Bioengineering and Environmental Sciences Lab, Department of Energy and Environmental Engineering, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India; Department of Chemistry, Sri Venkateswara University, Tirupati 517 502, Andhra Pradesh, India.
Bioengineering and Environmental Sciences Lab, Department of Energy and Environmental Engineering, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India.
Bioresour Technol. 2021 Jan;320(Pt B):124340. doi: 10.1016/j.biortech.2020.124340. Epub 2020 Oct 29.
Internal resistance is one of the limiting factors for power production in microbial fuel cells (MFC). To overcome this, current study designed polyaniline functionalized activated carbon (PANi-FAC) composite as capacitive anode with strategic electrocatalytic capability, and was comparatively assessed with SSM-PANi and bare SSM as anodes in three double chambered MFCs respectively. Power output and COD removal efficiency of PANi-FAC coated on stainless steel mesh (SSM-PANi/FAC) is superior (322 mW/m; 87.6%) in comparison to SSM-PANi (273 mW/m; 62.4%) and bare SSM (169 mW/m; 54%). In addition, maximum specific capacitance of hybrid electrodes is relatively high with SSM-PANi/FAC (360.84 F/g) than SSM-PANi anode (128.26 F/g). Nyquist impedance plots showed less charge-transfer resistance (Rct) with SSM-PANi/FAC (29.9 Ω) than SSM-PANi (206.8 Ω) and SSM anodes (678 Ω). Study infers that, development of electrochemical double layer capacitance makes SSM-PANi/FAC, a potential capacitive anode for augmenting bio-electrocatalytic activity and reducing Ohmic losses.
内阻是微生物燃料电池（MFC）发电的限制因素之一。为了克服这一问题，本研究设计了具有战略电催化能力的聚苯胺功能化活性炭（PANi-FAC）复合材料作为电容阳极，并将其与 SSM-PANi 和裸 SSM 分别作为阳极在三个双室 MFC 中进行了比较评估。与 SSM-PANi（273 mW/m；62.4%）和裸 SSM（169 mW/m；54%）相比，不锈钢网上涂有 PANi-FAC 的 PANi-FAC（SSM-PANi/FAC）的功率输出和 COD 去除效率更高（322 mW/m；87.6%）。此外，混合电极的最大比电容相对较高，SSM-PANi/FAC（360.84 F/g）高于 SSM-PANi 阳极（128.26 F/g）。奈奎斯特阻抗图显示，SSM-PANi/FAC 的电荷转移电阻（Rct）（29.9 Ω）低于 SSM-PANi（206.8 Ω）和 SSM 电极（678 Ω）。研究推断，电化学双层电容的发展使 SSM-PANi/FAC 成为一种潜在的电容阳极，可以增强生物电催化活性并降低欧姆损耗。
