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首页> 外文会议>Proceedings vol.2005-07; International Symposium on Solid Oxide Fuel Cells IX(SOFC-IX) vol.2: Materials; 20050515-20; Quebec City(CA) >POWER GENERATING PROPERTY OF SOFC USING La(Sr)Ga(Mg,Fe)O_3 ELECTROLYTE COATED WITH LaGaO_3 FILM
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POWER GENERATING PROPERTY OF SOFC USING La(Sr)Ga(Mg,Fe)O_3 ELECTROLYTE COATED WITH LaGaO_3 FILM

机译：La（Sr）Ga（Mg，Fe）O_3涂有LaGaO_3膜的电解质的SOFC发电性能

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Oxide ion conductivity in La(Sr)Ga(Fe,Mg)O_3 was investigated in this study and it was found that the oxide ion conductivity much improved by doping Fe into Ga site. Although the electrical conductivity monotonically increased with increasing amount of Fe, partial electronic conduction became significant. Considering the transport number of oxide ions and conductivity, the optimum composition for oxide ion conductivity in this system is La_(0.7)Sr_(0.3)Ga_(0.7)Fe_(0.2)Mg_(0.1)O_(3-δ) (LSGFM73721). Although transport number of oxide ions is almost 0.8, extremely high power density was achieved by using LSGFM73721 as electrolyte of a SOFC. The maximum power densities of 870 and 167 mW/cm~2 were obtained at 1073 and 873 K, respectively, in spite of 0.5 mm thickness when 90Ni10Fe was used for the anode. A coating of La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_3 film on anode side of LSGFM plate was investigated by pulsed laser ablation method. Since the deposited film was not dense, open circuit potential was almost unchanged in spite of LSGM film deposition, however, power density improved much by deposition of LSGM film and the maximum power densities of 197 and 100 mW/cm~2 were achieved at 873 and 773 K respectively. This study reveals that LSGMF is a suitable electrolyte for intermediate temperature SOFCs.
机译：研究了La（Sr）Ga（Fe，Mg）O_3中的氧化物离子电导率，发现通过将Fe掺杂到Ga位置可以大大提高氧化物离子电导率。尽管电导率随Fe含量的增加而单调增加，但部分电子传导却变得很重要。考虑到氧化物离子的迁移数和电导率，该系统中氧化物离子电导率的最佳组成为La_（0.7）Sr_（0.3）Ga_（0.7）Fe_（0.2）Mg_（0.1）O_（3-δ）（LSGFM73721） 。尽管氧化物离子的传输数几乎为0.8，但是通过使用LSGFM73721作为SOFC的电解质可以实现极高的功率密度。当使用90Ni10Fe阳极时，尽管厚度为0.5 mm，但在1073和873 K时仍分别获得了870和167 mW / cm〜2的最大功率密度。通过脉冲激光烧蚀方法研究了在LSGFM板阳极侧的La_（0.9）Sr_（0.1）Ga_（0.8）Mg_（0.2）O_3薄膜的涂层。由于沉积的薄膜不致密，尽管有LSGM薄膜沉积，开路电势几乎没有变化，但是，通过沉积LSGM薄膜，功率密度得到了很大的改善，在873年达到了197和100 mW / cm〜2的最大功率密度。和773K。这项研究表明，LSMGF是中温SOFC的合适电解质。

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