PAFC Electrolyte, Electrode, and Catalyst

Because of its commercialization potential, PAFC component development has progressed well from 1965 to the present. Table 9.2 summarizes the evaluation of PAFC components. In the mid-1960s, the conventional porous electrodes were PTFE-bonded Pt black, and the loadings were approximately 9 mg Pt/cm. During the past two decades, Pt supported on carbon black has replaced Pt black in porous PTFE-bonded electrode structures as the electrocatalyst. A dramatic reduction in Pt loading has also occurred the loadings are currently approximately 0.10 mg Pt/cm in the anode and approximately 

Anode PTFE-bonded Pt black 9 mg Pt cm 2 PTFE-bonded Pt/C Vulcan XC-72a 0.25 mg Pt cm PTFE-bonded Pt/C 0.25 mg Pt cm  

Electrode support Ta mesh screen Graphite structure Graphite structure 

Electrolyte support Glass fiber paper PTFE-bonded SiC PTFE-bonded SiC 

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