Carbon material optimized biocathode for improving microbial fuel cell performance

Frontiers in Microbiology

Xiaohui eWang¹  Rui eLiu²  Yanmei eGao²  Jing eLi²  Hairti eTursun²  Yuan eLi²  Rashid Abro eAbro³ 

[1] College of Chemical Engineering, Beijing University of Chemical Technology;Beijing Engineering Research Center of Environmental Material for Water Purification, Beijing University of Chemical Technology;;Beijing Key Laboratory of Membrane Science and Technology &

关键词: microbial fuel cells;    carbon materials;    Power generation;    Coulombic efficiency;    Biocathode;   

DOI  :  10.3389/fmicb.2016.00006

来源: DOAJ

【 摘 要 】

To improve the performance of microbial fuel cells (MFCs), the biocathode electrode material of double-chamber was optimized. Alongside the basic carbon fiber brush, three carbon materials namely graphite granules, activated carbon granules and activated carbon powder, were added to the cathode-chambers to improve power generation. The result shows that the addition of carbon materials increased the amount of available electroactive microbes on the electrode surface and thus promote oxygen reduction rate, which improved the generation performance of the MFCs. The Output current (external resistance = 1000 Ω) greatly increased after addition of the three carbon materials and maximum power densities in current stable phase increased by 47.4%, 166.1% and 33.5%, respectively. Additionally, coulombic efficiencies of the MFC increased by 16.3%, 64.3% and 20.1%, respectively. These results show that MFC when optimized with activated carbon granules show better power generation, higher chemical oxygen demands (COD) removal rate and coulombic efficiency.

【 授权许可】

Unknown