectively, per CV.",
                  doi = "10.1016/j.electacta.2023.143369",
                  url = "http://dx.doi.org/10.1016/j.electacta.2023.143369",
                 issn = "0013-4686",
             language = "en",
           targetfile = "1-s2.0-S0013468623015414-main.pdf",
        urlaccessdate = "30 abr. 2024"
}