A novel aluminium-air semi-fuel cell operating with hydrogen peroxide co-generation

摘要

An original Al-air semi-fuel cell (SFC) system, operating with hydrogen peroxide (H_2O_2) co-generation was developed. The cell design was optimized and operating conditions were selected in the comparative study of different of anion-exchange MA-40, AMI 7001S and cation-exchange MK-40, NAFION 117 membranes, gas-diffusion electrodes (GDE) Black Pearls 2000 (BP 2000), Vulcan XC-72 (XC-72), nature and concentration of electrolytes (NaOH, KOH and NaCl). Their influence on electric characteristics (current density and generated power) and current efficiency of H_2O_2 generation was studied. The best results were achieved were using BP 2000 GDE in the SFC divided by anion-exchange membrane (AEM) with 6M KOH as an electrolyte. However, some acceptable results were achieved even using dilute chloride solutions. Finally, the scale-up experiments showed that the specific electric characteristics of the fuel cell (FC) enhanced at 15-fold increase of the electrode area.