質子傳輸型固態氧化物燃料電池之陰極微結構優化與開發

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賴意崴(Yi-Wei Lai) 查詢紙本館藏

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材料科學與工程研究所

論文名稱

質子傳輸型固態氧化物燃料電池之陰極微結構優化與開發
(Development and microstructure optimization for improving performance in proton-conducting solid oxide fuel cells)

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至系統瀏覽論文 (2025-7-1以後開放)

摘要(中)

本研究藉由添加直徑500 nm之聚苯乙烯奈米球(PS奈米球)作為陰極材料之造孔劑，開發出用於質子傳輸型固態氧化物燃料電池之孔隙自我梯度排列陰極，並且研究添加PS奈米球之含量對於陰極微觀結構與電池性能之影響。由於PS奈米球與LSCF粉末兩者之密度差異，驅使PS奈米球於陰極重新排列，產生具有梯度之多孔陰極結構。研究結果顯示，15%PS-LSCF於800 ℃之操作溫度下具有146.6 mW/cm2之功率密度，其歐姆阻抗與極化阻抗分別為3.117 Ω‧cm2與0.070 Ω‧cm2；而未添加PS奈米球之LSCF陰極(0%PS-LSCF)僅有49.51 mW/cm2之功率密度，其歐姆阻抗與極化阻抗分別為6.781 Ω‧cm2與0.292 Ω‧cm2。此性能之提升可歸因於具有梯度之多孔陰極結構，使得15%PS-LSCF具有更緻密之陰極－電解質界面，並有效降低電池之歐姆阻抗與極化阻抗。

摘要(英)

In this study, 500-nm-diameter polystyrene (PS) nanospheres are used as the pore forming agent in LSCF cathode for proton-conducting solid oxide fuel cells. The effects of PS nanosphere amount on cathode microstructure and cell performance is investigated. A gradient porous cathode is fabricated due to the density difference between the PS nanospheres and LSCF cathode. Results show that, 15%PS-LSCF exhibits highest power density of 146.6 mW/cm2 at 800 ℃ with an ohmic and polarization resistance of 3.117 Ω‧cm2 and 0.070 Ω‧cm2 respectively. Whereas, the 0%PS-LSCF exhibits a power density of 9.51 mW/cm2 with an ohmic and polarization resistances of 6.781 Ω‧cm2 and 0.292 Ω‧cm2 respectively. The 15% PS-LSCF cell exhibits lower cell resistance and enhanced cell performance of three times compared to 0% PS-LSCF cell. The higher cell performance of 15% PS-LSCF cell is attributed to the gradient porous cathode with higher cathode-electrolyte interface favoring an efficient protonic transfer in cell performance.

關鍵字(中)

★ 聚苯乙烯奈米球
★ 造孔劑
★ 孔隙率
★ 陰極
★ 鑭鍶鈷鐵
★ 質子傳輸型固態氧化物燃料電池

關鍵字(英)

★ polystyrene nanosphere
★ pore former
★ porosity
★ cathode
★ LSCF
★ proton-conducting solid oxide fuel cell

論文目次

摘要 i
Abstract ii
致謝 iii
目錄 iv
圖目錄 vi
表目錄 viii
前言 1
第1章實驗原理與文獻回顧 3
1.1. 固態氧化物燃料電池(SOFC) 3
1.1.1. SOFC之原理 3
1.1.2. SOFC之優點 5
1.1.3. SOFC之結構 6
1.2. SOFC之電解質材料 8
1.2.1. 螢石(Fluorite)結構 8
1.2.2. 鈣鈦礦(Perovskite)結構 10
1.2.3. 質子傳輸電解質 11
1.2.4. 質子傳輸機制 11
1.3. SOFC之粉末製備 13
1.3.1. 固態反應法(Solid-state reaction) 13
1.3.2. 溶膠-凝膠法(Sol-gel method) 13
1.3.3. 燃燒法(Combustion) 13
1.3.4. 靜電紡絲法(Electrospinning method) 13
1.4. SOFC之電池製程 15
1.4.1. 刮刀成型技術(Tape casting) 15
1.4.2. 乾壓成型技術(Dry pressing) 15
1.4.3. 旋轉塗佈技術(Spin coating) 16
1.5. 電化學分析原理 17
1.5.1. 極化曲線(I-V curve) 17
1.5.2. 電化學交流阻抗圖譜 18
第2章實驗方法 20
2.1. 實驗藥品 20
2.2. 實驗方法與流程 21
2.2.1. BaCe0.6Zr0.2Y0.2O3-δ前驅粉末製備 21
2.2.2. 陽極支撐之半電池製備 22
2.2.3. 陰極孔隙自我梯度排列之單電池製備 23
2.2.4. LSCF-Ag奈米纖維複合陰極之單電池製備 24
2.3. 材料性質分析 25
2.3.1. X-ray粉末繞射分析 25
2.3.2. 掃描式電子顯微鏡 26
2.4. 電池I-V性能量測 26
2.5. 電化學交流阻抗分析 26
第3章結果與討論 27
3.1. 材料性質分析 27
3.1.1. 煆燒粉末與奈米纖維之XRD與微結構分析 27
3.1.2. 單電池之XRD與微結構分析 29
3.2. 電池之電化學性能測量與分析 32
3.2.1. 陰極孔隙自我梯度排列 32
第4章結論 38
參考文獻 39

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指導教授

李勝偉(Sheng-Wei Lee)

審核日期

2020-7-2

推文