High temperature water electrolysis using metal supported solid oxide electrolyser cells (SOEC)

被引：146

作者：

Schiller, G. ^{[1
]}

Ansar, A. ^{[1
]}

Lang, M. ^{[1
]}

Patz, O. ^{[1
]}

机构：

[1] Inst Tech Thermodynam, Deutsch Zentrum Luft & Raumfahrt, D-70569 Stuttgart, Germany

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 2009年 / 39卷 / 02期

关键词：

High temperature steam electrolysis; Metal supported cell; Electrochemical performance; Degradation behaviour; POLARIZATION BEHAVIOR; BARRIER LAYERS; PERFORMANCE; DIFFUSION; NI/YSZ;

D O I：

10.1007/s10800-008-9672-6

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Metal supported cells as developed according to the DLR SOFC concept by applying plasma deposition technologies were investigated for use as solid oxide electrolyser cells (SOEC) for high temperature steam electrolysis. Cells consisting of a porous ferritic steel support, a diffusion barrier layer, a Ni/YSZ hydrogen electrode, a YSZ electrolyte and a LSCF oxygen electrode were electrochemically characterised by means of i-V characteristics and electrochemical impedance spectroscopy measurements including a long-term test over 2000 h. The cell voltage during electrolysis operation at a current density of -1.0 A cm(-2) was 1.28 V at an operating temperature of 850 A degrees C and 1.4 V at 800 A degrees C. A long-term test run over 2000 h with a steam content of 43% at 800 A degrees C and a current density of -0.3 A cm(-2) showed a degradation rate of 3.2% per 1000 h. The impedance spectra revealed a significantly enhanced polarisation resistance during electrolysis operation compared to fuel cell operation which was mainly attributed to the hydrogen electrode.

引用

页码：293 / 301

页数：9

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