Stainless steels in bipolar plates - Surface resistive properties of corrosion resistant steel grades during current loads
Stainless steels in bipolar plates - Surface resistive properties of corrosion resistant steel grades during current loads
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DOI：
10.1016/j.corsci.2005.05.012
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发表时间：
2006-05-01
影响因子：
8.3
通讯作者：
Iversen, A. K.
中科院分区：
文献类型：
--
作者：
Iversen, A. K.
质子交换膜燃料电池的汽车开发商报告了不锈钢表面接触电阻增加导致燃料电池效率下降的实例，他们在双极板中使用了AISI316L等级(EN 1.4404)。为了找出原因，使用循环电流密度负载测量了一些不锈钢牌号的表面电阻特性。电化学阻抗谱(EIS)被用作测量电流密度加载前后的电阻特性的工具。此外，在最稳定和耐腐蚀的不锈钢之一904L上施加了高的连续恒流电流密度，以评估钝化膜由于温度、电流或两者的组合而产生的任何导电变化。(C)2005爱思唯尔有限公司。保留所有权利。
Instances of an increase in the contact resistance of stainless steel surfaces, resulting a decrease in the efficiency of fuel cells, were reported by automotive developers of PEM fuel cells, who had used the AISI 316L grade (EN 1.4404) in bipolar plates. To identify the reason for this, surface resistive properties were measured for a number of stainless steel grades, using cyclic current density loads. Electrochemical impedance spectroscopy (EIS) was used as a tool for these measurements of the resistive properties before and after the current density loads. In addition, a high continuous galvanostatic current density was imposed on one of the most stable and corrosion resistant stainless steel grades, 904L, to evaluate any conductive changes of the passive film due to temperature, current or a combination of the two. (c) 2005 Elsevier Ltd. All rights reserved.