One-step electrodeposited 3D-ternary composite of zirconia nanoparticles, rGO and polypyrrole with enhanced supercapacitor performance

Author(s)

Alves, Ana Paula P. ; Koizumi, Ryota ; Samanta, Atanu ; Machado, Leonardo D. ; Singh, Abhisek K. ; Galvao, Douglas S. ; Silva, Glaura G. ; Tiwary, Chandra S. ; Ajayan, Pulickel M.

• Document type: Journal article
• Source: NANO ENERGY; v. 31, p. 225-232, JAN 2017.
• Web of Science Citations: 28

Abstract

Supercapacitor electrodes consisting of conjugated polymers (CP), metal oxides and graphene nanosheets have been explored as a strategy to achieve high specific capacitance, power, energy density, and stability. In this work, we synthesized a 3D structure composed of zirconia oxide nanoparticles (ZrO2), reduced graphene oxide (rGO) and polypyrrole (PPy), using a simple and easily scalable one-step chronopotentiometry method. Detailed characterization revealed that the addition of rGO and ZrO2 modified the morphology of the electrode material. The capacitance of the resulting architecture improved by up to a 100%. The ternary composite featured high stability, with an increase of 5% in capacitance after a thousand cycles. DFT and MD simulations were carried out in order to provide further insight on the role of zirconia. (AU)

• FAPESP's process: 13/08293-7 - CCES - Center for Computational Engineering and Sciences
• Grantee: Munir Salomao Skaf
• Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC