Influence of the polymeric coating thickness on the electrochemical performance of Carbon Fiber/PAni composites

Autor(es)

Fonseca, Carla Polo ; de Lima Almeida, Dalva Alves ; Duarte de Oliveira, Mayara Camila ; Baldan, Mauricio Ribeiro ; Ferreira, Neidenei Gomes

• Tipo de documento: Artigo Científico
• Fonte: POLIMEROS-CIENCIA E TECNOLOGIA; v. 25, n. 5, p. 8-pg., 2015-09-01.

Resumo

Carbon fiber/polyaniline composites (CF/PAni) were synthesized at three different deposition time of 30, 60 and 90 min by oxidative polymerization. The composite materials were morphologically and physically characterized by scanning electron microscopy and by Raman spectroscopy, respectively. Their electrochemical responses were analyzed by cyclic voltammetry, by galvanostatic test, and by electrochemical impedance spectroscopy. The influence of the PAni layer thickness deposited on carbon fibers for the composite formation as well as for their electrochemical properties was discussed. The CF/PAni-30 showed a nanometric thickness with more homogeneous morphology compared to those formed in deposition times of 60 and 90 min. It also showed, from the electrochemical impedance spectroscopy measurements, the lowest charge transfer resistance value associated to the its highest value for the double-layer capacitance of 180 Fg(-1) making it a very strong candidate as a supercapacitor electrode. (AU)

• Processo FAPESP: 09/17584-0 - Estudo de Compósitos de Nanotubos de Carbono, Fibras de Carbono e Polianilina como Eletrodos em Dispositivos de Conversão e Armazenamento de Energia.
• Beneficiário: Dalva Alves de Lima Almeida
• Modalidade de apoio: Bolsas no Brasil - Doutorado