Vertically Grown Multiwalled Carbon Nanotube Anode and Nickel Silicide Integrated High Performance Microsized (1.25 μL) Microbial Fuel Cell

Mink, Justine E.; Rojas, Jhonathan Prieto; Logan, Bruce E.; Hussain, Muhammad Mustafa

doi:10.1021/nl203801h

Cited by 131 publications

(87 citation statements)

References 36 publications

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“…Synthesis and design of new electrode materials, purposely built with bioelectrochemical applications in mind is only very recent. 6,[11][12][13][14][15][16][17][18][19][20][21] The classical approach in research on prospective electrode materials aims at increasing the active surface area available for biofilm growth. On the other hand, another strategy aims at designing materials with specific properties that will improve the bacteria-electrode interaction, especially the rate of electron transfer, to enhance the activity of the biofilms.…”

Section: Introductionmentioning

confidence: 99%

The nanostructure of three-dimensional scaffolds enhances the current density of microbial bioelectrochemical systems

Flexer

Chen

Donose

et al. 2013

Energy Environ. Sci.

134

118

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Bioelectrochemical systems encompass a range of electrochemical systems wherein microorganisms are used as biocatalysts. These range from classical microbial fuel cells to novel microbial electrosynthesis processes. The future of practical applications relies on increased performance. In all cases the development of new electrode materials is essential to overcome the low current densities of bioelectrochemical systems. Here we describe a new biocompatible, highly conductive three-dimensional scaffold electrode, NanoWeb-RVC, with a hierarchical porous structure, synthesized by direct growth of carbon nanotubes on a macroporous substrate. The nanostructure of these electrodes enhances the rate of bacterial extracellular electron transfer while the macrostructure ensures efficient mass transfer to and from the electrode surface. NanoWeb-RVC electrodes showed a current density of (6.8 ± 0.3) mA cm-2, almost three times higher than a control electrode with the same macroporous structure but lacking the nanostructure. This current density is among the highest reported to date for a microbial bioanode. to overcome the low current densities of bioelectrochemical systems. Here we describe a new biocompatible, highly conductive three-dimensional scaffold electrode, NanoWeb-RVC, with a hierarchical porous structure, synthetised by direct growth of carbon nanotubes on a macroporous substrate. The nanostructure of these electrodes enhances the rate of bacterial extracellular electron transfer while the macrostructure ensures efficient mass transfer to and from the electrode surface. NanoWeb-RVC electrodes showed a current density of (6.8 ± 0.3) mA cm -2 , almost three times higher than a control electrode with the same macroporous structure but lacking the nanostructure. This current density is among the highest reported to date for a microbial bioanode.

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Section: Introductionmentioning

confidence: 99%

The nanostructure of three-dimensional scaffolds enhances the current density of microbial bioelectrochemical systems

Flexer

Chen

Donose

et al. 2013

Energy Environ. Sci.

134

118

View full text Add to dashboard Cite

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“…8 Due to the exceptional electrical and structural properties of nano-engineered carbon materials, such as carbon nanotubes (CNTs) and, most recently, graphene oxides, studies have incorporated these materials into MFC anodes. 7,[9][10][11][12] The specific surface areas of CNTs and the two-dimensional atomic crystal-structured material graphene are at least three orders of magnitude (10 3 ) higher than that of conventional carbon-based electrodes (o1 m 2 g À1 ). Furthermore, these materials have intrinsic high electrical conductivities (410 S cm À1 ), potentially making them ideal anode materials to enhance power densities.…”

Section: Multi-layer Graphene Anodementioning

confidence: 99%

“…11 In our previous work, we used multi-walled CNTs as an anode to produce high current density MFCs. 12 Recently, graphene oxide has also been introduced as a blended anode material in carbon cloth [14][15][16] and stainless steel. 17 We show here, for the first time in any type of MFC, that anodes can be composed of pure multi-layer graphene rather than a graphene oxide hybrid.…”

Section: Multi-layer Graphene Anodementioning

confidence: 99%

Energy harvesting from organic liquids in micro-sized microbial fuel cells

et al. 2014

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Micro-sized microbial fuel cells (MFCs) are miniature energy harvesters that use bacteria to convert biomass from liquids into usable power. The key challenge is transitioning laboratory test beds into devices capable of producing high power using readily available fuel sources. Here, we present a pragmatic step toward advancing MFC applications through the fabrication of a uniquely mobile and inexpensive micro-sized device that can be fueled with human saliva. The 25-ll MFC was fabricated with graphene, a two-dimensional atomic crystal-structured material, as an anode for efficient current generation and with an air cathode for enabling the use of the oxygen present in air, making its operation completely mobile and free of the need for laboratory chemicals. With saliva as a fuel, the device produced higher current densities (1190 A m À3 ) than any previous aircathode micro-sized MFCs. The use of the graphene anode generated 40 times more power than that possible using a carbon cloth anode. Additional tests were performed using acetate, a conventional organic material, at high organic loadings that were comparable to those in saliva, and the results demonstrated a linear relationship between the organic loading and current. These findings open the door to saliva-powered applications of this fuel cell technology for Lab-on-a-Chip devices or portable point-of-care diagnostic devices.

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“…Processing of magnetic nanostructures is currently crucial in the field of magnetic engineering, such as for magnetic hyperthermia [1], drug delivery systems [2], environmental purification [3], and magnetic recording systems [4]. For instance, with respect to magnetic recording systems, the immediate development of ultrahigh density magnetic recording media is indispensable because of the explosive worldwide increase in digital information.…”

Section: Introductionmentioning

confidence: 99%

“…Hexagonal structural ferrite, SrFe 12 O 19 , is known to exhibit a large anisotropy constant (K 1 ) value of 3.5×10 6 erg/cm 3 [8] and is widely used as a ferrite magnet. SrFe 12 O 19 also shows sufficient chemical stability, corrosion resistance, and superior wear resistance; these characteristics make SrFe 12 O 19 suitable for use in functional magnetic nanoparticles.…”

Section: Introductionmentioning

confidence: 99%