Artigo de peri??dico
Unveiling the influence of radiation-induced grafting methods on the properties of polyethylene-based anion-exchange membranes for alkaline fuel cells
Registro en:
0378-7753
512
10.1016/j.jpowsour.2021.230484
0000-0002-5972-5933
0000-0003-0708-2021
0000-0002-0127-8130
83.98
94.50
Autor
BIANCOLLI, ANA L.G.
BARBOSA, ANDREY S.
KODAMA, YASKO
SOUZA JUNIOR, ROGERIO R. de
LANFREDI, ALEXANDRE J.C.
FONSECA, FABIO C.
REY, JOSE F.Q.
SANTIAGO, ELISABETE I.
Resumen
Anion-exchange membranes (AEM) are envisioned as the enabling materials for the widespread use of cost-effective 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. Funda????o de Amparo ?? Pesquisa do Estado de S??o Paulo (FAPESP) International Atomic Energy Agency (IAEA) FAPESP: 17/11937-4; 14/09087-4; 19/26955-3 IAEA: RC 23708