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

Author(s)

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

Affiliation

^[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

• Document type: Journal article
• Source: ACS APPLIED NANO MATERIALS; v. 4, n. 5, p. 5553-5563, MAY 28 2021.
• Web of Science Citations: 0

Abstract

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)

• FAPESP's process: 17/21988-5 - Nanocomposites based on graphene derivatives, two-dimensional metal oxides and conjugated polymers for application in flexible energy storage devices
• Grantee: Sergio Humberto Domingues
• Support Opportunities: Regular Research Grants