Parametric Performance Investigation on Membraneless Microfluidic Paper Fuel Cell with Graphite Composed Pencil Stoke El
- PDF / 1,603,637 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 69 Downloads / 167 Views
International Journal of Precision Engineering and Manufacturing https://doi.org/10.1007/s12541-020-00444-3
REGULAR PAPER
Parametric Performance Investigation on Membraneless Microfluidic Paper Fuel Cell with Graphite Composed Pencil Stoke Electrodes Lanka Tata Rao1,3 · Satish Kumar Dubey1,3 · Arshad Javed1,3 · Sanket Goel2,3 Received: 25 April 2020 / Revised: 21 October 2020 / Accepted: 16 November 2020 © Korean Society for Precision Engineering 2020
Abstract Membraneless Microfluidic Paper Fuel Cells (MMPFCs) are promising devices to harvest energy for various portable applications. This is primarily because such devices eliminate the need for membrane, and external pumps due to the builtin co-laminar flow, and embedded capillaries, respectively. However, these devices have enormous scope to optimize their performance. Herein, investigations on MMPFC have been carried out with varying electrode separation, whereby cellulose papers acts as the microchannel of MMPFC. Here, various grades of carbon-supported graphite pencils serve as electrodes, formic acid acts as a fuel, and sulphuric acid works as an electrolyte. Oxygen from the atmospheric air acts as an oxidant for ionic exchange under co-laminar flow in the MMPFC. These MMPFCs with the optimized configuration provide enhanced energy densities with different grades of the microchannel material along with variation in electrode separation. Leveraging grade 1 Whatman cellulose paper as MMPFC microchannel with 1 mm electrode separation, the MMPFC generates energy with a maximum open-circuit potential of 0.49 V, a maximum current density of 2.45 mAcm−2 and power density of 0.26 mWcm−2. Keywords Membraneless microfluidics fuel cell · Whatman cellulose paper · Electrode separation · Graphite pencil strokes electrodes · Electrochemistry
1 Introduction Membraneless microfluidic paper fuel cells (MMPFCs) are utilized to yield energy with high efficiency through the chemical reaction of fuels by a continuous supply of fuels with an external agent. Recently, papers substrate-based microfluidic fuel cells are utilized for various portable power applications with a capillary mechanism, without any external driving periphery. These paper based cells are capable to fulfil the power requirements of portable devices such as POC (point-of-care) and POS (point-of-source) devices. Also, in several other applications such as biomedical sensing, toxicity detection, defence, and one-time-usage devices, * Sanket Goel [email protected]‑pilani.ac.in; [email protected] 1
Department of Mechanical Engineering, BITS Pilani, Hyderabad Campus, Hyderabad 500078, India
2
Department of Electrical & Electronics Engineering, BITS Pilani, Hyderabad Campus, Hyderabad 500078, India
3
MEMS, Microfluidics and Nanoelectronics Lab, BITS Pilani, Hyderabad Campus, Hyderabad 500078, India
the paper based fuel cells can be utilized. However, the necessity for external peripherals, like values and pumps, severely restricts their movability and miniaturization [1, 2]. Further, these
Data Loading...
