Automated pencil electrode formation platform to realize uniform and reproducible graphite electrodes on paper for microfluidic fuel cells.

Scientific Reports
Lanka Tata RaoSanket Goel

Abstract

Graphite pencil stroked electrodes for paper-based Microfluidic devices are gaining immense attention due to their electrochemical properties, cost efficiency, and ease-of-use. However, their widespread use has been hindered by the challenges associated with their manual fabrication such as non-uniformity in graphite deposition, applied pressure, etc. This work presents the design and development of an automated graphite pencil stroking device for graphite electrode fabrication with high efficiency through a compact, inexpensive and automatic process, with reduced fabrication time and human intervention leading to more uniformity. The motion platform of Graphtec plotter was used to create multiple strokes with the help of the proposed device. Such inexpensive graphite electrodes (less than the US $1) have been observed to be porous in nature, acting as diffusion agents. The automated graphite electrodes were used to study the performance of microfluidic paper fuel cells (MPFCs) with formic acid, oxygen, and sulphuric acid acting as fuel, oxidising agent and electrolyte respectively. From this configuration, the maximum current density and power density were measured to be 1,305.5 µA cm-2 and 135.5 µW cm-2, respectively at 0.3 V...Continue Reading

References

Nov 6, 2012·Angewandte Chemie·Zhong Lin Wang, Wenzhuo Wu
May 23, 2015·Lab on a Chip·Ramya VeerubhotlaSuman Chakraborty
Mar 4, 2017·Journal of Analytical Methods in Chemistry·Iulia Gabriela DavidMihaela Buleandra
Feb 5, 2019·IEEE Transactions on Nanobioscience·Madhavi BandapatiSanket Goel

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Methods Mentioned

BETA
scanning electron microscopy
X-ray

Software Mentioned

Matlab
Graphtec studio ( GS
AutoCAD
graphtec plotter
SolidWorks
Arduino Uno
graphtec studio
Graphtec studio ( GS )
Uniq
Graphtec

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