From macro- to micro-single chamber solid oxide fuel cells
From macro- to micro-single chamber solid oxide fuel cells
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DOI：
10.1016/j.jpowsour.2007.06.204
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发表时间：
2007-09-27
影响因子：
9.2
通讯作者：
Gauckler, L. J.
中科院分区：
文献类型：
--
作者：
Buergler, B. E.;Ochsner, M.;Gauckler, L. J.
制备了具有交错电极的单室固体氧化物燃料电池（SC-SOFCs），并在CH4/空气混合物中工作。两个电极（Ni-Ce0.8Gd0.2O1.9金属陶瓷和sm0.5 sr0.5 o3 - δ钙钛矿）被放置在Ce0.8Gd0.1O1.95电解液圆盘的同一侧。电极之间的分离间隙从1.2到0.27 mm不等，最后降至10 μ m。制备间隙在毫米范围内的细胞采用丝网印刷，而制备微型sc - sofc则采用毛细管微成型（MIMIC）。制备的微sc - sofc由49个独立细胞组成的阵列组成，这些细胞以100 μ m宽的电极并联连接。在流动的甲烷和空气混合物中测量了0.65-0.75 V的开路电压。17mw cm（-2）的最大功率密度受到沿薄电极到单个电池活性部位的长传导路径的欧姆电阻的限制。通过将微电池的性能与特征尺寸在毫米范围内的电池的性能进行比较，证明了微电池的可行性。在相邻电池的阳极和阴极之间进行串联，可以显著降低微型sc - sofc的电池电阻。(C) 2007 Elsevier B.V.版权所有
Single chamber solid oxide fuel cells (SC-SOFCs) with interdigitating electrodes were prepared and operated in CH4/air mixtures. Both electrodes (Ni-Ce0.8Gd0.2O1.9 cermet and Sm0.5Sr0.5O3-delta perovskite) were placed on the same side of a Ce0.8Gd0.1O1.95 electrolyte disc. The separating gap between the electrodes was varied from 1.2 to 0.27 mm and finally down to 10 mu m. Screen-printing was used for the preparation of the cells with a gap in the millimetre range, whereas micromolding in capillaries (MIMIC) was used for the preparation of the micro-SC-SOFCs.The prepared micro-SC-SOFCs consisted of an array of 49 individual cells that were connected in parallel having 100 mu m wide electrodes. An open circuit voltage of 0.65-0.75 V was measured in flowing mixtures of methane and air. The maximum power density of 17 mW cm(-2) was limited by the ohmic resistance of the long conduction paths along the thin electrodes to the active sites of the individual cells. The feasibility of the micro-cell was demonstrated by comparing the performance with the performance of the cells having feature sizes in the millimetre range. The cell resistance of micro-SC-SOFCs may be significantly reduced when connecting the cells in series using interconnections between anode and cathodes of adjacent cells. (C) 2007 Elsevier B.V. All rights reserved.