Proton conducting tungsten phosphate glass and its application in intermediate temperature fuel cells
Proton conducting tungsten phosphate glass and its application in intermediate temperature fuel cells
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DOI：
10.1016/j.ssi.2013.10.055
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发表时间：
2014-09-01
影响因子：
3.2
通讯作者：
Omata, T.
中科院分区：
文献类型：
--
作者：
Ishiyama, T.;Suzuki, S.;Omata, T.
通过在345 ℃下用质子电化学取代钠离子，将高浓度的质子载体（5.0 × 10（21）cm（-3））注入到磷酸钨玻璃（8 WO（3）-35NaO（1/2）-8NbO（5/2）-5LaO（3/2）-44PO（5/2））中。使用该取代玻璃作为固体电解质的氢浓差电池的电动势表明，在300 ℃下，玻璃中质子和电子的混合传导的平均质子传输数为0.8。质子的部分电导率为8.0 × 10（-4）Scm（-1）。燃料电池产生的最大功率密度为1.3 mWcm（-2），即使它的开路电压只有0.77 V，因为电子的导电性的贡献。讨论了提高质子传导率以改善燃料电池性能的方法。(C)2013爱思唯尔有限公司版权所有。
High concentrations of proton carriers (5.0 x 10(21) cm(-3)) were injected into tungsten phosphate glass (8WO(3)-35NaO(1/2)-8NbO(5/2)-5LaO(3/2)-44PO(5/2)) by electrochemical substitution of sodium ions with protons at 345 degrees C. The electromotive force of a hydrogen concentration cell that used the substituted glass as a solid electrolyte indicated a mixed conduction of protons and electrons in the glass with a mean proton transport number of 0.8 at 300 degrees C The partial conductivity of,the protons was 8.0 x 10(-4) Scm(-1). The fuel cell generated electricity at a maximum power density of 1.3 mWcm(-2), even though its open circuit voltage was only 0.77 V because of the electronic contribution to the conductivity. Methods to increase the proton conductivity for improving fuel cell performance are discussed. (C) 2013 Elsevier B.V. All rights reserved.