Negligible Start-Stop-Cycle Degradation in a PEFC Utilizing Platinum-Decorated Tin Oxide Electrocatalyst Layers with Carbon Fiber Filler

作者：Kanda K^*; Noda Z; Nagamatsu Y; Higashi T; Taniguchi S; Lyth S M; Hayashi A; Sasaki K

来源：ECS Electrochemistry Letters, 2014, 3(4): F15-F18.

DOI：10.1149/2.005404eel

Niobium-doped SnO2 is selected as an alternative carbon-free support material to negate carbon corrosion in polymer electrolyte fuel cells (PEFCs) electrocatalysts. The durability is measured using a membrane electrode assembly (MEA) over 60,000 start-stop cycles at high potential, equating to the lifetime of fuel cell vehicles. Using the Nb-doped SnO2 support results in retention of 99% of the initial cell voltage. The current-voltage characteristics are improved by adding carbon nanofibers as fillers in the Nb-doped SnO2, indicating that electronic conduction in the electrocatalyst layer is critical in the application of metal oxide-supported electrocatalysts.

• 出版日期2014