Enhanced performance of solid oxide fuel cell fabricated by a replica technique combined with infiltrating process
Enhanced performance of solid oxide fuel cell fabricated by a replica technique combined with infiltrating process
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DOI：
10.1016/j.ijhydene.2014.06.123
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发表时间：
2014-08
影响因子：
7.2
通讯作者：
Da Han;Yadi Liu;Shaorong Wang;Z. Zhan
中科院分区：
文献类型：
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作者：
Da Han;Yadi Liu;Shaorong Wang;Z. Zhan
为了便于密封，本研究首次成功发明了采用碳层制备“多孔La0.9Sr0.1Ga0.8Mg0.2O3(LSGM) |致密LSGM|多孔LSGM”骨架的非对称三层结构。SEM分析表明，采用该方法可以提高致密型和多孔型合金的界面接触强度。然后将金属Ni和层状钙钛矿氧化物SmBa0.5Sr0.5Co2O5（SBSCO）渗透到两侧不对称的骨架中，形成功能性燃料电池。OCV接近预期能势，表明本研究制备的电池具有良好的密封性能。“Ni-LSGM |LSGM| LSGM - sbsco”结构的功能燃料电池在400、450、500、550℃时的最大功率密度分别为0.12 W cm−2、0.38 W cm−2、1 W cm−2和1.8 W cm−2。虽然长期稳定性测试表明，在0.7 V下放电80 h时，性能会迅速下降，但通过将纯Ni变为Ni - sdc混合氧化物，“Ni - sdc - LSGM| LSGM| LSGM - sbsco”结构的功能燃料电池性能得到提高，长期稳定性得到很大改善。
For the convenience of hermetic sealing, first time, a replica technique is successfully invented in this study to fabricate the dissymmetrical tri-layer structure of “porous La0.9Sr0.1Ga0.8Mg0.2O3(LSGM) |dense LSGM| porous LSGM” skeleton by adopting a carbon layer. SEM analysis reveals that the bonding strength of interfacial contact between dense LSGM and porous LSGM can also be improved when using this new fabrication method. Metal Ni and layered perovskite oxide SmBa0.5Sr0.5Co2O5(SBSCO) are then infiltrated into the dissymmetrical skeleton on each side to form the functional fuel cell. The OCV are close to the expected Nernst potentials which demonstrate that the cell fabricated in this study can be well sealed. The maximum power densities of functional fuel cell with configuration of “Ni–LSGM |LSGM| LSGM–SBSCO” are 0.12 W cm−2, 0.38 W cm−2, 1 W cm−2and 1.8 W cm−2at 400, 450, 500, 550 °C, respectively. Though long term stability testing shows a rapid performance degradation when discharged at 0.7 V for 80 h, by changing pure Ni to Ni–SDC mixed oxide, the performance of functional fuel cell with configuration of “Ni–SDC–LSGM |LSGM| LSGM–SBSCO” increases and the long term stability is largely improved.