|本期目录/Table of Contents|

[1]孙建强,黄志良*,商海鑫,等.锶掺杂磷灰石型硅酸镧固体电解质的电导性能[J].武汉工程大学学报,2025,47(06):621-628.[doi:10.19843/j.cnki.CN42-1779/TQ.202312030]
 SUN Jianqiang,HUANG Zhiliang*,SHANG Haixin,et al.Electrical conductivity of strontium-doped apatite-type lanthanum silicate solid electrolyte[J].Journal of Wuhan Institute of Technology,2025,47(06):621-628.[doi:10.19843/j.cnki.CN42-1779/TQ.202312030]
点击复制

锶掺杂磷灰石型硅酸镧固体电解质的电导性能(/HTML)
分享到:

《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
47
期数:
2025年06期
页码:
621-628
栏目:
现代大化工
出版日期:
2025-12-31

文章信息/Info

Title:
Electrical conductivity of strontium-doped apatite-type lanthanum silicate solid electrolyte
文章编号:
1674 - 2869(2025)06 - 0621 - 08
作者:
孙建强黄志良*商海鑫田晓凤王棋昌
武汉工程大学材料科学与工程学院,湖北 武汉 430205
Author(s):
SUN JianqiangHUANG Zhiliang*SHANG HaixinTIAN XiaofengWANG Qichang
School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan 430205,China

关键词:
尿素-硝酸盐燃烧法氧离子导体硅酸镧固体电解质电导机理
Keywords:
urea-nitrate combustion methodoxygen ion conductorlanthanum silicate solid electrolyteconduction mechanism
分类号:
O646
DOI:
10.19843/j.cnki.CN42-1779/TQ.202312030
文献标志码:
A
摘要:
磷灰石型硅酸镧固体电解质(La9.33Si6O26,LSO)因其离子电导率高、密度大而被广泛应用于固体氧化物燃料电池电解质领域。采用尿素-硝酸盐燃烧法在600 ℃成功制备出锶(Sr)掺杂磷灰石型硅酸镧固体电解质La9.33-xSrxSi6O26-0.5x(x=0.0,0.1,0.3,0.5,0.7,0.9)。在不同温度(600~900 ℃)下煅烧硅酸镧电解质12 h,通过X射线衍射(XRD)和傅里叶变换红外光谱(FTIR)等表征方法确定最佳煅烧温度为800 ℃。通过XRD、扫描电子显微镜(SEM)和X射线光电子能谱(XPS)等表征方法研究Sr单掺对硅酸镧电解质晶体结构、致密度和电化学性能的影响。同时在640 ℃时,利用电化学阻抗(EIS)测试阻抗并分析其电导性能,结果显示,当x=0.3时,硅酸镧电导率最高,达到1.42×10-3 S/cm。本文揭示了氧离子空位-阳离子空位浓度协同增强电导机理。
Abstract:
Apatite-type lanthanum silicate solid electrolyte (La9.33Si6O26,LSO) is widely used as an electrolyte in solid oxide fuel cells due to its high ionic conductivity and excellent density. In this study,Sr-doped apatite-type lanthanum silicate solid electrolytes with the composition La9.33-xSrxSi6O26-0.5x(x=0.0,0.1,0.3,0.5,0.7,0.9) were successfully synthesized at 600 ℃ via the urea-nitrate combustion method. The lanthanum silicate electrolytes were calcined at different temperatures (600-900 ℃) for 12 hours. Characterization by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) indicated that the optimal calcination temperature was 800 ℃. The influence of single Sr doping on the crystal structure,densification behavior and electrochemical performance of the electrolyte was systematically investigated using XRD,scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Electrochemical impedance spectroscopy (EIS) measurements performed at 640 ℃ revealed that the composition with x=0.3 exhibited the highest ionic conductivity of 1.42×10-3 S/cm. Based on these results,a conduction mechanism involving the synergistic enhancement of conductivity through oxygen ion and cation vacancies was proposed.

