A 位缺陷钙钛矿在低温固体氧化物燃料电池中提供高活性和稳定性。
An A-site-deficient perovskite offers high activity and stability for low-temperature solid-oxide fuel cells.
机构信息
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry & Chemical Engineering, Nanjing University of Technology, No. 5 Xin Mofan Road, Nanjing 210009 (PR China).
出版信息
ChemSusChem. 2013 Dec;6(12):2249-54. doi: 10.1002/cssc.201300694. Epub 2013 Oct 23.
Solid oxide fuel cells (SOFCs) directly convert fossil and/or renewable fuels into electricity and/or high-quality heat in an environmentally friendly way. However, high operating temperatures result in high cost and material issues, which have limited the commercialization of SOFCs. To lower their operating temperatures, highly active and stable cathodes are required to maintain a reasonable power output. Here, we report a layer-structured A-site deficient perovskite Sr0.95 Nb0.1 Co0.9 O3-δ (SNC0.95) prepared by solid-state reactions that shows not only high activity towards the oxygen reduction reaction (ORR) at operating temperatures below 600 °C, but also offers excellent structural stability and compatibility, and improved CO2 resistivity. An anode-supported fuel cell with SNC0.95 cathode delivers a peak power density as high as 1016 mW cm(-2) with an electrode-area-specific resistance of 0.052 Ω cm(2) at 500 °C.
固体氧化物燃料电池（SOFCs）以环保的方式直接将化石和/或可再生燃料转化为电能和/或高质量热能。然而，高工作温度导致成本高和材料问题，这限制了 SOFC 的商业化。为了降低工作温度，需要高活性和稳定的阴极来维持合理的功率输出。在这里，我们报告了一种通过固态反应制备的具有层状结构的 A 位缺陷钙钛矿 Sr0.95 Nb0.1 Co0.9 O3-δ（SNC0.95），它不仅在低于 600°C 的工作温度下对氧还原反应（ORR）具有高活性，而且还具有优异的结构稳定性和相容性，以及提高的 CO2 电阻率。采用 SNC0.95 作为阴极的阳极支撑型燃料电池在 500°C 时可提供高达 1016 mW cm(-2)的峰值功率密度，电极面积比电阻为 0.052 Ω cm(2)。
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