使用Ni1-xCox-BCZY陽極提升以甲烷為燃料之質子傳導型固態氧化物燃料電池耐碳性;Carbon tolerant Ni1-xCox-BCZY anode for methane-fed proton conducting solid oxide fuel cell

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题名:	使用Ni1-xCox-BCZY陽極提升以甲烷為燃料之質子傳導型固態氧化物燃料電池耐碳性;Carbon tolerant Ni1-xCox-BCZY anode for methane-fed proton conducting solid oxide fuel cell
作者:	林家銘;Lin, Chia-Ming
贡献者:	機械工程學系
关键词:	質子傳導固態氧化物燃料電池;甲烷;穩定性;鎳鈷合金陽極;proton conducting solid oxide fuel cell;methane;stability;nickel cobalt anode
日期:	2021-08-18
上传时间:	2021-12-07 13:31:40 (UTC+8)
出版者:	國立中央大學
摘要:	本研究使用合金觸媒Ni1-xCox (x = 0.1, 0.2, 0.3)取代傳統鎳金屬觸媒作為固態氧化物燃料電池陽極之觸媒材料，達到改善陽極材料在長時間操作時，因使用碳氫燃料所造成陽極之積碳問題。透過固態反應法(Solid State Reaction, SSR)製備Ni1-xCox-BCZY作為質子傳導型固態氧化物燃料電池(P-SOFC)之合金陽極，並使用刮刀法及旋塗法製作陽極支撐型電池，並分別通以氫氣和甲烷進行電池性能及穩定性測試。目標以少許鈷元素(Cobalt, Co)與鎳元素(Nickel, Ni)進行置換，使Ni1-xCox電池達到比傳統以Ni金屬為主之電池更加優異的穩定性。實驗結果顯示，四種參雜比例中，Ni0.9Co0.1電池具有較佳之電池性能，在800 ?C下以氫氣為燃料時，最大功率密度質為390 mW/cm2，其歐姆阻抗與極化阻抗為1.714 Ω·cm2及0.017Ω·cm2，而以傳統鎳金屬為觸媒之電池性能為361 mW/cm2，其歐姆阻抗與極化阻抗為1.734Ω·cm2及0.021Ω·cm2；以甲烷為燃料時，Ni0.9Co0.1電池之最大功率密度質為169.1 mW/cm2，其歐姆阻抗與極化阻抗為1.932 Ω·cm2及0.417 Ω·cm2，而Ni電池之性能為162.2 mW/cm2，其歐姆阻抗與極化阻抗為1.954 Ω·cm2及0.431Ω·cm2，而在甲烷下之穩定性測試中Ni0.9Co0.1電池之壽命為19.5小時，比Ni電池5.5小時之電池壽命多3倍以上。;The rise in global warming and the Paris agreement on the control of temperature rise has increased the significance of green and carbon-neutral research for energy generation. Proton conducting solid oxide fuel cells (P-SOFC) are used for the conversion of hydrocarbon into electrical energy with carbon capture. Carbon form hydrocarbon fuels partially deposit on the Ni-BCZY anode of P-SOFC and further degrades the functioning of P-SOFC. In this thesis, Ni-BCZY anode is doped with Co for carbon deposition resistance and similar cell performance in P-SOFC operation. Ni1-xCox-BCZY (x = 0.1, 0.2, 0.3) anode material is prepared by easily scalable solid-state reaction process. The tape-casting process is used for developing an anode layer in P-SOFC cell integration. Further, electrochemical experiments were performed with CH4 as fuel for integrated P-SOFC to analyze the carbon resistance property of Ni1-xCox-BCZY anode. Also, the performance of integrated P-SOFC with H2 as fuel is also analyzed. The experimental results show that P-SOFC with Ni0.9Co0.1-BCZY anode exhibits a maximum power density of 390 mW/cm2 with pure H2 at 800 ?C, ohmic and polarization resistance is 1.714 Ω·cm2 and 0.017 Ω·cm2. Higher performance of 29 mW/cm2 compared to traditional Ni-BCZY anode P-SOFC is observed for Ni0.9Co0.1-BCZY anode. Ohmic and polarization resistance of Ni-BCZY anode is 1.734 Ω·cm2 and 0.021 Ω·cm2. The lower ohmic and polarization resistance of Ni0.9Co0.1-BCZY anode compared to traditional Ni anode indicate that the catalytic activity of Ni anode can be improved with cobalt doping. The higher performance of Ni0.9Co0.1-BCZY anode could be due to efficient conversion of gas to power and easy electron transfer. The Ni0.9Co0.1-BCZY anode P-SOFC with CH4 fuel exhibits a maximum power density of 169.1 mW/cm2 at 800 ?C. P-SOFC with Ni-BCZY anode generates a maximum power density of 162.2 mW/cm2 at 800 ?C. The ohmic and polarization resistance of Ni0.9Co0.1-BCZY anode P-SOFC is 1.932 Ω·cm2 and 0.417 Ω·cm2. Whereas for Ni-BCZY anode P-SOFC, ohmic and polarization resistance is 1.954 Ω·cm2 and 0.431 Ω·cm2. The lower resistance and higher performance of Ni0.9Co0.1-BCZY anode compared to Ni-BCZY attributes to the low carbon deposition and immediate conversion of CH4 to power. P-SOFC with Ni0.9Co0.1-BCZY anode exhibits nearly 3.5 times longer life time compared to Ni-BCZY anode with CH4 as fuel. A NiCo-BCZY anode for lower carbon deposition and higher performance of P-SOFC with pure H2 and CH4 is developed in this work. This work helps for generating both clean and carbon capture energy generation.
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