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The Study of the Performance of Ni-Cu Alloy Synthetized by Hard Template as Anode in SOFC

Author: XuJunZuo
Tutor: YouHongXin
School: Dalian University of Technology
Course: Safety Engineering
Keywords: Ni-Cu alloy SOFC Hard template Carbon deposition
CLC: TM911.4
Type: Master's thesis
Year: 2012
Downloads: 80
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Abstract


In this paper, a new Ni-Cu alloy composite anode materials (SOFC) was synthetized with hard template method. Its Carbon Deposition stability and electrochemical performance were investigated.The Ni-Cu alloy anode materials powder was characterized by XRD and SEM. The morphology and microstructure of the surface of anode and cross section of single cells were characterized by SEM. By the use of electrochemical workstation, the electrical properties, activation polarization and AC impedance spectroscopy were tested.The results show that:the NixCu1-x anode material powder has a cubic crystal structure with long columnar shape, and closely connected with each other, leading to porouse structure without agglomerations. The anode of single cells was porous and tighten-connected with electrolyte substrates. However, they were gapped at high temperature in a long period. The performance of traditional NiO-YSZ single cell was increased as the operation temperature rises. The maximum power density were554mW·cm-2and489mW·cm-2respectively in hydrogen and methane at1000℃,but shows a poor performance in resistance of coking. The power performances of NixCu1-x-YSZ single cell was were lower than NiO-YSZ. NixCu1-x-YSZ single cell has stable voltage without agglomeration and carbon deposition in hydrogen and methane at800℃,simultaneously output470and315mW·cm-2maximum power density respectively. Experiments with H2and CH4,the open voltage of Ni-Cu alloy prepared by hard template used to make single cell is lower than gel-sol method, but the maximum powder density is higher than the latter one.The results show that:NixCu1-x-YSZ single cell has a good catalytic activity and resistance of coking properties.

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CLC: > Industrial Technology > Electrotechnical > Independent power supply technology (direct power) > Chemical power sources,batteries, fuel cells > Fuel cell
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