固態氧化物燃料電池陽極材料Co3O4-8YSZ 燒結研究

A Study on Sintering of 8YSZ Powder and Co3O4 Content in SOFC Anode Material

蔡政憲(Cheng-Hsien Tsai)

指導教授 ： 王玉瑞

國立臺北科技大學/工程學院/材料科學與工程研究所/碩士(2007年)

https://doi.org/10.6841/NTUT.2007.00463

摘要

燃料電池是一種利用電化學反應的發電裝置，燃料電池與一般電池不同，可不經燃燒過程，可直接將化學能轉換成電能。由於具備潔淨與高效率特性，是眾所矚目的新一代的替代能源技術。固態氧化物燃料電池（SOFC）在以鎳系Ni/YSZ陶金作為陽極材料時，在採用H2作為燃料源時，其工作效能頗佳；但在採用甲烷作為燃料時，蒸氣甲烷在內重整反應過程中會裂解產生積碳於電極上，而導致電池性能衰減。需以水蒸氣與甲烷大於3的混合比例，以縮短混合燃料的重整反應以避免積碳。而這種高濕度的操作環境對固態氧化物燃料電池並不理想。根據前人研究，鈷(Co)系金屬觸媒運用於SOFC陽極材料，則可減低碳氫化合物氣體的積碳問題 。
本文研究以不同比例之四氧化三鈷添加物，製備成的金屬氧化物陶瓷電極，來探討在不同金屬氧化物比例下，以不同燒結溫度、持溫時間，探討適當的製程條件，以製備鈷系SOFC 陽極金屬氧化物複相陶瓷。

關鍵字

固態氧化物燃料電池 ； 陶金觸媒 ； 內重整反應

並列摘要

Fuel cell technology is an extremely promising method for electrical power generation due to its ability to achieve very high efficiency with very low level of pollutant. The efficiency of solid oxide fuel cell using the Ni/YSZ cermet as anode material and using the hydrogen as fuel is well recognized. However, if the methane is used as fuel, it will be decomposed in reformer and produce carbon deposit on Ni catalyst. As a consequence, the efficiency of the cell decreases and the performance deteriorates. To overcome these shortcomings, the vapor/methane ratio of the mixture must be larger than three to accelerate the steam/methane reforming reaction and avoid the carbon formation. In such a way, to maintain a high humidity condition in the cell is necessary but not beneficial. Use Co as catalyst in the anode can be a good alternative to lower the carbon formation according to the previous researches.
In this study, different combinations of Co oxides were prepared and tested under various sintering time and temperate to correlate their conductivities, and evaluate their potentials as becoming alternatives of anode materials for SOFC.

並列關鍵字

SOFC ； Cermet ； Catalyst ； Reforming

參考文獻

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