Effects of pressure modulation on porous gas electrodes

机译：压力调制对多孔气体电极的影响

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We explore experimentally the coupling between cell voltages at constant current and pressure differentials applied at the gas/electrolyte compartments of a reversible alkaline fuel cell and an electrolyzer system. In the fuel cell mode, higher pressure on the gas side improves the efficiency until gas bubbles evolve into the electrolyte; instead, above a well defined value of overpressure on the electrolyte, the fuel cell voltage drops to zero, as expected. In the electrolyzer mode, an overpressure on the electrolyte decreases the power requirements, mostly due a drop in the overpotential of the H_2 electrode. The response of anode and cathode voltages to pressure step consists of a "fast" component and slow "training" or relaxation effects.

机译：我们实验性地研究了恒定电流下的电池电压与可逆碱性燃料电池和电解系统的气体/电解质隔室所施加的压差之间的耦合。在燃料电池模式下，气体侧的较高压力会提高效率，直到气泡演变成电解质为止；相反，在电解质上的超压的明确定义值之上，燃料电池电压会按预期下降到零。在电解模式下，电解质上的超压会降低功率要求，这主要是由于H_2电极的超电势下降所致。阳极和阴极电压对压力阶跃的响应包括“快速”分量和缓慢的“训练”或松弛效应。

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《Electrochemical Society(ECS) Meeting;Symposium on Electrochemistry of Novel Electrode Materials for Energy Conversion and Storage; 20070506-11;20070506-11; Chicago,IL(US);Chicago,IL(US)》|2007年|P.351359|共2页
会议地点 ChicagoIL(US);ChicagoIL(US)
作者
M. Villa; M. Lorenzi; P. Nelli; H-J Kohnke; G. Zangari;
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作者单位

Dipartimento Progettazione e Tecnologie, Universita di Bergamo, Viale Marconi 5, 22044 Dalmine, Italy;

Gaskatel GmbH, Hollaendische Str. 195, Kassel, Germany;

Department of Materials Science and Engineering, University of Virginia, Charlottesville, VA 2290;

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Effects of pressure modulation on porous gas electrodes

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