参考文献/References:

[1] CACCIOLA G,ANTONUCCI V,FRENI S. Technology up date and new strategies on fuel cells [J]. Journal of Power Sources,2001,100(1/2):67-79.
[2] STOLTEN D, EMONTS B. Fuel cell science and engineering:materials,processes,systems and technology [J]. Plantinum Metals Review,2013,57(1):66-69.
[3] 孙公权,衣宝廉.21世纪最理想的发电技术之一——燃料电池 [J]. 中国科学:化学,2011,41(12):1775-1776.
[4] MISSO A M,ELIAS D R,dos SANTOS F,et al. Low temperature synthesis of lanthanum silicate apatite type by modified sol gel process [J]. Advanced Materials Research,2014,975:143-148.
[5] SANSOM J E H, RICHINGS D, SLATER P R. A powder neutron diffraction study of the oxide-ion-conducting apatite-type phases,La9. 33Si6O26 and La8Sr2Si6O26 [J]. Solid State Ionics,2001,139(3/4):205-210.
[6] ZHAO Y Q,DAI L, HE Z X, et al. Synthesis and characterization of Ba2+ and W6+ co-doped apatite-type lanthanum silicate electrolytes [J]. Ceramic International,2020,46(4):5420-5429.
[7] CéLéRIER S,LABERTY C,ANSART F,et al. New chemical route based on sol-gel process for the synthesis of oxyapatite La9. 33Si6O26 [J]. Ceramic International,2006,32(3):271-276.
[8] YADAV A,JHA P A,JHA P K,et al. Influence of ionic radii on the conduction mechanism in lanthanum silicate oxyapatite [J]. Materials Chemistry and Physics,2023,297:127444.
[9] 张密林,王贵领,赵辉,等.氧基磷灰石离子导体的研究进展[J].黑龙江大学自然科学学报,2005,22(5):593-601.
[10] SHANG H X ,HUANG Z L. Enhanced electrical conductivity of P-doped apatite-type lanthanum silicate solid electrolytes and analysis of the mechanism [J]. Ionics,2023,29(10):4013-4024.
[11] NOVIYANTI A R,JULIANDRI J,AGUSTINA S U,et al. Influence of synthesis time on lanthanum silicate apatite (La9.33Si6O26) properties [J]. Research Journal of Chemistry and Environment,2018,22(2):120-123.
[12] 姜媛,黄志良,陈常连,等.铝掺杂磷灰石型硅酸镧电解质的电导机理[J].武汉工程大学学报,2022,44(1):48-54.
[13] 韩炳旭,王岭,戴磊,等. 磷灰石型硅酸镧基氧离子导体研究进展[J].功能材料,2013,44(增刊1):21-27.
[14] 赵艳琴,闫书山,王岭,等. Ba2+和In3+共掺杂硅酸镧固体电解质的制备及性能[J].无机盐工业,2020,52(1):49-53.
[15] 田立朋,任志华.磷灰石结构硅酸镧氧离子导体的研究进展[J].材料导报,2012,26(增刊2):216-219.
[16] LI J,CAI Q,HORRI B A. Synthesis and densification of Mo/Mg co-doped apatite-type lanthanum silicate electrolytes with enhanced ionic conductivity [J]. Chemistry:A European Journal,2023,29(25):e202300021.
[17] McFARLANE J, BARTH S, SWAFFER M, et al. Synthesis and conductivities of the apatite-type systems,La9.33+xSi6-yMyO26+z(M=Co,Fe,Mn) and La8Mn2Si6O26 [J]. Ionics,2002,8(1/2):149-154.

相似文献/References:

备注/Memo

备注/Memo:
收稿日期:2023-12-29
基金项目:国家自然科学基金(51374155,51242010);湖北省科技支撑计划(2014BCB034);武汉工程大学研究生教育创新基金(CX2022228)
作者简介:孙建强,硕士研究生。Email:qiangsj@126.com
*通信作者:黄志良,博士,教授。Email:hzl6455@126.com
更新日期/Last Update: 2026-01-05