本文選題：固體氧化物燃料 + 電池對(duì)稱(chēng)電極��； 參考：《長(zhǎng)春理工大學(xué)》2017年碩士論文

【摘要】：固體氧化物燃料電池(SOFC)作為一種新能源技術(shù),因其具有能量轉(zhuǎn)化效率高、環(huán)境友好和燃料適應(yīng)性強(qiáng)等優(yōu)點(diǎn),受到了人們的極大關(guān)注。對(duì)稱(chēng)電極材料由于采用同一種材料作為SOFC的陰極和陽(yáng)極材料,不但可以克服硫毒化和碳沉積,也可以在一定程度上減少電池的組成部件,使制備過(guò)程變得更加簡(jiǎn)單,減少了燒結(jié)程序,大大降低了電池的制作成本。本文采用溶膠—凝膠法制備了PrBaFe_2O_(5+δ)(PBFO)材料,系統(tǒng)地研究了其作為SOFC對(duì)稱(chēng)電極的可行性。研究表明,經(jīng)過(guò)在空氣中1100 oC的燒結(jié)10 h,可以得到單一的純相結(jié)構(gòu);PBFO在850 oC時(shí),空氣和氫氣中的電導(dǎo)率分別為25S/cm和3.25 S/cm;以H2為燃料,單電池在850 oC時(shí)最大輸出功率密度為618 mW/cm2,CH4為燃料,單電池在900 oC時(shí)最大輸出功率密度為220 mW/cm2。良好的電學(xué)性能和電化學(xué)性能,表明該P(yáng)BFO有望成為一種新型的SOFC對(duì)稱(chēng)電極材料。為進(jìn)一步提高PBFO對(duì)稱(chēng)電極材料在CH4燃料中的電池性能,我們采用化學(xué)浸漬的方法,分別制備了Sm0.2Ce0.8O1.9(SDC)浸漬和Co-Fe浸漬的PBFO復(fù)合材料。結(jié)果表明,SDC的引入增強(qiáng)了材料的離子導(dǎo)電性,從而造成了三相界面的增加,降低了界面電化學(xué)阻抗值,提高了電池的輸出性能,其中浸漬3次的樣品表現(xiàn)出了最佳性能,850oC時(shí)H2為燃料,電池最大輸出功率為1170 mW/cm2,900 oC時(shí)CH4為燃料,電池最大輸出功率為380 mW/cm2,分別比浸漬前提高了89%和73%;Co-Fe復(fù)合顆粒的引入增強(qiáng)了陽(yáng)極部分的電子導(dǎo)電能力,降低了界面阻抗值,同樣提高了電池的輸出性能,其中浸漬4次的樣品性能最佳,850 oC時(shí)H2為燃料,電池最大輸出功率為1496 mW/cm2,900 oC時(shí)CH4為燃料,電池最大輸出功率為379 mW/cm2,分別比浸漬前提高了142%和73%。綜上所述,PBFO及浸漬后的復(fù)合材料不僅在H2中表現(xiàn)出了良好的性能,而且在CH4中有很好的電池輸出性能,表明該材料可作為一種新型的SOFC對(duì)稱(chēng)電極材料使用。
[Abstract]:As a new energy technology, solid oxide fuel cell (SOFC) has attracted much attention because of its high energy conversion efficiency, environmental friendliness and fuel adaptability. Because the symmetric electrode material is used as the cathode and anode material of SOFC, it can not only overcome the sulfur poisoning and carbon deposition, but also reduce the components of the battery to a certain extent, and make the preparation process easier. The sintering process is reduced and the production cost of the battery is greatly reduced. In this paper, PrBaFe2O5 未 (PBFO) materials were prepared by sol-gel method. The feasibility of using PBFO as SOFC symmetric electrode was systematically studied. The results show that after sintering at 1100 OC in air for 10 h, the conductivity of pure phase structure can be obtained at 850oC, the conductivities in air and hydrogen are 25s / cm and 3.25s / cm, respectively, and the hydrogen is used as fuel. The maximum output power density of single cell is 618 MW / cm ~ (2) Ch _ 4 at 850 OC and 220 MW / cm ~ (2) at 900 OC. The good electrical and electrochemical properties indicate that PBFO is expected to be a new type of SOFC symmetric electrode material. In order to further improve the performance of PBFO symmetric electrode materials in CH4 fuel, Sm0.2Ce0.8O1.9 (SDC) impregnated and Co-Fe impregnated PBFO composites were prepared by chemical impregnation. The results show that the introduction of SDC enhances the ionic conductivity of the material, resulting in the increase of the three-phase interface, decreases the electrochemical impedance of the interface, and improves the output performance of the battery. The sample impregnated for 3 times showed the best performance of H _ 2 at 850oC and CH4 at 1170 MW / cm ~ 2900oC as fuel. The maximum output power of the battery is 380 MW / cm ~ 2, which increases the electronic conductivity of the anode part by 89% and 73% Co-Fe composite particles, respectively, and decreases the interface impedance value, and also improves the output performance of the battery. The sample impregnated for 4 times has the best performance of H _ 2 at 850oC, CH4 at 1496 MW / cm _ 2900oC and 379mW / cm ~ 2, which is 14.2% and 73.75% higher than that before impregnation, respectively. In conclusion, PBFO and impregnated composites not only have good properties in H2, but also have good battery output performance in CH4, which indicates that the composite can be used as a new type of SOFC symmetric electrode material.
【學(xué)位授予單位】：長(zhǎng)春理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TM911.4;TB33

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本文編號(hào)：2076628