Journal
CURRENT OPINION IN ELECTROCHEMISTRY
Volume 5, Issue 1, Pages 43-55Publisher
ELSEVIER
DOI: 10.1016/j.coelec.2017.10.020
Keywords
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Funding
- New and Renewable Energy grant of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Ministry of Trade, Industry and Energy, Republic of Korea [20153010031920]
- Danish Strategic Research Council under the 4M grant (Energy and Environment) [12-132710]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20153010031920] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Low proton conduction, resulting from interrupted H+ hopping between water molecules to form H3O+ ions, significantly complicates the operation of proton exchange membrane fuel cells at intermediate temperatures (80-120 degrees C) and low relative humidities (<50%), which are the conditions imposed by thermal and water management considerations. Importantly, the performance of the above cells is influenced by water channeling in proton exchangeable polymers, since high ionic conductivities at intermediate temperatures and low relative humidities are achieved due to the high water retention and good hydrophobic/hydrophilic segregation ability of these polymers. Therefore, to summarize the current state-of-the-art, this review focuses on the recently developed approaches to preserving good ionic conductivity under the aforementioned conditions or maintaining good ionic conductivity and preventing excessive water swelling under other ones.
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