Well-dispersed chromium oxide decorated reduced graphene oxide hybrids and application in energy storage

• Cr powder can reduced graphene oxide (GO) to reduced GO (rGO).
• The one-pot reaction between GO and Cr powder to obtain the well dispersed Cr3+ ions decorated rGO.
• The Cr2O3/rGO hybrids show excellent electrochemical performances than the pure Cr2O3.

This report describes an artful method to prepare Cr2O3/reduced graphene oxide (rGO) using Cr powder and graphene oxide (GO) as follows: the one-pot reaction between GO and Cr powder to obtain the well dispersed Cr3+ ions decorated rGO, followed by adding ammonia water and annealing to easily transform to Cr2O3/rGO hybrids. The introduction of rGO can improve the surface area and conductivity of the Cr2O3/rGO hybrids. Therefore, the Cr2O3/rGO hybrids show excellent electrochemical performances than pure Cr2O3, such as the three times as high specific capacitance of Cr2O3/rGO than pure Cr2O3. In addition, the Cr-based material could be also used as a class of electrode material of supercapacitors.

Figure optionsDownload as PowerPoint slide