Líquido iônico em matriz termorrígida como eletrólito para utilização em altas temperaturas

• Ano de defesa: 2017
• Autor(a) principal: Silva, Luís Carlos Oliveira da
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Rio de Janeiro; Brasil; Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia; Programa de Pós-graduação em Planejamento Energético; UFRJ
• Palavras-chave em Português: Planejamento Energético; CNPQ::ENGENHARIAS::ENGENHARIA DE PRODUCAO
• Link de acesso: http://hdl.handle.net/11422/8304

Flexible epoxy network loaded with high amount of ionic liquid 1-decyl-3- methylimidazolium bromide ([DMIM]Br) has been reported by using a mixture of polyol amine as curing agent. The ionic liquid presents good electrochemical response even at 170 °C, as no evidence of redox reactions was observed. The incorporation of as high as 50 wt% of this IL within the epoxy matrix resulted in solid and flexible electrolyte with good thermal stability below 180 °C, as measured by thermogravimetric analysis and ionic conductivity of around 10-6 S.cm-1 at room temperature and higher than 10-3 S.cm1 at high temperature. This electrolyte presented a prodigious potential for applications in electrochemical devices at high temperature like batteries and supercapacitors, and the flexibility of this solid electrolyte persist at low temperature because of its low glass transition temperature. Thereby, impedance spectroscopy, and cyclic voltammetry were performed to characterize the electrochemical properties.