期刊
JOURNAL OF POWER SOURCES
卷 512, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2021.230484
关键词
Radiation-induced grafting; Anion-exchange membrane; Fuel cell; Pre-irradiation method; Simultaneous method; AEMFC
资金
- Center for Innovation on New Energies (CINE) - SHELL (ANP)/FAPESP [2017/11937-4]
- Brazilian Nuclear Energy Commission (CNEN)
- FAPESP [2014/09087-4, 2019/26955-3]
- International Atomic Energy Agency [IAEA RC 23708]
The study investigated the effect of radiation-induced grafting (RIG) method on the properties of anion-exchange membranes (AEM), finding that the grafting method determines the physicochemical properties of AEM, which in turn affect the performance and stability of fuel cells.
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.
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