Ternary Nanocomposites of Reduced Graphene Oxide, Polyaniline, and Iron Oxide Applied for Energy Storage

Autor(es)

Martins, Vitor H. N. ^[1] ; Siqueira, Nicolas M. S. ^[1] ; Fonsaca, Jessica E. S. ^[2] ; Domingues, Sergio H. ^[2] ; Souza, Victor H. R. ^[1]

Afiliação do(s) autor(es)

^[1] Fundacao Univ Fed Grande Dourados, Fac Exact Sci & Technol, BR-79804970 Dourados, MS - Brazil

^[2] Univ Prebiteriana Mackenzie, MackGraphe Graphene & Nanomat Res Ctr, BR-01302907 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ACS APPLIED NANO MATERIALS; v. 4, n. 5, p. 5553-5563, MAY 28 2021.
• Citações Web of Science: 0

Resumo

This work states the preparation of ternary composites of reduced graphene oxide/polyaniline/iron oxide as free-standing and flexible thin films using a simple doctor blade technique. We optimized the properties of the films for further studies as an electrode in a symmetric all-solid supercapacitor. Adding polyaniline into the composites is imperative to produce free-standing films with no binder and conductive additive, besides improving the energy storage performance along with iron oxide. The ternary free-standing film exhibited a specific capacitance of 281 F g(-1) in the three-electrode system and a specific capacitance of 24 F g(-1) in the all-solid supercapacitor, including a good long-term stability of 76% and excellent Coulombic efficiency ranging from 92 to 166% after 3000 cycles at 3 A g(-1). The performance of these free-standing ternary composites prepared using the same method applied in commercial supercapacitors may offer a perspective to its large-scale application in energy storage systems. (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