Unveiling the influence of radiation-induced grafting methods on the properties of polyethylene-based anion-exchange membranes for alkaline fuel cells

Autor(es)

Biancolli, Ana Laura G. ^[1] ; Barbosa, Andrey S. ^[1] ; Kodama, Yasko ^[1] ; de Sousa, Jr., Rogerio R. ^[2] ; Lanfredi, Alexandre J. C. ^[2] ; Fonseca, Fabio C. ^[1] ; Rey, Jose Fernando Q. ^[2] ; Santiago, Elisabete I. ^[1]

Afiliação do(s) autor(es)

^[1] CNEN, IPEN, Nucl & Energy Res Inst, BR-05508000 Sao Paulo - Brazil

^[2] Fed Univ ABC UFABC, Ctr Engn Modelling & Appl Social Sci, BR-09210580 Santo Andre, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Power Sources; v. 512, NOV 15 2021.
• Citações Web of Science: 0

Resumo

Anion-exchange membranes (AEM) are envisioned as the enabling materials for the widespread use of costeffective and efficient polymeric fuel cells. Advancing the understanding of the effect of radiation-induced grafting (RIG) method on the final properties of AEMs is crucial to boost the performance of anion-exchange membrane fuel cells (AEMFCs). The present study provides a systematic investigation of the effect of RIG methods on physicochemical properties of LDPE-based AEMs with similar degree of grafting (DoG) and ion exchange capacity (IEC). Samples grafted by two methods - pre-irradiation (PIM) and simultaneous (SM) - have the same molecular structure, but distinct physicochemical properties due to markedly differences in the degree of crosslinking. Detailed characterization of AEMs showed that RIG method determines the mechanical properties, water transport, and the distribution of ionic groups, which have a direct impact on fuel cell performance and durability. The discussed results show that grafting step directly influences the internal structure and morphology. Controlling the synthesis parameters during RIG is a key feature to design AEMs with enhanced properties that lead to high AEMFC performance and stability. (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: 14/09087-4 - Estudos sobre o uso do bioetanol em células a combustível do tipo PEMFC e SOFC
• Beneficiário: Marcelo Linardi
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• 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 em Engenharia