| Texto completo | |
| Autor(es): |
de Aquino, Caroline Brambilla
;
Fonsaca, Jessica Eliza Silva
;
Domingues, Sergio Humberto
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Materials Science; v. 58, n. 15, p. 16-pg., 2023-04-07. |
| Resumo | |
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 mu A 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. [GRAPHICS] . (AU) | |
| Processo FAPESP: | 17/21988-5 - Nanocompósitos baseados em derivados de grafeno, óxidos metálicos bidimensionais e polímeros conjugados para aplicação em dispositivos flexíveis de armazenamento de energia |
| Beneficiário: | Sergio Humberto Domingues |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 20/13288-6 - Materiais bidimensionais e seus derivados para biossensoriamento fotônico de patógenos |
| Beneficiário: | Jéssica Eliza Silva Fonsaca |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |