Naslov
Challenges in automotive polymer electrolyte fuel cell applications

Autori
Marius, Bernhard ; Penga, Željko ; Hacker, Viktor

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, prošireni sažetak, znanstveni

Izvornik
ISE 2019 / - , 2019, Pdf-pdf

Skup
70th Annual Meeting of the International Society of Electrochemistry: Electrochemistry – Linking Resources to Sustainable Development

Mjesto i datum
Durban, Južnoafrička Republika, 04.08.2019. - 09.08.2019

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
PEM fuel cells ; Lifetime ; Dynamic Load Change ; Accelerated Degradation

Sažetak
Abstract - Polymer membrane fuel cells are of high interest for automotive applications because of their high efficiency and zero emission propulsion system. The main challenge to bring these systems into the commercial market is the lifetime and the costs. The permanent fluctuation in energy demand leads to harmful conditions inside the fuel cell. Situations like sudden high load changes, start up and shut down procedures as well as fuel starvation and improper humidification of the cell can cause either very high or low voltage levels. This undesired voltage levels accelerate the degradation of the cell in terms of carbon corrosion, platinum oxidation and membrane decomposition. Experiments with single cells are a good indicator which condition is harmful to the cell but do not reflect the behavior of each cell inside a stack. Commercial fuel cell stacks are built up of several hundred single cells and not all effects during operation can be simulated by single cell experiment e.g. the pressure drop and the humidity increase within the gas flow channels. Also the system influence in terms of thermal and dynamic response velocity cannot be done with single cells.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Strojarstvo

POVEZANOST RADA