Talk: Radiation-grafted anion-exchange polymer electrolyte materials for alkaline membrane fuel cells

Talk by Professor John Varcoe

University of Surrey
 

Abstract: 
This talk will describe the latest state-of-the-art in developing radiation-grafted anion-exchange membranes (RG-AEM) and ionomer powders (RG-AEI) for use in alkaline membrane fuel cells (AEMFC).

A recent finding is that the switch from using low-density polyethylene (LDPE) as a precursor film to using high-density polyethylene (HDPE) film leads to RG-AEMs that perform better in AEMFCs (better power output and in situ durability). When used in combination with partially fluorinated ETFE-based RG-AEIs in the electrodes, peak power densities of 2.5 W cm 2 can be achieved in H2/O2 AEMFCs 70 – 80°C.

Less than 8% degradation in cell voltage was achieved in a H2/air(CO2-free) AEMFC at 70°C over a 440 h constant current discharge of 600 mA cm-2 (this cell with CO2-free air yielded a peak power output of 1.1 W cm-2). The represent world-leading AEMFC performances.

 

Tidspunkt

ons 06 mar 19
10:00

Arrangør

DTU Fysik

Hvor

DTU Lyngby
Bygning 324
Rum 20