Long‐Term Performance of Chemically and Physically Modified Activated Carbons in Air Cathodes of Microbial Fuel Cells
  • 159 views
  • Author:
    Xiaoyuan Zhang, Deepak Pant, Fang Zhang, Jia Liu, Weihua He, Bruce E Logan
  • Abstract:

    Activated carbon (AC) is a low‐cost and effective catalyst for oxygen reduction in air cathodes of microbial fuel cells (MFCs), but its performance must be maintained over time.

    AC was modified by three methods: 1) pyrolysis with iron ethylenediaminetetraacetic acid (AC‐Fe), 2) heat treatment (AC‐heat), and 3) mixing with carbon black (AC‐CB). The maximum power densities after one month with these AC cathodes were 35 % higher with AC‐Fe (1410±50 mW m−2) and AC‐heat (1400±20 mW m−2), and 16 % higher with AC‐CB (1210±30 mW m−2) than for plain AC (1040±20 mW m−2), versus 1270±50 mW m−2 for a Pt control. After 16 months, the Pt cathodes produced only 250±10 mW m−2. However, the AC‐heat and AC‐CB cathodes still produced 960–970 mW m−2, whereas plain AC produced 860±60 mW m−2. The performance of the AC cathodes was restored to >85 % of the initial maximum power densities by cleaning with a weak acid solution. 

    Based on cost considerations among the AC materials, AC‐CB appears to be the best choice for long‐term performance.

  • Journal:
    ChemElectroChem
  • Publisher:
    WILEY‐VCH Verlag
  • Volume (Issue):
    1 ( 11 )
  • Page:
    1859-1866
  • Sector:
    Biomass and Biowaste    Bioenergy and Biofuel   
  • Publication Type:
    Research Article
  • View Full Publication
  • Memory Quiz

Quick Contact

I accept  terms and conditions of Greenesa.