使用生質燃料的固態燃料電池組之開發及測試

Abstract

本研究是以四層結構Ni-YSZ/8YSZ/SDC/LSCF組成之固態氧化物燃料電池（SOFC），在一個小型、可攜帶式加熱器中進行性能輸出。經由粉體分散實驗以及鍍膜漿料的研究，製備出分散均勻之Ni和8YSZ陽極，也可控制電解質的厚度變化。另外，在強度，孔隙率，以及Ni/ YSZ陽極的收縮率之間的關係進行了探討，揭示陽極的孔隙率的重要性。通過AC阻抗儀測量，針對SOFC全電池的電阻進行了全面性的研究。最後，在提供H2做為燃料的情況下，單電池功率輸出可達172 mW cm-2；另一方面，通過使用柳杉渣（CW）的生質燃料，電功率輸出約為62 mW cm-2。本實驗藉由結合固態燃料電池與具有高氧化鋁基澆注料和陶瓷耐火綿之微型加熱器，示範出可攜式型燃料電池的在未來的可行性以及潛力。

Solid Oxide Fuel Cell (SOFC) consisted of four layer structure of Ni-YSZ/ 8YSZ/ SDC/ LSCF was fabricated and sufficiently heated by a portable heater sufficient to an operation temperature of <800 oC. The detail investigation of powder dispersion in slurry, the thickness variation of electrolyte, assembly of half and single cells was conducted. By using AC impedance measuring, the resistances of the SOFC were also investigated. The relationship between strength, porosity, and shrinkage of the Ni/YSZ anode was also discussed to reveal the importance of anode porosity. The power output of single SOFC is 172 mW cm-2 by providing H2 and 62 mW cm-2 by using Cryptomeria waste (CW) bio-fuels. On the other hand, portable heater with high alumina-based castables and ceramic blanket were assembled that can be a prototype of the portable SOFC in future.