Carbon nanotube/polyaniline composite as anode material for microbial fuel cells

Abstract A carbon nanotube (CNT)/polyaniline (PANI) composite is evaluated as an anode material for high-power microbial fuel cells (MFCs). Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) are employed to characterize the chemical composition and morphology of plain PANI and the CNT/PANI composite. The electrocatalytic behaviour of the composite anode is investigated by means of electrochemical impedance spectroscopy (EIS) and discharge experiments. The current generation profile and constant current discharge curves of anodes made from plain PANI, 1 wt.% and 20 wt.% CNT in CNT–PANI composites reveal that the performance of the composite anodes is superior. The 20 wt.% CNT composite anode has the highest electrochemical activity and its maximum power density is 42 mW m−2 with Escherichia coli as the microbial catalyst. In comparison with the reported performance of different anodes used in E. coli-based MFCs, the CNT/PANI composite anode is excellent and is promising for MFC applications.

[1]  D. Park,et al.  Improved fuel cell and electrode designs for producing electricity from microbial degradation. , 2003, Biotechnology and bioengineering.

[2]  Allen J. Bard,et al.  Electrochemical Methods: Fundamentals and Applications , 1980 .

[3]  Robert C. Haddon,et al.  Proton exchange membrane fuel cells with carbon nanotube based electrodes , 2004 .

[4]  H. P. Bennetto,et al.  Microbial fuel-cells , 1993 .

[5]  F C Walsh,et al.  Biofuel cells and their development. , 2006, Biosensors & bioelectronics.

[6]  Vahid Mottaghitalab,et al.  The influence of carbon nanotubes on mechanical and electrical properties of polyaniline fibers , 2005 .

[7]  Evangelyn C. Alocilja,et al.  Fabrication of a disposable biosensor for Escherichia Coli O157:H7 detection , 2003 .

[8]  D. Lovley,et al.  Electricity generation by direct oxidation of glucose in mediatorless microbial fuel cells , 2003, Nature Biotechnology.

[9]  Youngjin Choi,et al.  Effect of initial carbon sources on the electrochemical detection of glucose by Gluconobacter oxydans. , 2002, Bioelectrochemistry.

[10]  L. Forró,et al.  Cellular toxicity of carbon-based nanomaterials. , 2006, Nano letters.

[11]  J. Luong,et al.  Sensitive amperometric immunosensing using polypyrrolepropylic acid films for biomolecule immobilization. , 2006, Analytical chemistry.

[12]  Leong Ming Gan,et al.  Preparation and characterization of platinum-based electrocatalysts on multiwalled carbon nanotubes for proton exchange membrane fuel cells , 2002 .

[13]  Plamen Atanassov,et al.  Glucose oxidase anode for biofuel cell based on direct electron transfer , 2006 .

[14]  John Ballato,et al.  Carbon Nanotube Doped Polyaniline , 2002 .

[15]  Stefano Freguia,et al.  Microbial fuel cells: methodology and technology. , 2006, Environmental science & technology.

[16]  R. L. Elsenbaumer,et al.  Handbook of conducting polymers , 1986 .

[17]  Uwe Schröder,et al.  Fluorinated polyanilines as superior materials for electrocatalytic anodes in bacterial fuel cells , 2004 .

[18]  Wei Chen,et al.  Impedance labelless detection-based polypyrrole protein biosensor. , 2005, Frontiers in bioscience : a journal and virtual library.

[19]  Wei Zheng,et al.  Carbon‐Nanotube‐Based Glucose/O2 Biofuel Cells , 2006 .

[20]  A. M. Baró,et al.  Soluble Self‐Aligned Carbon Nanotube/Polyaniline Composites , 2005 .

[21]  R. Bareille,et al.  Study of the cytotoxicity of CCVD carbon nanotubes , 2006 .

[22]  Wolfgang Knoll,et al.  Properties of polyaniline/carbon nanotube multilayer films in neutral solution and their application for stable low-potential detection of reduced beta-nicotinamide adenine dinucleotide. , 2005, Langmuir : the ACS journal of surfaces and colloids.

[23]  Hu-lin Li,et al.  Well-dispersed multi-walled carbon nanotube/polyaniline composite films , 2005 .

[24]  Lei Zhang,et al.  A review of anode catalysis in the direct methanol fuel cell , 2006 .

[25]  W. Verstraete,et al.  Microbial fuel cells: novel biotechnology for energy generation. , 2005, Trends in biotechnology.