Influence of Size of NiO on the Electrochemical Properties for SOFC Anodes

Chem. J. Chinese Universities ›› 2004, Vol. 25 ›› Issue (3): 501.

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Influence of Size of NiO on the Electrochemical Properties for SOFC Anodes

WANG Jin-Xia^1,4, JI Yuan¹, XU Da-Peng¹, HE Tian-Min¹, WANG Wei-Ran¹, ZHOU Xian-Feng¹, SU Wen-Hui^1,2,3

1. Center for Rare Earth Solid States Physics, Deparment of Condensed Matter Physics, Jilin University, Changchun 130023, China;
2. Center For Condensed Matter Science and Technology, Harbin Institute of Technology, Harbin 150001, China;
3. International Center for Materials Physics, Academia Sinica, Shenyang 110015, China;
4. The Environmental Managemental Institute of China, Qinhuangdao 066004, China

Received:2003-01-13 Online:2004-03-24 Published:2004-03-24

Abstract

Abstract: Nanometric NiO with a high specific surface area was synthesized by sol-gel method. NiO-YSZ anode materials were prepared by solid state reaction and their impedance spctra were measured. The analysis results show that NiO-YSZ anode materials with nanometric oxide NiO have a smaller polarization resistance R_p, higher conductivity than those with original powder NiO. The single cell with the anode of nanometric NiO-YSZ in 55% mass fraction has a higher power density and higher current density than that of the cell with the anode of original power NiO-YSZ in the same mass fraction. These demonstrate that the optimization of the anode can be obtained by increasing the three phase boundary(TPB) line among Nickel, YSZ and Hydrogen, which can be achieved by decreasing the size of the NiO.

Key words: Sol-gel method, Three-phase boundaries, SOFC, Anode.

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WANG Jin-Xia, JI Yuan, XU Da-Peng, HE Tian-Min, WANG Wei-Ran, ZHOU Xian-Feng, SU Wen-Hui. Influence of Size of NiO on the Electrochemical Properties for SOFC Anodes[J]. Chem. J. Chinese Universities, 2004, 25(3): 501.

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Influence of Size of NiO on the Electrochemical Properties for SOFC Anodes

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