| DC 欄位 |
值 |
語言 |
| DC.contributor | 材料科學與工程研究所 | zh_TW |
| DC.creator | 嚴豐年 | zh_TW |
| DC.creator | Feng-Nien Yen | en_US |
| dc.date.accessioned | 2019-8-21T07:39:07Z | |
| dc.date.available | 2019-8-21T07:39:07Z | |
| dc.date.issued | 2019 | |
| dc.identifier.uri | http://ir.lib.ncu.edu.tw:444/thesis/view_etd.asp?URN=106329006 | |
| dc.contributor.department | 材料科學與工程研究所 | zh_TW |
| DC.description | 國立中央大學 | zh_TW |
| DC.description | National Central University | en_US |
| dc.description.abstract | 本研究使用甘胺酸-硝酸鹽燃燒合成法製備具有鈣鈦礦結晶結構(La0.8Sr0.2MnO3；LSM，La0.8Sr0.2CuxMn1-xO3 x=0.1、0.2、0.3；LSC1M；LSC2M；LSC3M)之陰極粉末。探討前驅硝酸鹽溶液經由調整不同pH值，甘胺酸硝酸比(g/n ratio)，以及初生粉體在不同煆燒溫度(800、900、1000、1100 ℃)之結晶結構、形貌、熱機械性質等，再利用最好之參數製成固態氧化物燃料電池(SOFC)，進行電化學測試。經由X光繞射分析結晶結構以及掃描式電子顯微鏡觀察表面微結構，發現在pH=3、4以及g/n=1.00、1.25有最完整之特徵峰以及粉體形貌，由熱膨脹分析發現LSM4/1.25與電解質BCZY之熱膨脹係數最為相近；導電度可達495.38 S/cm，進行性能測試結果顯示在操作溫度800℃擁有最高之功率密度:41.8 mW/cm2，而摻雜銅進入LSM之實驗發現，導電度分析在LSC2M有最高之導電度提升，由495.38 S/cm提升到858.26 S/cm，進行性能結果測試發現LSM4/1.25摻雜銅取代錳有效能60%之提升，在操作溫度700℃從22.33 mW/cm2提升到37.20 mW/cm2，EIS實驗發現極化阻抗Rp下降了4.55 Ωcm2。 | zh_TW |
| dc.description.abstract | In this study, the nanostructured perovskite La0.8Sr0.2MnO3 (LSM) and La0.8Sr0.2Mn1-xCuxO3 (note as x=0.1; LSC1M, 0.2; LSC2M, 0.3; LSC3M) prepared by the glycine-nitrate combustion synthesis method were considered as a potential candidate for use as cathode in solid oxide fuel cells (SOFC) operated at intermediate-temperature. In the present work, combustion synthesis method was investigated by adjusting the pH of LSM nitrate solution (pH=2, 3, 4, 5) and ratio between glycine and nitrate (G/N= 0.75, 1.00, 1.25). The crystal structure and morphology of the powders after calcining were analyzed and also its thermal properties and electrochemical characteristic were discussed. The optimal combustion synthesis parameters (pH and G/N) were used to synthesize the LSCxM. Then the crystal structure and electrochemical properties were investigated. Finally, the feasibility for using as cathode in P-SOFC though combining LSM as cathode backbone and doping Cu to replace Mn. The results of LSM analysis showed that LSM1.00/3, LSM1.00/4, LSM1.25/3 and LSM1.25/4 were the optimal parameters for combustion synthesis whose crystal structure and morphology were the most suitable as cathode for SOFC. Among all, LSM1.25/4 was analyzed that its average particle size around 30nm. For the measurement of thermal expansion coefficient (TMA), the coefficient of LSM1.25/4 was about 14.36 × 10-6 K-1 which was the closest to that of electrolyte BCZY. In the results of four-probe DC conductivity measurement, LSM1.25/4 had the highest conductivity near 495.38 S/cm.The performance test results show that the highest power density is 41.8 mW/cm2 at 800 °C, and the experiment of doping copper into LSM found that the conductivity analysis has the highest conductivity increase in LSC2M, from 495.38 S/cm improved to 858.26 S/cm. The performance test showed that the LSM4/1.25 doped 0.2 copper-substituted manganese had a 60% improvement in efficiency, and the operating temperature was increased from 22.33 mW/cm2 to 37.20 mW/cm2 at 700 °C. The resistance Rp drops by 4.55 Ωcm2. | en_US |
| DC.subject | 固態氧化物燃料電池 | zh_TW |
| DC.subject | 燃燒合成法 | zh_TW |
| DC.subject | LSM陰極材料 | zh_TW |
| DC.subject | 銅摻雜 | zh_TW |
| DC.subject | Solid oxide fuel cell(SOFC) | en_US |
| DC.subject | Lanthanum-strontium- manganese-oxide | en_US |
| DC.subject | Copper doping | en_US |
| DC.title | Cu摻雜至La0.8Sr0.2CuxMn1-xO3 (LSCxM,x=0.1、0.2、0.3) 作為中低溫SOFC陰極之可行性研究 | zh_TW |
| dc.language.iso | zh-TW | zh-TW |
| DC.title | On the copper doping of La0.8Sr0.2MnO3 (LSM) cathode for IT-SOFCs | en_US |
| DC.type | 博碩士論文 | zh_TW |
| DC.type | thesis | en_US |
| DC.publisher | National Central University | en_US |