Performance deterioration and recovery in high-temperature polymer electrolyte membrane fuel cells: Effects of deliquescence of phosphoric acid
- Authors
- Park H.; Kim H.; Kim D.-K.; Lee W.J.; Choi I.; Kim H.-J.; Kim, Soo-Kil
- Issue Date
- 20-Nov-2020
- Publisher
- Elsevier Ltd
- Keywords
- Deliquescence; High-temperature polymer electrolyte membrane fuel cell; Humidity; Performance recovery; Phosphoric acid (H3PO4); Polybenzimidazole (PBI) membrane
- Citation
- International Journal of Hydrogen Energy, v.45, no.57, pp 32844 - 32855
- Pages
- 12
- Journal Title
- International Journal of Hydrogen Energy
- Volume
- 45
- Number
- 57
- Start Page
- 32844
- End Page
- 32855
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/40089
- DOI
- 10.1016/j.ijhydene.2020.03.039
- ISSN
- 0360-3199
1879-3487
- Abstract
- Phosphoric acid (PA)-doped polybenzimidazole (PBI) membranes used in high-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) have high proton conductivity, and excellent mechanical and thermal stability. However, the deliquescence of PA leads to performance deterioration in humid atmosphere. The performance degradation upon exposure of the PA-doped membrane to humidity and the changes in the performance as a function of the PA loading in the electrodes are investigated. The performance of the HT-PEMFC employing the humidity-exposed membrane declines by 74.1% compared to that of the pristine membrane due to ineffective formation of the three-phase boundary. Loading a small amount of PA into the electrode induces drastic performance recovery with a decrease in the charge transfer resistance, especially at the anode. PA-dosing of both electrodes produces the best performance recovery, exceeding that of the pristine counterparts. This is a simple and effective method of recovering the performance of HT-PEMFCs after humidity-related deterioration. © 2020 Hydrogen Energy Publications LLC
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