Morphology Effects on the Supercapacitive Electrochemical Performances of Iron Oxide/Reduced Graphene Oxide Nanocomposites. Issue 4 (27th January 2014)

• Record Type: Journal Article
• Authors: Gao, Peng‐Cheng; Russo, Patrícia A.; Conte, Donato E.; Baek, Seunghwan; Moser, François; Pinna, Nicola; Brousse, Thierry; Favier, Frédéric
• Is Part Of: ChemElectroChem. Volume 1:Issue 4(2014)
• Page Start: 747
• Page End: 754
• Publication Date: 2014-01-27
• Subjects: Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.201300087
• Languages: English
• ISSNs: 2196-0216

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The benzyl alcohol route is used to decorate reduced graphene oxide (RGO) nanosheets with iron oxide (FeOx) nanoparticles. The resulting FeOx/RGO composites combine both electrical double‐layer capacitive and pseudocapacitive behaviors of RGO and FeOx, respectively, owing to the hybrid nanostructure. In 1 <sc>M</sc> Na₂SO₄ aqueous electrolyte, the capacitance of the FeOx/RGO electrode reaches 126 F g⁻¹ in a negative potential range from −0.8 to 0.0 V (vs. Ag/AgCl) and 97 F g⁻¹ in the extended potential window from −0.8 to +0.7 V (vs. Ag/AgCl). By using the benzyl alcohol route, a higher concentration of iron precursor leads to full surface coverage of the RGO nanosheets by smaller FeOx nanoparticles, forming a close‐packed layer that limits the restacking of RGO nonosheets in the dry state. The resulting FeOx/RGO composite gains the same power capability as RGO and a higher energy density than raw FeOx, owing to this well‐designed morphology, .</p> </abstract>