RuO2–WO3/PAni: combining the best of two classes of materials for a new energy storage device
Tipo
Artigo
Data de publicação
2023
Periódico
Journal of Materials Science
Citações (Scopus)
1
Autores
de Aquino C.B.
Fonsaca J.E.S.
Domingues S.H.
Fonsaca J.E.S.
Domingues S.H.
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Título de Volume
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Resumo
© 2023, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.In this work, we show the preparation of an energy storage device based on the combination of two distinct classes of materials, mixed transition metal oxides (MTMO) and conductive polymers. Thus, we investigated different proportions between Ru and W precursors to obtain RuO2–WO3, MTMO, proper for energy storage applications. After several characterizations, we were able to evidence W insertion on Ru structure for RuO2–WO3 1:5 and correlate it to the best specific capacitance found (661 mF cm−2 at 1.0 mA cm−2). Targeting at improved results, we combined the most promising MTMO settled with another class of pseudocapacitive material, the polyaniline (PAni). RuO2–WO3 1:5/PAni nanocomposite was synthesized and, after being properly characterized, the attested synergistic effects of components led to a material with superlative capacitive properties, whose capacitance values at 50 µA cm−2 reached up to 937 mF cm−2. With the evidence of this representative value, a symmetrical energy storage device was built and values comparable to commercial ones were accomplished (241 mF cm−2). These remarkable results attested that MTMOs wisely architected may offer richer redox reactions and that, through the rational design of nanocomposites, electrochemical capabilities may be impressively broaden, hence comprising a promising cost-effective alternative for energy storage devices. Graphical abstract: [Figure not available: see fulltext.].
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Assuntos Scopus
Conductive Polymer , Different proportions , Energy storage applications , New energies , Polyaniline nanocomposites , Pseudo-capacitive materials , Specific capacitance , Synergistic effect , Synthesised , Transition-metal oxides