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燃料電池用LSGM-碳酸鹽復(fù)合電解質(zhì)材料的穩(wěn)定性
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清華大學(xué)核能與新能源技術(shù)研究院,清華大學(xué)核能與新能源技術(shù)研究院,清華大學(xué)能科樓A座314室,中國(guó)地質(zhì)大學(xué)北京工程技術(shù)學(xué)院,清華大學(xué)核能與新能源技術(shù)研究院,清華大學(xué)核能與新能源技術(shù)研究院

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國(guó)家自然科學(xué)基金項(xiàng)目（編號(hào)：U1462112）; 科技部國(guó)際合作項(xiàng)目（2013DFG41460，2013DFG60080）; 科技部973課題（編號(hào)：2012CB215401）; 科技部863課題（編號(hào)：2013AA110202）


Thermal Stability of LSGM-carbonates Composite Electrolytes for Low-temperature Solid Oxide Fuel Cells
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Institute of Nuclear and New Energy Technology,Tsinghua University,Institute of Nuclear and New Energy Technology,Tsinghua University,Institute of Nuclear and New Energy Technology,Tsinghua University,China University of Geosciences,Institute of Nuclear and New Energy Technology,Tsinghua University,Institute of Nuclear and New Energy Technology,Tsinghua University

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    摘要:

    目前研究較多的固體氧化物電池用碳酸鹽復(fù)合電解質(zhì)體系中，碳酸鹽在工作溫度下的熔融狀態(tài)使其穩(wěn)定性受到質(zhì)疑。本文通過(guò)聚丙烯酰胺溶膠凝膠法制得La0.9Sr0.1Ga0.8Mg0.2O2.85（LSGM）粉體與二元碳酸鹽復(fù)合，制備了新型LSGM-碳酸鹽復(fù)合電解質(zhì)，從老化、循環(huán)和電池輸出三方面考察了LSGM- (Li/Na)2CO3復(fù)合電解質(zhì)的穩(wěn)定性。在600℃、650 h的測(cè)試中，復(fù)合電解質(zhì)的電導(dǎo)率長(zhǎng)期穩(wěn)定在0.07~0.09 S?cm-1；在室溫~700℃循環(huán)中碳酸鹽基本沒(méi)有損失，電導(dǎo)率也較穩(wěn)定；單電池在0.6 A?cm-2恒流放電，1 h內(nèi)平均功率密度為256 mW?cm-2。

    Abstract:

    The carbonates composite electrolytes for solid oxide cells have aroused more attention. However, the thermal stability of carbonates composite electrolytes remains in doubt due to the molten state of the carbonates at operating temperature. The novel composite electrolytes were obtained by mixing LSGM powders which were synthesized by acrylamide polymerization with binary carbonates. Ageing, cycling and longtime fuel cell performance tests were used to evaluate the stability of LSGM-(Li/Na)2CO3 composite materials. The sample shows a relatively stable conductivity of 0.07-0.09 Scm-1 during a 650 h measurement in air at 600℃.The composites keep weight stable during thermal cycling below 700℃, and demonstrate a good stability after 5 thermal cycles. The cell based on LSGM-(Li/Na)2CO3 composite electrolyte delivers an average output of 256 mWcm-2 in 1h operation corresponding to the constant current density 0.6Acm-2.

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謝富丞,王誠(chéng),劉同樂(lè),付志強(qiáng),王建龍,毛宗強(qiáng).燃料電池用LSGM-碳酸鹽復(fù)合電解質(zhì)材料的穩(wěn)定性[J].稀有金屬材料與工程,2017,46(6):1699~1703.[XIE Fu-Cheng, WANG Cheng, LIU Tong-Le, FU Zhi-Qiang, WANG Jian-Long, MAO Zong-Qiang. Thermal Stability of LSGM-carbonates Composite Electrolytes for Low-temperature Solid Oxide Fuel Cells[J]. Rare Metal Materials and Engineering,2017,46(6):1699~1703.]
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  • 收稿日期:2015-02-03
  • 最后修改日期:2015-11-20
  • 錄用日期:2015-12-08
  • 在線發(fā)布日期: 2017-11-07
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