Characterization of solid oxide fuel cells based on solid electrolytes or mixed ionic electronic conductors

被引：96

作者：

Riess, I ^{[1
]}

Godickemeier, M ^{[1
]}

Gauckler, LJ ^{[1
]}

机构：

[1] ETH ZURICH,CH-8092 ZURICH,SWITZERLAND

来源：

SOLID STATE IONICS | 1996年 / 90卷 / 1-4期

关键词：

solid oxide fuel cells; solid electrolytes; mixed ionic electronic conductors; four-probe measurements; overpotential;

D O I：

10.1016/S0167-2738(96)00355-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The relation between cell voltage (V-Cell), applied chemical potential difference (Delta mu(O-2)) and cell current (I-t) for solid oxide fuel cells (SOFC) based on mixed ionic electronic conductors is derived by considering also the effect of electrode impedance. Four-probe measurements, combined with current interruption analysis, are considered to yield the relation between ionic current (I-i) and overpotential (eta) The theoretical relations are used to analyze experiments on fuel cells with Ce0.8Sm0.2O1.9 and C0.8Gd0.2O1.9 electrolytes with La0.8Sr0.16CoO3 or Pt as the cathode and Ni/Ce0.9Ca0.1O1.9-x or Pt as the anode. The electrode overpotentials of these cells, determined by current interruption measurements, are discussed assuming different models including impeded mass transport in the gas phase for molecular and monoatomic oxygen and Butler-Volmer type charge transfer overpotential.

引用

页码：91 / 104

页数：14

共 19 条

[1] DIFFUSION-LIMITED CHARGE TRANSPORT AT PLATINUM-ELECTRODES ON DOPED CEO2 [J].