Performance of a linear array solid oxide fuel cell micro-stack operated in single-chamber conditions
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ORIGINAL PAPER
Performance of a linear array solid oxide fuel cell micro-stack operated in single-chamber conditions Yanting Tian 1 & Pingping Wu 1 & Xu Zhang 1 & Xiang Guo 1 & Lili Ding 1 Received: 2 August 2020 / Revised: 6 September 2020 / Accepted: 9 September 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract A single-chamber solid oxide fuel cell micro-stack with a linear array arrangement has been particularly investigated in methaneoxygen-argon mixture. The stack with four cells connected in series exhibited an open-circuit voltage of 3.7 V and a maximum power output of 353 mW (total active area: 2 cm2) at 700 °C. The performance of the cells was gradually reduced along with the gas flow direction at Ar flow rate of 140 sccm and the performance difference between the cells was decreased with the increasing gas flow rate. Results showed that a CH4/O2 ratio of 1 was the most favorable ratio for the downstream cells. The power output of the linear stack at Ar flow rate of 140 sccm was 50% higher than that of the previous stack with equal inlet gas for each single cell, which proved an advantage for the linear array arrangement at low gas flow rate not only for fuel economy but also for a better stack performance. Keywords Single-chamber solid oxide fuel cell . Linear array micro-stack . CH4/O2 ratio . Gas flow rate
Introduction Currently, the worldwide energy crisis and environment deterioration are the major issues for the development of human society. The exploitation and utilization of renewable energy have become an important task for sustainable development. As an energy conversion device, solid oxide fuel cell (SOFC) has received growing attentions because of the advantages such as high energy conversion efficiency, wide fuel adaptability, all-solid components, and environmental friendliness [1–5]. Single-chamber solid oxide fuel cell (SC-SOFC), where both the anode and cathode are operated in the same gas chamber, is considered to be a potential micro-power generator [6]. SC-SOFC is more shock-resistant by removing the sealing processes, both thermally and mechanically, and hence a rapid start-up and compact stack design for miniaturization over the traditional fuel cell configuration [7–9]. As the Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11581-020-03780-6) contains supplementary material, which is available to authorized users. * Yanting Tian [email protected] 1
College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China
cathode and anode of the SC-SOFC are flushed by a uniform gas mixture, the cell performance depends primarily on the selective catalysis of the electrodes [10–13]. The anode is aimed at catalyzing the partial oxidation of hydrocarbon and the cathode the reduction of oxygen. A differential of oxygen partial pressure between the electrodes is thus created to establish an electromotive force that drives the fuel cell operation [14]. In view of the sealing-free structure
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