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    STUDIA CHEMIA - Issue no. 3 / 2015  
         
  Article:   SPECTRAL GRAPHITE AS ELECTRODE MATERIAL FOR THE ALL-VANADIUM REDOX FLOW BATERY.

Authors:  DANA-MARIA SABOU, SORIN-AUREL DORNEANU, PETRU ILEA.
 
       
         
  Abstract:   The ability of unmodified or PbO2 coated spectral graphite (SG), to act as positive electrode in an all vanadium redox flow battery was tested. Our results showed that the unmodified SG requires simple pretreatment and is efficient in terms of current due to a large active area, 4 time greater that the geometrical one. The PbO2 deposits were grown on surfaces that previously received only basic treatment, but present a poor stability. In all experiments, large separations of anodic and cathodic peak potentials (between 118 and 1015 mV) were observed, proving the irreversibility of the VV to VIV redox couple on all studied materials.

Keywords: all vanadium battery, spectral graphite, cyclic voltammetry
 
         
     
         
         
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