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首页> 外文会议>International Conference on Advanced Ceramics and Composites >STABILITY TESTING BEYOND 1000 HOURS OF SOLID OXIDE CELLS UNDER STEAM ELECTROLYSIS OPERATION
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STABILITY TESTING BEYOND 1000 HOURS OF SOLID OXIDE CELLS UNDER STEAM ELECTROLYSIS OPERATION

机译：在蒸汽电解操作下稳定性测试超过1000小时的固体氧化物细胞

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Long-term operation of electrolyte supported solid oxide cells in the steam-electrolyser mode is reported. The cells consisted of scandia/ceria doped zirconia electrolytes with two different doping densities (lOSclCeSZ and 6SclCeSZ), CGO diffusion-barrier layers, lanthanum strontium cobaltite ferrite (LSCF) oxygen electrodes, and nickel steam/hydrogen electrodes. Operation times were 2700 and 2500 hours with a current density of j= -0.5 A cm~(-2), and 1460 h with j = -0.7 A cm~(-2). Cell voltages of 1.0 to 1.13 V were obtained under a steam conversion rate of 40 % and cell temperatures of 830 to 843°C . Voltage degradation was below 0.6 %/1000 h (<8 mV/1000 h) in the tests withy j= -0.5 A cm~(-2), and below 0.9 %/1000 h (<11 mV/1000 h) for j = -0.7 A cm~(-2). These values are comparable to the lowest ones measured at state-of-the-art hydrogen electrode supported cells, they extrapolate to a practical operation time of several years. Impedance spectroscopy was applied as in-situ tool (i.e. without interrupting the steady-state DC current flow) for degradation analysis. Degradation was found to be due to the increase in the ohmic resistance. No electrode degradation could be detected.
机译：报道了电解质支持的电解质中的长期操作蒸汽电解槽模式中的固体氧化物细胞。该细胞由甜钪/二氧化铈掺杂氧化锆电解质，具有两种不同的掺杂密度（Losclcez和6sclcez），CgO扩散阻挡层，镧锶钴石铁氧体（LSCF）氧电极和镍蒸汽/氢电极。操作时间为2700和2500小时，电流密度为j = -0.5厘米〜（-2），1460小时，j = -0.7a cm〜（-2）。在830至843℃的40％和细胞温度的蒸汽转化率下获得1.0至1.13V的电池电压。在测试中，电压劣化低于0.6％/ 1000小时（<8mV / 1000h），j = -0.5厘米〜（-2），低于0.9％/ 1000小时（<11 mV / 1000小时） = -0.7 a cm〜（-2）。这些值与在最先进的氢电极支撑的电池中测量的值相当，它们将外推到几年的实际操作时间。阻抗光谱作为原位工具（即不中断稳态DC电流流量）以进行降解分析。发现降解是由于欧姆抗性的增加。可以检测到电极劣化。

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