Citation: LIU Dan-Dan, XIE Yong-Min, LIU Jiang, WANG Jin-Xia. Preparation of NiO-YSZ-Graphite Aqueous Slurry and Its Application in Fabricating Solid Oxide Fuel Cells by Slip-Casting[J]. Acta Physico-Chimica Sinica, ;2014, 30(2): 331-337. doi: 10.3866/PKU.WHXB201312241 shu

Preparation of NiO-YSZ-Graphite Aqueous Slurry and Its Application in Fabricating Solid Oxide Fuel Cells by Slip-Casting

1.
1 The Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China;
2 New Energy Research Institute, College of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China;
3 Department of Electronics & Information Engineering, Ningbo University of Technology, Ningbo 315016, Zhejiang Province, P. R. China

Received Date: 22 October 2013
Available Online: 24 December 2013
Fund Project: 国家自然科学基金(21276097) (21276097)浙江省自然科学基金(Y1090035)资助项目 (Y1090035)

Cermet of Ni-YSZ (yttrium-stabilized zirconia) is commonly used as the anode material of solid oxide fuel cells (SOFCs) and the properties of the NiO-YSZ slurry has a significant effect on the performance of SOFCs prepared by wet processes. The stability of the NiO-YSZ slurry was investigated through zeta potential analysis. The effects of six dispersants on the surface zeta potentials of NiO and YSZ were examined. It was found that the zeta potential of NiO was opposite to that of YSZ when the anionic or amphoteric dispersant existed. When the cationic dispersant poly(diallyldimethylammonium chloride) (PDAC) was used, the zeta potentials for both NiO and YSZ were positive and they could be simultaneously suspended in water. By adding graphite, which is used as the pore former when fabricating the SOFC anode, into the NiO-YSZ suspension and using polyvinylpyrrolidone (PVP) as the dispersant of graphite, a stable NiO-YSZgraphite aqueous slurry was successfully prepared. The slurry was used to fabricate anode supports for SOFCs with the slip-casting technique. A typical single anode-supported SOFC showed a maximum power density of 509 mW·cm^-2 at 800℃. The microstructure of the SOFC with the anode support was examined by scanning electron microscope (SEM) analysis and it was found that the electrolyte and anode bonded well and the pores were homogenously distributed in the anode.
- Solid oxide fuel cell,
- Slip-casting,
- Anode support,
- Suspension,
- Zeta potential,
- Dispersant
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