Thin film temperature sensor for real-time measurement of electrolyte temperature in a polymer electrolyte fuel cell |
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Affiliation: | 1. Department of PG Studies and Research in Physics, Government Science College, Chitradurga 577 501, Karnataka, India;2. Faculty of Engineering and Technology (ITER), Siskha ‘O’ Anusandhan (Deemed to be University), Bhubaneswar 751 030, Odisha, India;3. Department of Electronic Engineering, Institute for Wearable Convergence Electronics, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin 17104, Republic of Korea;4. Department of Electrical and Electronics Engineering Science, University of Johannesburg, Auckland Park Campus, PO Box 524, Johannesburg 2006, South Africa;5. Amity Institute of Nanotechnology, J-2 Block, Amity University, Sector-125, Noida 201303, NCR, India;6. Department of Physics, SJM College of Arts, Science and Commerce, Chitradurga 577 501, Karnataka, India |
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Abstract: | This paper describes a technique for the measurement of the electrolyte temperature in an operating polymer electrolyte fuel cell (PEFC). A patterned thin film gold thermistor embedded in a 16 μm thick parylene film was laminated in the Nafion® electrolyte layer for in situ temperature measurements. Experimental results show that the sensor has a linear response of (3.03 ± 0.09) × 10−3 °C−1 in the 20–100 °C temperature range and is robust enough to withstand the electrolyte expansion forces that occur during water uptake. An electrolyte temperature increase of 1.5 °C was observed in real-time when operating the fuel cell at 0.2 V and a current density of 0.19 A/cm2. The temperature sensitivity of the present sensor is in an order of magnitude better than the conventional micro-thermocouples that have been reported. Additionally, use of micro-fabrication techniques allows for an accurate placement of the temperature sensor within the fuel cell. Simulation results show that the sensor has no significant effect on the local temperature distribution. |
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