In the past few years, YSZ (Yttria Stabilized Zirconia) had been the dominate electrolyte material of high temperature (>1000¢J) solid oxide fuel cells (SOFCs). Nowadays, CGO (Cerium Gadolinium Oxide) material has been considered as preferred electrolytes for solid oxide fuel cells (IT-SOFCs) used in the temperature range of 600¢J~800¢J due to their excellent oxygen-ion conductivity compared to YSZ. The performance of unit cells can be improved when an anode functional layer (AFL) is employed between the anode composite substrate and the electrolyte. Therefore, AFL has been a lot of use in SOFCs
In this study, the deposition system of EAVD (Electrostatic Assisted Vapor Deposition) was employed to deposite CGO electrolyte films and NiO-CGO anode functional layer. In this study, deposition parameters such as deposition temperature, flow rate and concentration of precursor solution were varied to figure out their effects for the resultant films. Finally, the OCV of unit cells was also measured in this study.
In this work, the optimum concentration of precursor solution for NiO-CGO anode functional layer and CGO films were 0.2 M and 0.3 M, respectively. The optimum deposition temperature and flow rate for this two films were both 400¢J and 6 mL/hr, respectively. When the cells were test with H2 as fuel and air as oxidant, the unit cell of Ni-CGO/CGO/BSCF with CGO film thickness of 25 £gm exhibited an maximum OCV of 0.86 V at 500¢J and the other unit cell of Ni-CGO/AFL/CGO/BSCF with 25 £gm CGO film thickness and 10 £gm AFL exhibited an maximum OCV of 0.91 V at 500¢J.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0722109-151200 |
| Date | 22 July 2009 |
| Creators | Huang, Jin-Bang |
| Contributors | Chi-Shiung Hsi, Bing-Hwai Hwang, Hong-Yang Lu |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0722109-151200 |
| Rights | not_available, Copyright information available at source archive |
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