全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

添加Li2O对YSZ电解质性能影响

Full-Text   Cite this paper   Add to My Lib

Abstract:

8%(摩尔分数,下同)Y2O3稳定的ZrO2(8YSZ)是固体氧化物燃料电池(SOFC)中最常用的电解质材料,本文研究了在8YSZ基体中加入n%Li2O(n=0,0.25,0.50,1.00,1.50,1.70,2.00,2.50,3.00)后(记为n%Li2OYSZ)对其晶相结构、晶格常数、烧结性能、微观形貌、电导率及其作为SOFC电解质性能的影响。结果表明,Li2O中的Li+可以固溶到YSZ的晶格内使其晶格常数减小;Li2O的加入量n<1.70时,瓷体在烧结过程中不会发生相变。加入少量的Li2O(n=0.25,0.50)可以提高YSZ的致密度和电导率,0.25%Li2OYSZ和0.50%Li2OYSZ样品800℃的电导率分别高达0.0302S/cm和0.0276S/cm,分别是纯YSZ的1.35和1.24倍;当Li2O含量n≥1.00时,相同条件下烧结体致密度随Li2O加入量的增大而逐渐减小;当n≥1.70时,样品在烧结过程中虽然出现相变,但在高于1400℃可以烧结致密,并得到纯立方相YSZ。将1250℃烧结制得的0.25%Li2OYSZ和0.50%Li2OYSZ作为SOFC电解质的单电池,800℃时的开路电压高于1.0V,说明YSZ中没有出现电子电导,具有比纯YSZ为电解质的单电池更高的性能输出,表现出了良好的应用前景。

References

[1]  ? 韩敏芳, 彭苏萍. 固体氧化物燃料电池材料及制备[M]. 北京: 科学出版社, 2004: 17–21.
[2]  ? HAN Minfang, LIU Ze, ZHOU Su, et al. Solid oxide fuel cell: materials, technology and application [J]. Eng Sci, 2010, 8(1): 32–35.
[3]  ? LEWIS G S, ATKINSON A, STEELE B C H. Cobalt additive for lowering the sintering temperature of yttria-stabilized zirconia [J]. J Mater Sci, 2001, 20: 1155–1157.
[4]  ? HAN Minfang, TANG Xiuling, YIN Huiyan, et al. Fabrication, microstructure and properties of a YSZ electrolyte for SOFCs [J]. J Power Sources, 2007, 165(2): 757–763.
[5]  ? GAO Hongbo, LIU Jiang, CHEN Hongyu, et al. The effect of Fe doping on the properties of SOFC electrolyte YSZ [J]. Solid State Ionics, 2008, 179(27–32): 1620–1624.
[6]  ? JI Yuan, LIU Jiang, ZHE Lu, et al. Study on the properties of Al2O3-doped (ZrO2)0.92(Y2O3)0.08 electrolyte [J]. Solid State Ionics, 1999, 126(3–4): 277–283.
[7]  ? KEIZER K, BURGGRAAF A J, With G. The effect of Bi2O3 on the electrical and mechanical properties of ZrO2–Y2O3 ceramics [J]. J Mater Sci, 1982, 17(4): 1095–1102.
[8]  ? Bowen C. Impedance spectroscopy of CuO-doped Y-TZP ceramics [J]. J Mater Sci, 1998, 33(21): 5103–5110.
[9]  ? SHI J L, YEN T S, SCHUBERT H. Effect of small amounts of additives on the sintering of high-purity Y-TZP [J]. J Mater Sci, 1997, 32(5): 1341–1346.
[10]  ? VAN HERLE J, VASQUEZ R. Conductivity of Mn and Ni-doped stabilized zirconia electrolyte [J]. J Eur Ceram Soc, 2004, 24(6): 1177–1180.
[11]  ? 尹衍升, 李嘉. 氧化锆陶瓷及其复合材料[M]. 北京: 化学工业出版社, 2004: 2–7.
[12]  ? GUO X, WASER R. Electrical properties of the grain boundaries of oxygen ion conductors: Acceptor-doped zirconia and ceria [J]. Prog Mater Sci, 2006, 51(2): 151–210.
[13]  ? 徐旭东, 田长安, 尹奇异, 等. 固体氧化物燃料电池电解质材料的发展趋势[J]. 硅酸盐通报, 2011, 30(3): 593–596.?
[14]  XU Xudong, TIAN Chang′an, YIN Qiyi, et al. Bull Chin Ceram Soc, 2011, 30(3): 593–596.
[15]  
[16]  ? KAWADA T, SAKAI N, YOKOKAWA H, et al. Electrical properties of transition-metal-doped YSZ [J]. Solid State Ionics, 1992, 53–56(part 1): 418–425.
[17]  ? BOWEN C, RAMESH S, GILL C, et al. Impedance spectroscopy of Cuo-doped Y-TZP ceramics [J]. J Mater Sci, 1998, 33(21): 5103–5110.
[18]  ? NICHOLAS J D, de JONGHE L C. Prediction and evaluation of sintering aids for cerium gadolinium oxide [J]. Solid State Ionics, 2007, 178(19–20): 1187–1194.
[19]  ? HAN Minfang, LIU Ze, ZHOU Su, et al. Influence of lithium oxide addition on the sintering behavior and electrical conductivity of gadolinia doped ceria [J]. J Mater Sci Technol, 2011, 27(5): 460–464.
[20]  ? NAGAEVA N, SURIN A, BLAGININA L, et al. Conductivity of zirconium oxide alloyed with lithium oxide [J]. Glass Ceram, 2008, 65(5): 199–202.
[21]  ? YAMAMURA Y, KAWASAKI S, SAKAI H. Molecular dynamics analysis of ionic conduction mechanism in yttria-stabilized zirconia [J]. Solid State Ionics, 1999, 126(1–2): 181–189.
[22]  ? ZACATE M O, MINERVINI L, BRADFIELD D J, et al. Defect cluster formation in M2O3-doped cubic ZrO2 [J]. Solid State Ionics, 2000, 128(1–4): 243–254.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133