| Texto completo | |
| Autor(es): |
Egemole, Franklin O.
;
Biancolli, Ana Laura G.
;
Holdcroft, Steven
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Electrochimica Acta; v. 508, p. 8-pg., 2024-10-31. |
| Resumo | |
Fluorinated proton-exchange membranes (PEMs), such as NafionTM, which is the current state-of-the-art polymer, present environmental challenges, driving the need for more sustainable alternatives for proton-exchange membrane water electrolysis (PEMWE) systems. However, fluorine-free membranes like sulfo-phenylated polyphenylene biphenyl (sPPB-50) often suffer from mechanical instability, excessive swelling, and limited cell durability, which hinder their practical applications. This study explores reinforced fluorine-free sulfo-phenylated polyphenylene membranes (PemionTM) with thicknesses of 15 mu m (Pemion-15) and 40 mu m (Pemion-40) as a potential solution to these issues. Pemion membranes were compared with both sPPB-50 and NafionTM 112 (N112), focusing on key properties such as water uptake, dimensional swelling, proton conductivity, and durability in PEMWE applications. The results show that Pemion-reinforced membranes exhibit good performance for PEMWE allowing high current densities at lower voltages. Pemion-40 exhibited a low hydrogen gas crossover compared to sPPB-50 and N112. Under a constant current of 1 A cm- 2 , Pemion-40 exhibited a voltage loss rate of 1.46 mV h- 1 over 100 h of operation. This study highlights the importance of structural reinforcement in enhancing the stability and efficiency of fluorine-free membranes, providing a promising route for sustainable alternatives in PEMWE systems. (AU) | |
| Processo FAPESP: | 19/26955-3 - Síntese de membranas e ionômeros de troca aniônica para aplicação em dispositivos de conversão eletroquímica |
| Beneficiário: | Ana Laura Gonçalves Biancolli |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 21/14786-2 - Membranas de troca aniônica altamente estáveis: síntese e aplicações eletroquímicas |
| Beneficiário: | Ana Laura Gonçalves Biancolli |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |
| Processo FAPESP: | 17/11937-4 - Rota sustentável para a conversão de metano com tecnologias eletroquímicas avançadas |
| Beneficiário: | Fabio Coral Fonseca |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Centros de Pesquisa Aplicada |