期刊
MATERIALS TODAY
卷 58, 期 -, 页码 135-163出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mattod.2022.06.021
关键词
Antioxidant; Polymer electrolyte membrane; Per fluorosulfonic acid; Fuel cell; Durability
资金
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korea government (MOTIE) [20188550000440, 20213030030260, NRF-2021M3I3A1082879]
- National Research Foundation (NRF) of Korea - Korea government (Ministry of Science and ICT, MSIT) [NRF-2021M3I3A1082879]
- KIST Institutional Program [2E31871]
- NSF [CBET-2005250]
- Hong Kong Quantum AI Lab Ltd.
- NRF of Korea - Korea government (MSIT) [2022R1C1C2004703]
- Korea Institute of Energy Technology Evaluation & Planning (KETEP) [20213030030260] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2022R1C1C2004703] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This review discusses the opportunities and limitations of antioxidant therapy for enhancing durability in polymer electrolyte membrane fuel cells (PEMFCs). Long-term use of antioxidants may lead to adverse degradation, while changes in the physical state can reduce antioxidant activity and capacity.
While polymer electrolyte membrane fuel cells (PEMFCs) have surged in popularity due to their low environmental impact and high efficiency, their susceptibility to degradation by in-situ generated peroxide and oxygen radical species has prevented their widespread adoption. To alleviate chemical attack on components of PEMFCs, particularly on polymer electrolyte membranes (PEMs), antioxidant approaches have been the subject of enormous interest as a key solution because they can directly scavenge and remove detrimental peroxide and oxygen radical species. However, a consequence is that long-term PEMFC device operation can cause undesirable adverse degradation of antioxidant additives provoked by the distinctive chemical/electrochemical environment of low pH, electric potential, water flux, and ion exchange/concentration gradient. Moreover, changes in the physical state such as migration, agglomeration, and dissolution of antioxidants by mechanical or chemical pressures are serious problems that gradually deteriorate antioxidant activity and capacity. This review presents current opportunities for and limitations to antioxidant therapy for durability enhancement in PEMs for electrochemical device applications. We also provide a summary of advanced synthetic design strategies and in-depth analyses of antioxidants regarding optimizing activity-stability factors. This review will bring new insight into the design to realization of ideal antioxidant nanostructures for PEMs and open up new opportunities for enhancing proliferation of durable PEMFCs.
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