Operation of hydrogen–air fuel cells based on proton conducting oxides and hydrogen storage metals
Operation of hydrogen–air fuel cells based on proton conducting oxides and hydrogen storage metals
复制标题
基于质子传导氧化物和储氢金属的氢空气燃料电池的运行
DOI：
10.1016/s0925-8388(01)01514-6
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发表时间：
2002
影响因子：
6.2
通讯作者：
S. Ikeda
中科院分区：
文献类型：
--
作者：
S. Yamaguchi;H. Yugami;S. Ikeda
我们构建了一种以质子导电氧化物为电解液，以储氢金属为氢源的氢-空气燃料电池。利用储氢金属作为氢源，可以非常方便地对电解液和电极材料进行测试。我们测试了三种质子导电氧化物，即SrCe0.95Yb0.05O2.975，SrZr0.9Yb0.1O2.95和BaCe0.9Y0.1O2.95，以及两种负极材料，即石墨和镍浆。当燃料电池保持在特定温度附近时，燃料电池工作稳定，开路电压约为1.2V，在该温度下，从储氢金属中释放约0.1兆帕的氢气。在负载下，电流密度随质子导电氧化物的种类以及负极材料的不同而不同。电流密度随温度和电解液厚度的变化而变化。以BaCe0.9Y0.1O2.95和镍膏为基础的燃料电池具有最佳的电流密度-电压性能。电池的最大电流密度为700mV，31.6mA cm−2，电解液厚度为0.9 mm，温度为640℃。
We constructed a hydrogen–air fuel cell consisting of proton conducting oxides as an electrolyte and hydrogen storage metals as a hydrogen source. By using the hydrogen storage metals as the hydrogen source, we could test very easily both the electrolyte and the electrode materials. We tested three kinds of proton conducting oxides, i.e. SrCe0.95Yb0.05O2.975, SrZr0.9Yb0.1O2.95and BaCe0.9Y0.1O2.95as well as two kinds of the negative electrode materials, i.e. graphite and nickel pastes. The fuel cell operated stably giving open circuit voltages of about 1.2 V, when the cell was maintained near a specific temperature at which hydrogen gas of about 0.1 MPa was released from the hydrogen storage metal. Under load, current densities varied depending on the kind of proton conducting oxides as well as on the negative electrode materials. Also the current densities varied with temperature and the thickness of electrolyte. The best current density–voltage performance was obtained from the fuel cells based on BaCe0.9Y0.1O2.95and nickel paste. The highest current density at 700 mV, 31.6 mA cm−2, was delivered by a cell of 0.9 mm electrolyte thickness at 640°C.