Improved gas diffusion within microchanneled cathode supports of SOECs for steam electrolysis

被引：43

作者：

Dong, Dehua ^{[1
]}

Shao, Xin ^{[1
]}

Hu, Xun ^{[1
]}

Chen, Kongfa ^{[1
]}

Xie, Kui ^{[2
]}

Yu, Libo ^{[1
,3
]}

Ye, Zhengmao ^{[3
]}

Yang, Ping ^{[3
]}

Parkinson, Gordon ^{[1
]}

Li, Chun-Zhu ^{[1
]}

机构：

[1] Curtin Univ Technol, Fuels & Energy Technol Inst, Perth, WA 6845, Australia

[2] Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Design & Assembly Funct Nanostruct, 155 Yangqiao Rd, Fuzhou 350002, Peoples R China

[3] Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2016年 / 41卷 / 44期

基金：

澳大利亚研究理事会;

关键词：

Solid oxide electrolysis cell; Steam electrolysis; Gas diffusion; Cathode support; Microchanneled structure; OXIDE FUEL-CELLS; PERFORMANCE; HYDROGEN; ANODE; TRANSPORT; MEMBRANES;

D O I：

10.1016/j.ijhydene.2016.08.175

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：

Gas diffusion limitation within Ni/YSZ cathode supports of solid oxide electrolysis cells (SOECs) during steam electrolysis has been reported in previous studies. In this study, a microchanneled cathode support has been prepared by a mesh-templating phase-inversion process to improve the gas diffusion. Numerous channels with one end open on the cathode surface cross the support and are stopped on the other side of the support by a porous layer which acts as a cathode functional layer. The integrated structure is ideal for achieving both fast gas diffusion and a long three-phase-boundary for performing the cathode reactions. Compared with conventional cathode supports, the microchanneled cathode support produced higher current densities at low steam concentrations of feed gas during steam electrolysis, which is attributed to the fast gas diffusion achieved within the channels. Therefore, the microchannel structure of cathode supports can increase hydrogen yield and steam utilization efficiency. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：19829 / 19835

页数：7

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