本文選題：固體氧化物燃料電池 + 金屬支撐　； 參考：《哈爾濱工業(yè)大學(xué)》2017年碩士論文

【摘要】：固體氧化物燃料電池(SOFC)技術(shù)是非常有競爭力的綠色發(fā)電技術(shù),然而傳統(tǒng)SOFC材料相對高昂的制造成本及電池封裝工藝的不可靠,仍然阻礙著SOFC的商業(yè)化進(jìn)程。將SOFC運(yùn)行溫度降至中低溫是解決目前問題的重要途徑,當(dāng)電池操作溫度降低至中低溫時,SOFC的支撐體及連接體便可以采用低成本的不銹鋼金屬材料。金屬支撐型SOFC具有價格低廉、抗熱沖擊性能優(yōu)越、抗氧化還原性能好、便于加工、封裝容易等優(yōu)點。微管式SOFC具有體積功率密度高、易封裝等優(yōu)點。我們首次提出金屬支撐型微管式固體氧化物燃料電池這一全新的電池結(jié)構(gòu),兼具金屬支撐和微管式SOFC的優(yōu)點。本論文采用濕法流延工藝及干壓浸漬涂敷工藝制備具有均勻燃料氣通道的平板式金屬支撐體。濕法共流延工藝制備的金屬支撐體,通過調(diào)控流延漿料中造孔劑和有機(jī)物的配比,改進(jìn)燒結(jié)程序,優(yōu)化了金屬支撐體的孔道結(jié)構(gòu),提高了金屬支撐體的機(jī)械強(qiáng)度。干壓法工藝流程簡單,通過對金屬支撐體進(jìn)行預(yù)燒結(jié)改善了其燒結(jié)特性,其抗彎折強(qiáng)度達(dá)到144.72 N。本論文采用相轉(zhuǎn)化法制備了具有雙孔道結(jié)構(gòu)的微管式金屬支撐體,研究了紡絲壓力、固含量對金屬微管形貌的影響,得到了優(yōu)化的工藝參數(shù),相較于傳統(tǒng)陽極支撐微管,其機(jī)械強(qiáng)度提高了40%。本論文采用溶膠凝膠法制備了Sr_(2-x)Ca_xFe1.5Mo_(0.5)O6-δ(SCFM)系列陰極材料,研究表明Ca摻雜量為0.1~_(0.5)時,SCFM在高溫還原氣氛下具有良好的穩(wěn)定性。Sr1.5Ca_(0.5)Fe1.5Mo_(0.5)O6-δ陰極材料具有最高的電導(dǎo)率,500 oC下空氣中達(dá)到11.69S·cm-1。該陰極材料與傳統(tǒng)的電解質(zhì)材料均具有良好的化學(xué)相容性,通過A位Ca2+摻雜,降低了該電極材料的熱膨脹系數(shù),與SFM相比,Ca摻雜后材料具有更好的電化學(xué)性能,750 oC時極化阻抗降低至0.18Ω·cm2,陰極材料在氧化氣氛和還原氣氛下還具有優(yōu)異的熱穩(wěn)定性。為了進(jìn)一步優(yōu)化陰極性能,采用機(jī)械混合法制備SCFM-SDC陰極,復(fù)合40 wt%氧離子導(dǎo)體GDC后,750 oC時極化阻抗進(jìn)一步降低至0.17Ω·cm2。
[Abstract]:Solid oxide fuel cell (SOFC) technology is a very competitive green power generation technology. However, the relatively high manufacturing cost of traditional SOFC materials and the unreliability of battery packaging technology still hinder the commercialization of SOFC. Lowering the operating temperature of SOFC to medium and low temperature is an important way to solve the current problem. When the operating temperature of SOFC is reduced to medium and low temperature, the support and connectors of SOFC can be made of low cost stainless steel metal materials. Metal-supported SOFC has the advantages of low price, excellent thermal shock resistance, good oxidation resistance and reduction performance, easy processing and easy package. Microtube SOFC has the advantages of high bulk power density and easy encapsulation. For the first time, we present a novel structure of metal-supported microtube-type solid oxide fuel cell (SOFC), which has the advantages of both metal-supported and microtube-type SOFC. In this paper, a plate metal support with uniform fuel gas channel was prepared by wet casting and dry pressure impregnation coating. By adjusting the ratio of pore-forming agent and organic matter in the casting slurry, the sintering procedure was improved, the pore structure of metal support was optimized and the mechanical strength of metal support was improved. The dry pressing process is simple and the sintering characteristics of the metal support are improved by pre-sintering. The flexural strength is up to 144.72 N. In this paper, microtube metal supports with double pore structure were prepared by phase inversion method. The effects of spinning pressure and solid content on the morphology of metal microtubules were studied. The optimized technological parameters were obtained, compared with the traditional anode supported microtubules. Its mechanical strength has increased by 40%. In this paper, a series of cathode materials of SrStue 2-xCaX Cax Fe 1.5MoO 0.5O 6- 未 SCFM have been prepared by sol-gel method. The results show that SCFM has good stability in the atmosphere of high temperature reduction. The cathode material has the highest conductivity of 500oC and the highest conductivity of 11.69s cm-1in the air. The cathode material has good chemical compatibility with the traditional electrolyte material, and the thermal expansion coefficient of the electrode material is reduced by doping with A-site Ca2. Compared with SFM, Ca-doped materials have better electrochemical performance and lower polarization impedance to 0.18 惟 cm ~ 2 at 750oC. The cathode materials also have excellent thermal stability in oxidation and reduction atmospheres. In order to further optimize the cathode performance, the SCFM-SDC cathode was prepared by mechanical mixing method. The polarization impedance of 40 wt% oxygen ion conductor GDC was further reduced to 0.17 惟 cm 2 at 750oC.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM911.4

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