Capacitive-faradaic fuel cells (CFFCs) for ion separation: Macro-scale configurations and polarization mechanism

Fabrication of the macro and micro-scale microbial fuel cells to monitor oxalate biodegradation in human urine

Scientific Reports ◽

10.1038/s41598-021-93844-y ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Reyhaneh Yousefi ◽

Mohammad Mahdi Mardanpour ◽

Soheila Yaghmaei

Keyword(s):

Fuel Cells ◽

Microbial Fuel Cells ◽

Coulombic Efficiency ◽

Open Circuit ◽

Sample Collection ◽

Online Data ◽

Implantable Medical Devices ◽

Micro Scale ◽

Macro Scale ◽

First Time

AbstractThis study presented the fabrication of macro and micro-scale microbial fuel cells (MFCs) to generate bioelectricity from oxalate solution and monitor the biodegradation in a micro-scale MFC for the first time. The maximum generated power density of 44.16 W m−3 in the micro-scale MFC elucidated its application as a micro-sized power generator for implantable medical devices (IMDs). It is also worthwhile noting that for the macro-scale MFC, the significant amounts of open circuit voltage, oxalate removal, and coulombic efficiency were about 935 mV, 99%, and 44.2%, respectively. These values compared to previously published studies indicate successful oxalate biodegradation in the macro-scale MFC. Regarding critical challenges to determine the substrate concentration in microfluidic outlets, sample collection in a suitable time and online data reporting, an analogy was made between macro and micro-scale MFCs to elicit correlations defining the output current density as the inlet and the outlet oxalate concentration. Another use of the system as an IMD is to be a platform to identify urolithiasis and hyperoxaluria diseases. As a versatile device for power generation and oxalate biodegradation monitoring, the use of facile and cheap materials (< $1.5 per device) and utilization of human excreta are exceptional features of the manufactured micro-scale MFC.

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Pore- and macro-scale simulations of high temperature proton exchange fuel cells – HTPEMFC – and possible strategies for enhancing durability

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2017.09.011 ◽

2017 ◽

Vol 42 (43) ◽

pp. 26730-26743 ◽

Cited By ~ 3

Author(s):

Uktam R. Salomov ◽

Eliodoro Chiavazzo ◽

Matteo Fasano ◽

Pietro Asinari

Keyword(s):

Fuel Cells ◽

High Temperature ◽

Proton Exchange ◽

Macro Scale

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Tailoring microstructures of materials through biomimetics

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100148332 ◽

1993 ◽

Vol 51 ◽

pp. 500-501

Author(s):

Mehmet Sarikaya ◽

Ilhan A. Aksay

Keyword(s):

Chemical Properties ◽

Design And Synthesis ◽

Structure Sensitive ◽

Macro Scale ◽

Methods Of Synthesis ◽

Successive Level ◽

Engineering Materials ◽

Physical And Chemical ◽

And Chemical Properties ◽

Synthesis Of Materials

Biomimetics involves investigation of structure, function, and methods of synthesis of biological composite materials. The goal is to apply this information to the design and synthesis of materials for engineering applications.Properties of engineering materials are structure sensitive through the whole spectrum of dimensions from nanometer to macro scale. The goal in designing and processing of technological materials, therefore, is to control microstructural evolution at each of these dimensions so as to achieve predictable physical and chemical properties. Control at each successive level of dimension, however, is a major challenge as is the retention of integrity between successive levels. Engineering materials are rarely fabricated to achieve more than a few of the desired properties and the synthesis techniques usually involve high temperature or low pressure conditions that are energy inefficient and environmentally damaging.In contrast to human-made materials, organisms synthesize composites whose intricate structures are more controlled at each scale and hierarchical order.

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