J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (4): 695-701.DOI: 10.1016/j.jmst.2018.10.015

• Orginal Article • Previous Articles    

Electrochemical property of multi-layer anode supported solid oxide fuel cell fabricated through sequential tape-casting and co-firing

Xiaoyang Chena, Weijie Nia, Xiaojia Dub, Zaihong Sunb, Tenglong Zhua*(), Qin Zhonga*(), Minfang Hanc*()   

  1. a School of Chemical Engineering, Nanjing University of Science and Technology, Jiangsu 210094, China
    b Suzhou Huatsing Jingkun New Energy Technology Co., Ltd., Jiangsu 215314, China
    c State Key Laboratory of Power Systems, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
  • Received:2018-05-25 Revised:2018-08-01 Accepted:2018-08-27 Online:2019-04-05 Published:2019-01-28
  • Contact: Zhu Tenglong,Zhong Qin,Han Minfang

Abstract:

In this work, a multi-layer anode supported solid oxide fuel cell (SOFC) is designed and successfully prepared through sequential tape casting and co-firing. The single cell is consisted of NiO-3YSZ (3YSZ: 3 mol.% yttria doped zirconia) anode support, NiO-8YSZ (8YSZ: 8 mol.% yttria stabilized zirconia) anode functional layer, dense 8YSZ electrolyte layer, and porous 3YSZ cathode scaffold layer with infiltrated La0.6Sr0.4Co0.2Fe0.8O3-δ cathode. The clear interfaces and good contacts between each layer, without element inter-diffusion being observed, suggest that this sequential tape casting and co-firing is a feasible and successful route for anode supported single cell fabrication. This cell exhibits remarkable high open circuit voltage of 1.097 V at 800°C under room temperature humidified hydrogen, with highly dense and gastight electrolyte layer. It provides a power density of 360 mW/cm2 under operation voltage of 0.75 V at 800°C and a stable operation of ~110 h at 750°C under current density of -300 mA/cm2. Furthermore, this cell also presents encouraging electrochemical responses under various anode hydrogen partial pressures and maintains high power output at low fuel concentrations.

Key words: Anode supported SOFC, Sequential tape casting, Co-firing, Cathode infiltration