A high power density miniaturized microbial fuel cell having carbon nanotube anodes

Ren, Hao; Pyo, Soonjae; Lee, Jae Ik; Park, Tae‐Jin; Gittleson, Forrest S.; Leung, Fung Ping; Kim, Jongbaeg; Taylor, André D.; Lee, Hyung-Sool; Chae, Junseok

doi:10.1016/j.jpowsour.2014.09.165

Cited by 117 publications

(68 citation statements)

References 74 publications

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“…The unique properties of carbon nanotubes (CN) such as high conductivity and surface area [116] have made them suitable for many areas of research such as: sensors [117], field effect transistors [118], biological materials [119], hydrogen storage [120], solar cells [121] and fuel cells [122]. As for medical applications, the reports on their toxicity are still debatable but the efficacy of carbon nanotubes to deliver a variety of drugs ranging from small molecules to peptides and proteins has been demonstrated.…”

Section: Nanotubular Structuresmentioning

confidence: 99%

Electrodeposited conductive polymers for controlled drug release: polypyrrole

Alshammary

Walsh

Herrasti

et al. 2015

J Solid State Electrochem

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Over the last 40 years, electrically conductive polymers have become well established as important electrode materials. Polyanilines, polythiophenes and polypyrroles have received particular attention due to their ease of synthesis, chemical stability, mechanical robustness and the ability to tailor their properties. Electrochemical synthesis of these materials as films have proved to be a robust and simple way to realise surface layers with controlled thickness, electrical conductivity and ion transport. In the last decade, the biomedical compatibility of electrodeposited polymers has become recognised; in particular, polypyrroles have been studied extensively and can provide an effective route to pharmaceutical drug release. The factors controlling the electrodeposition of this polymer from practical electrolytes are considered in this review including electrolyte composition and operating conditions such as the temperature and electrode potential. Voltammetry and current-time behaviour are seen to be effective techniques for film characterisation during and after their formation. The degree of take-up and the rate of drug release depend greatly on the structure, composition and oxidation state of the polymer film. Specialised aspects are considered, including galvanic cells with a Mg anode, use of catalytic nanomotors or implantable biofuel cells for a self-powered drug delivery system and nanoporous surfaces and nanostructures. Following a survey of polymer and drug types, progress in this field is summarised and aspects requiring further research are highlighted.

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Section: Nanotubular Structuresmentioning

confidence: 99%

Electrodeposited conductive polymers for controlled drug release: polypyrrole

Alshammary

Walsh

Herrasti

et al. 2015

J Solid State Electrochem

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“…Ren et al found that the CNT-based electrode materials: Spin-Spray Layer-by-Layer (SSLbL) CNT can guarantee a thicker biofilm than other CNT materials. Therefore, it can result in a high current density of 2.59 A/m 2 [20]. Although, these studies stated that enhanced biofilm thickness lead to the enhanced electricity production of MFC, but most of the biofilm formation is dependent on natural adsorption [21].…”

Section: Introductionmentioning

confidence: 99%

Effect of Wall Boundary Layer Thickness on Power Performance of a Recirculation Microbial Fuel Cell

2018

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Abstract:Hydrodynamic boundary layer is a significant phenomenon occurring in a flow through a bluff body, and this includes the flow motion and mass transfer. Thus, it could affect the biofilm formation and the mass transfer of substrates in microbial fuel cells (MFCs). Therefore, understanding the role of hydrodynamic boundary layer thicknesses in MFCs is truly important. In this study, three hydrodynamic boundary layers of thickness 1.6, 4.1, and 5 cm were applied to the recirculation mode membrane-less MFC to investigate the electricity production performance. The results showed that the thin hydrodynamic boundary could enhance the voltage output of MFC due to the strong shear rate effect. Thus, a maximum voltage of 21 mV was obtained in the MFC with a hydrodynamic boundary layer thickness of 1.6 cm, and this voltage output obtained was 15 times higher than that of MFC with 5 cm hydrodynamic boundary layer thickness. Moreover, the charge transfer resistance of anode decreased with decreasing hydrodynamic boundary layer thickness. The charge transfer resistance of MFC with hydrodynamic boundary layer of thickness 1.6 cm was 39 Ω, which was 0.79 times lesser than that of MFC with 5 cm thickness. These observations would be useful for enhancing the performance of recirculation mode MFCs.

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“…Microbial fuel cells (MFC) are electrochemical devices that exploit the metabolic abilities of the microorganisms to convert the chemical energy contained in organic and inorganic substrates into electricity [1]. In an MFC, substrates are oxidized at the anodic chamber, whereby the electrons are released, directly or by means of mediators, to the solid electrode.…”

Section: Introductionmentioning

confidence: 99%

Heterotrophic Anodic Denitrification in Microbial Fuel Cells

Drewnowski

Fernández-Morales

2016

Sustainability

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Nowadays, pollution caused by energy production systems is a major environmental concern. Therefore, the development of sustainable energy sources is required. Amongst others, the microbial fuel cell (MFC) seems to be a possible solution because it can produce clean energy at the same time that waste is stabilized. Unfortunately, mainly due to industrial discharges, the wastes could contain nitrates, or nitrates precursors such ammonia, which could lead to lower performance in terms of electricity production. In this work, the feasibility of coupling anodic denitrification process with electricity production in MFC and the effect of the nitrates over the MFC performance were studied. During the experiments, it was observed that the culture developed in the anodic chamber of the MFC presented a significant amount of denitrificative microorganisms. The MFC developed was able to denitrify up to 4 ppm, without affecting the current density exerted, of about 1 mA/cm 2 . Regarding the denitrification process, it must be highlighted that the maximum denitrification rate achieved with the culture was about 60 mg¨NO 3´¨L´1¨h´1 . Based on these results, it can be stated that it is possible to remove nitrates and to produce energy, without negatively affecting the electrical performance, when the nitrate concentration is low.

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A high power density miniaturized microbial fuel cell having carbon nanotube anodes

Cited by 117 publications

References 74 publications

Electrodeposited conductive polymers for controlled drug release: polypyrrole

Electrodeposited conductive polymers for controlled drug release: polypyrrole

Effect of Wall Boundary Layer Thickness on Power Performance of a Recirculation Microbial Fuel Cell

Heterotrophic Anodic Denitrification in Microbial Fuel Cells

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