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http://hdl.handle.net/1843/57738| Type: | Artigo de Periódico |
| Title: | Development of nanohybrids based on carbon nanotubes/p(edot-co-mpy) and p(edot-co-pymp) copolymers as electrode material for aqueous supercapacitors |
| Authors: | Glenda Ribeiro de Barros Silveira Lacerda Garbas Anacleto dos Santos Maria Luiza Miranda Rocco Rodrigo Lassarote Lavall Tulio Matencio Hállen Daniel Rezende Calado |
| Abstract: | We present the synthesis of nanohybrids based on carbon nanotube with EDOT/Py derivatives copolymers, P(EDOT-co-MPy) and P(EDOT-co-PyMP). These hybrids were prepared with functionalized MWCNT via in-situ polymerization for aqueous supercapacitor applications. The chemical structure and morphology of the hybrids were compared with those of neat copolymers and MWCNTs using FTIR, Raman and XPS spectroscopies. The results provided evidence of a covalent attachment between the copolymer and nanotubes. The electrodes were used in symmetric supercapacitor cell configuration and their performance was evaluated using cyclic voltammetry (CV), galvanostatic charge/discharge tests and electrochemical impedance spectroscopy (EIS). The hybrids presented an improvement in the capacitance values compared to a pure capacitive system (MWCNT) and the neat copolymers. The rate capability of the cells was also improved as a result of an enhancement in charge transfer in the nanohybrids. The devices showed high performance with excellent cycling stability, compared to the poor cyclability of the conjugated polymers, even after 20,000 cycles. |
| Subject: | Eletroquímica Polímeros conjugados Nanotubos de carbono Medidores de capacitância Síntese Raman, Espectroscopia de Termogravimetria Voltametria Microscopia eletrônica Espectroscopia de infravermelho |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE QUÍMICA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | https://doi.org/10.1016/j.electacta.2020.135637 |
| URI: | http://hdl.handle.net/1843/57738 |
| Issue Date: | 2020 |
| metadata.dc.url.externa: | https://www.sciencedirect.com/science/article/pii/S0013468620300281 |
| metadata.dc.relation.ispartof: | Electrochimica Acta |
| Appears in Collections: | Artigo de Periódico |
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