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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Carbon nitride/polypyrrole composite supercapacitor: Boosting performance and stability

Full text
Author(s):
Goncalves, R. [1] ; Paiva, R. S. [1] ; Lima, T. M. [2, 3] ; Paixao, M. W. [3] ; Pereira, E. C. [1]
Total Authors: 5
Affiliation:
[1] Univ Fed Sao Carlos, Dept Chem, Ctr Dev Funct Mat CDMF, Mailbox 676, BR-13565905 Sao Carlos, SP - Brazil
[2] Fed Fluminense Univ, Inorgan Chem Dept, BR-24020150 Niteroi, RJ - Brazil
[3] Univ Fed Sao Carlos, Dept Chem, Ctr Excellence Res Sustainable Chem CERSusChem, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Electrochimica Acta; v. 368, FEB 1 2021.
Web of Science Citations: 2
Abstract

In this work, one-step electrochemical synthesis of a supercapacitor with high performance and stability based on carbon nitride and polypyrrole is described. The new composite was easily obtained through the electrodeposition of polypyrrole on the surface of carbon nitride using an aqueous suspension. This material was fully characterized using both theoretical studies and experimental techniques. The sample showed a capacitance value of 810 F g(-1) (at 0.2 A g(-1)), retaining 92% of its initial value after 6000 charge-discharge cycles at 6.0 A g(-1) . Furthermore, the composite material has a capacitance value of 610 F g(-1) at 9.0 A g(-1). To explain these results, it was used impedance spectroscopy and DFT calculations. The computational calculations showed the formation of hydrogen bonds between the N-H of the polypyrrole and the pi-system of the carbon nitride which stabilized the structures. Besides, a planarization effect could also be observed over the polypyrrole chains. Both results are supported by the experimental data collected from the impedance experiments. (C) 2020 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 15/17141-1 - Development and Mechanism Studies of New Synthetic Methodologies for the Synthesis of Bioactive Compounds.
Grantee:Ricardo Samuel Schwab
Support Opportunities: Regular Research Grants
FAPESP's process: 14/50249-8 - Green chemistry: sustainable synthetic methods employing benign solvents, safer reagents, and bio-renewable feedstock
Grantee:Arlene Gonçalves Corrêa
Support Opportunities: Research Grants - Research Centers in Engineering Program
FAPESP's process: 17/11986-5 - Generation and storage of New Energy: bringing technological development for the country
Grantee:Ana Flávia Nogueira
Support Opportunities: Research Grants - Research Centers in Engineering Program
FAPESP's process: 17/06536-0 - Green chemistry: sustainable synthetic methods employing catalysis, benign solvents, safer reagents and bio-renewable feedstock
Grantee:Thiago de Melo Lima
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 11/10897-2 - Characterization of the redox and ageing processes in self assembled films of conducting polymers
Grantee:Wania Aparecida Christinelli
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)