### 管式电解质支撑型直接碳固体氧化物燃料电池的浸渍法制备及电性能

1. 1 江西理工大学冶金与化学工程学院,江西赣州341000
2 华南理工大学环境与能源学院新能源研究所,广州510006
• 收稿日期:2016-08-17 发布日期:2017-01-12
• 通讯作者: 刘江 E-mail:jiangliu@scut.edu.cn
• 基金资助:
国家自然科学基金(21276097，21567008，21263005)

### Fabrication and Performance of Tubular Electrolyte-Supporting Direct Carbon Solid Oxide Fuel Cell by Dip Coating Technique

Yong-Min XIE1,2,Xiao-Qiang WANG2,Jiang LIU2,*(),Chang-Lin YU1

1. 1 School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P. R. China
2 New Energy Research Institute, School of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China
• Received:2016-08-17 Published:2017-01-12
• Contact: Jiang LIU E-mail:jiangliu@scut.edu.cn
• Supported by:
the National Natural Science Foundation of China(21276097，21567008，21263005)

Abstract:

Tubular electrolyte-supporting solid oxide fuel cells (SOFCs) are particularly suitable for fundamental research of direct carbon SOFCs (DC-SOFCs) because they exhibit high stability, have simple seal requirements and are compatible with a variety of electrode materials. We have developed a dip-coating technique for the simple preparation of tubular electrolyte-supporting SOFCs using tubular yttria-stabilized zirconia (YSZ) electrolyte membrane substrates. Single SOFCs were assembled with a cermet consisting of gadolinium doped ceria (GDC) mixed with silver as both the cathode and anode. The single cells were tested with humidified hydrogen and 5% Fe-loaded activated carbon (w, mass fraction) as the fuel. Ambient air was used as the oxidant. The open-circuit voltages were comparable to the theoretical values and the scanning electron microscopy (SEM) results showed that the electrolyte membrane was quite dense. The cell that used activated carbon as fuel exhibited a maximum power density of 280 mW·cm-2 at 800℃, which was close to that of a cell that used hydrogen as fuel (330 mW·cm-2). The results of impedance spectroscopy showed that the performance of the cells was mainly influenced by the electrolyte ohmic resistance. The discharge time of the DC-SOFC at a constant current of 1 A was 2.1 h, which represented a fuel utilization of 36%. The performance of the DC-SOFC with reloaded fuel was nearly identical to its initial performance, which indicated that the YSZ electrolyte membrane substrate was stable when used in the DC-SOFCs. The degradation performance of the DC-SOFC during the discharge test was also analyzed.

MSC2000:

• O646