Power Generation Charactristics of Polymer Electrolyte Fuel Cells with Electrocatalysts Supported on SnO₂ in High Current Density Range
Taichi Ogawa, Shogo Nakamura, Ryo Miyamoto, Masahiro Yasutake +5
AI summary
70% confidenceResearchers developed a SnO2-supported electrocatalyst using mesoporous carbon to improve durability and performance in polymer electrolyte fuel cells, particularly in high current density ranges.
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Abstract
The durability of cathode catalysts in polymer electrolyte fuel cells remains a significant technical issue. Start-stop cycles cause carbon support corrosion and Pt catalyst particle detachment from the support leading to a significant cell degradation. SnO 2 -supported electrocatalysts using carbon materials as the conducting framework have the potential to achieve both high activity and high durability. However, cell performance in the high current density range needs to be improved to apply them to heavy-duty vehicles. This study selected mesoporous carbon (MC) as the conductive framework because the use of mesopores could also improve load-cycle durability. In this study, the microstructure of the electrocatalyst layers using Pt/Sn 0.98 Nb 0.02 O 2 /MC is controlled to improve the power generation of the cells. In addition, Pt/Sn 0.98 Nb 0.02 O 2 /MC electrocatalyst demonstrates durability improvement against the start-stop cycles.
Key findings
- Pt/Sn0.98Nb0.02O2/MC electrocatalyst demonstrated improved durability against start-stop cycles.
- Mesoporous carbon improved load-cycle durability and cell performance in high current density ranges.
- Controlled microstructure of electrocatalyst layers improved power generation of cells.
Keywords
Identifiers
- Journal
- ECS Transactions
- Year
- 2023