Electrochemical Approach for Analyzing Electrolyte Transport Properties and Their Effect on Protonic Ceramic Fuel Cell Performance

被引:45
|
作者
Danilov, Nikolay [1 ,2 ]
Lyagaeva, Julia [1 ,2 ]
Vdovin, Gennady [1 ]
Medyedev, Dmitry [1 ,2 ]
Demin, Anatoly [1 ,2 ]
Tsiakaras, Panagiotis [1 ,2 ,3 ]
机构
[1] Inst High Temp Electrochem, Lab Electrochem Devices Based Solid Oxide Proton, Ekaterinburg 620137, Russia
[2] Ural Fed Univ, Ekaterinburg 620002, Russia
[3] Univ Thessaly, Dept Mech Engn, Sch Engn, Lab Alternat Energy Convers Syst, Volos 38334, Greece
基金
俄罗斯科学基金会;
关键词
solid oxide fuel cells; current interruption method; electromotive force measurements; protonic conductors; ohmic and polarization resistances; DOPED BARIUM ZIRCONATE; NUMBER DETERMINATION; CURRENT LEAKAGE; CATHODE; ANODE; PEROVSKITE; MEMBRANE; CONDUCTIVITY; POLARIZATION; GENERATION;
D O I
10.1021/acsami.7b07472
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The design and development of highly conductive materials with wide electrolytic domain boundaries are among the most promising means of enabling solid oxide fuel cells (SOFCs) to demonstrate outstanding performance across low- and intermediate-temperature ranges. While reducing the thickness of the electrolyte is an extensively studied means for diminishing the total resistance of SOFCs, approaches involving an improvement in the transport behavior of the electrolyte membranes have been less-investigated. In the present work, a strategy for analyzing the electrolyte properties and their effect on SOFC output characteristics is proposed. To this purpose, a SOFC based on a recently developed BaCe(0.5)Zro(0.3)Dy(0.2)O(3-delta) proton-conducting ceramic material was fabricated and tested. The basis of the strategy consists of the use of traditional SOFC testing techniques combined with the current interruption method and electromotive force measurements with a modified polarization-correction assessment. This allows one to determine simultaneously such important parameters as maximal power density; ohmic and polarizationresistances; average ion transport numbers; and total, ionic, and electronic film conductivities and their activation energies. The proposed experimental procedure is expected to expand both fundamental and applied basics that could be further adopted to improve the technology of electrochemical devices based on proton-conducting electrolytes.
引用
收藏
页码:26874 / 26884
页数:11
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