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一步法合成La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ-Gd0.2Ce0.8O2-δ對(duì)稱電極應(yīng)用于SOFC性能研究
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1.吉林師范大學(xué);2.南京理工大學(xué)

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國(guó)家自然科學(xué)基金資助(51702163);吉林省發(fā)展和改革委員會(huì)產(chǎn)業(yè)技術(shù)研究與開(kāi)發(fā)項(xiàng)目(2020C026-4);吉林省教育廳“十三五”科學(xué)技術(shù)研究項(xiàng)目(JJKH20200423KJ);吉林師范大學(xué)博士啟動(dòng)項(xiàng)目(2018009)


Co-synthesis of La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ-Gd0.2Ce0.8O2-δ symmetrical electrode for SOFC performance study
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1.Jilin Normal University;2.Nanjing University Of Science And Technology

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    摘要:

    一步法合成La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ-Gd0.2Ce0.8O2-δ(LSCFN-CGO)混合電導(dǎo)對(duì)稱電極,并采用La0.8Sr0.2Ga0.83Mg0.17O3-δ(LSGM)作為電解質(zhì)制備了結(jié)構(gòu)為L(zhǎng)SCFN-CGO||LSGM||LSCFN-CGO的對(duì)稱電池。分別使用X射線衍射儀(XRD)和掃描電子顯微鏡(SEM)對(duì)LSCFN-CGO粉體物相及電極微觀結(jié)構(gòu)進(jìn)行分析。一步法制得的LSCFN-CGO電極粉體為純相,LSCFN鈣鈦礦相與CGO螢石相具備極好的化學(xué)相容性,且燒結(jié)得到了良好微觀結(jié)構(gòu)的對(duì)稱電極。采用H2(3% H2O),C3H8(3% H2O)為燃料氣測(cè)試電池性能,850 ℃電池最大功率密度可分別達(dá)980 mW/cm2 和 869 mW/cm2。穩(wěn)定性測(cè)試在C3H8(3% H2O)氣氛中0.3 A/cm2的恒流放電條件下進(jìn)行,全程共420 h,衰減較小,期間進(jìn)行8次電極氧化還原循環(huán),對(duì)稱電極具有理想的碳基燃料下氧化還原再生能力。實(shí)驗(yàn)結(jié)果表明采用一步法合成混合電導(dǎo)電極是一種簡(jiǎn)便、優(yōu)化的電極制備方法,具有廣闊的應(yīng)用前景。

    Abstract:

    In this paper, one step method was investigated to prepare La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ-Gd0.2Ce0.8O2-δ (LSCFN-CGO) compound symmetrical electrode, La0.8Sr0.2Ga0.83Mg0.17O3-δ (LSGM) was used as electrolyte and symmetrical cells with a con?guration of LSCFN-CGO||LSGM||LSCFN-CGO were successfully fabricated. Phase-analysis and electrode microstructure of LSCFN-CGO were examined by X-ray diffraction (XRD) and scanning electron microscopy (SEM). LSCFN-CGO was identified to be pure phase and perovskite structured LSCFN chemically compatible with ?uorite structured CGO. Using H2 (3% H2O) and C3H8 (3% H2O) as fuel for the cell, the maximum power densities were 980 mW/cm2 and 869 mW/cm2 at 850 ℃. Moreover, the long-term stability of the cell is demonstrated to be stable for 420 h under constant current of 0.3 A/cm2 using C3H8 (3% H2O) as fuel, 8 redox cycles were carried out, and the symmetrical electrode had ideal redox regeneration ability under carbon-based fuel. Results show that, one step method is a facile and optimized electrode fabrication procedure and owns promising application prospects.

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徐娜,朱騰龍,孫夢(mèng)真,耿多,徐占林.一步法合成La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ-Gd0.2Ce0.8O2-δ對(duì)稱電極應(yīng)用于SOFC性能研究[J].稀有金屬材料與工程,2021,50(3):995~999.[Xu Na, Zhu Teng-long, Sun Meng-zhen, Geng Duo, Xu Zhan-lin. Co-synthesis of La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ-Gd0.2Ce0.8O2-δ symmetrical electrode for SOFC performance study[J]. Rare Metal Materials and Engineering,2021,50(3):995~999.]
DOI:10.12442/j. issn.1002-185X.20200268

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  • 收稿日期:2020-04-23
  • 最后修改日期:2020-06-18
  • 錄用日期:2020-06-30
  • 在線發(fā)布日期: 2021-04-02
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