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In-situ temperature monitoring directly from cathode surface of an operating solid oxide fuel cell

Show simple item record Guk, E Ranaweera, M Venkatesan, V Kim, JK Jung, WC 2023-03-17T09:01:37Z 2023-03-17T09:01:37Z 2020
dc.identifier.citation Guk, E., Ranaweera, M., Venkatesan, V., Kim, J.-S., & Jung, W. (2020). In-situ temperature monitoring directly from cathode surface of an operating solid oxide fuel cell. Applied Energy, 280, 116013. en_US
dc.description.abstract The electrode temperature distribution of a solid oxide fuel cell is an important parameter to consider for gaining better insight into the cell performance and its temperature-related degradations. The present efforts of measuring gas channel temperatures do not accurately reveal the cell surface temperature distribution. Therefore, the authors propose a cell-integrated multi-junction thermocouple array to measure the electrode temperature distribution from a working solid oxide fuel cell. In this work, the authors deposited a thin film/wire multi-channel thermal array on the cathode of a commercially-sourced solid oxide fuel cell. The temperature of the cell was measured under varying fuel compositions of hydrogen and nitrogen. The multi-channel array showed excellent temperature correlation with the fuel flow rate and with the cell’s performance whilst commercial thermocouples showed a very dull response (10 ~ 20 °C discrepancy between thermocouples and the multi-channel array). Furthermore, cell temperature measurements via the multi-channel array enabled detecting potential fuel crossover. This diagnostic approach is applied to a working solid oxide fuel cell, yielding insights into key degradation modes including gas-leakage induced temperature instability, its relation to the theoretical open circuit voltage and current output, and propagation of structural degradation. It is envisaged that the use of the multi-thermocouple array techniques could lead to significant improvements in the design of electrochemical energy devices, like fuel cells and batteries and their safety features, and other hard-to-reach devices such as inside an internal combustion engine or turbine blades. en_US
dc.language.iso en_US en_US
dc.publisher Elsevier en_US
dc.subject Solid oxide fuel cells en_US
dc.subject Cathode temperature of SOFC en_US
dc.subject Thin-film thermocouples en_US
dc.subject Multi-thermocouple array en_US
dc.subject Fuel flowrate-OCV relationship en_US
dc.title In-situ temperature monitoring directly from cathode surface of an operating solid oxide fuel cell en_US
dc.type Article-Full-text en_US
dc.identifier.year 2020 en_US
dc.identifier.journal Applied Energy en_US
dc.identifier.volume 280 en_US
dc.identifier.database ScienceDirect en_US
dc.identifier.pgnos 116013 en_US
dc.identifier.doi en_US

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