应用化学 ›› 2022, Vol. 39 ›› Issue (5): 797-808.DOI: 10.19894/j.issn.1000-0518.210148
收稿日期:
2021-03-26
接受日期:
2021-07-19
出版日期:
2022-05-01
发布日期:
2022-05-24
通讯作者:
朱晓飞,周德凤
基金资助:
Yu MENG, Qing ZHANG, Wen-Hao PENG, Xiao-Fei ZHU(), De-Feng ZHOU()
Received:
2021-03-26
Accepted:
2021-07-19
Published:
2022-05-01
Online:
2022-05-24
Contact:
Xiao-Fei ZHU,De-Feng ZHOU
About author:
defengzhou65@126.comSupported by:
摘要:
采用溶胶凝胶法制备单相Pr0.8Sr0.2Fe0.7Ni0.3O3-δ (PSFN113)和Pr1.2Sr0.8Ni0.6Fe0.4O4+δ (PSNF214),并将二者以3∶7的质量比固态混合制备PSFN113-PSNF214异质复合阴极,系统地研究异质界面的存在对样品的结构和性能的影响,并评估PSFN113-PSNF214复合材料作为中温固体氧化物燃料电池(IT-SOFC)阴极的潜力。结果表明,异质复合材料的两相间具有良好的化学稳定性和热稳定性,与Ce0.8Gd0.2O1.9(GDC)电解质具有良好的兼容性和界面粘附性,具有长期运行稳定性。PSNF113加入到PSFN214中形成异质结构,可提高氧空位含量,改善PSFN113的氧离子传输。两相颗粒紧密缠绕以最大化形成异质界面,提高比表面积。800 ℃时,PSFN113-PSNF214的极化电阻值为0.053 Ω·cm2,仅为PSFN113的41%和PSNF214的61%;相应单电池的最大功率密度为496.80 mW/cm2,高达PSFN113的2.5倍和PSNF214的1.6倍。60 h长期稳定性测试的电压衰减率仅为0.07%/h。因此,PSFN113-PSNF214异质复合阴极优异的性能和杰出的稳定性,使其可作为IT-SOFC阴极的候选材料。
中图分类号:
孟玉, 张晴, 彭文浩, 朱晓飞, 周德凤. Pr0.8Sr0.2Fe0.7Ni0.3O3-δ -Pr1.2Sr0.8Ni0.6Fe0.4O4+δ 复合阴极的制备及其电化学性能[J]. 应用化学, 2022, 39(5): 797-808.
Yu MENG, Qing ZHANG, Wen-Hao PENG, Xiao-Fei ZHU, De-Feng ZHOU. Preparation and Electrochemical Performance of Pr0.8Sr0.2Fe0.7Ni0.3O3-δ ⁃Pr1.2Sr0.8Ni0.6Fe0.4O4+δ Composite Cathode[J]. Chinese Journal of Applied Chemistry, 2022, 39(5): 797-808.
图1 (A)所有样品的XRD图; (B)不同煅烧温度下,PSFN113-PSNF214的XRD图; (C)PSFN113-PSNF214与GDC的XRD图; (D)NiO与GDC的XRD图
Fig.1 (A) XRD patterns of all samples; (B) XRD patterns of PSFN113-PSNF214 at different calcination temperatures; (C) XRD patterns of PSFN113-PSNF214 and GDC; (D) XRD patterns of NiO and GDC
图3 (A)PSFN113、(B)PSNF214和(C)PSFN113-PSNF214粉末的FE-SEM图及(D)样品的N2吸附解吸曲线
Fig.3 FE-SEM images of (A) PSFN113, (B) PSNF214, (C) PSFN113-PSNF214 powders and (D) N2 adsorption desorption curves of all samples
图4 PSFN113-PSNF214异质复合阴极的(A)TEM图像、(B)HR-TEM图像(黄色实线表示PSFN113和PSNF214之间的界面)和(C)性能提升机理图
Fig.4 (A) Bright field TEM image, (B) HR-TEM image and (C) Performance improvement mechanism diagram of PSFN113-PSNF214 heterogeneous composite cathode (the yellow solid line represents the interface between PSFN113 and PSNF214)
阴极 Cathode | PSFN113 | PSNF214 | PSFN113?PSNF214 |
---|---|---|---|
Olattice | 22.1% | 16.6% | 9.3% |
Osurface | 77.9% | 83.4% | 90.7% |
Pr4+ | 75.2% | 75.5% | 70.3% |
Pr3+ | 24.8% | 24.5% | 29.7% |
Fe4+ | 54.7% | 63.0% | 62.8% |
Fe3+ | 45.3% | 37.0% | 37.2% |
Ni3+ | 15.8% | 11.8% | 10.3% |
Ni2+ | 84.2% | 88.2% | 89.7% |
表1 从XPS光谱分析中获得的相关元素含量
Table 1 Contents of relevant elements obtained from XPS spectrum analysis
阴极 Cathode | PSFN113 | PSNF214 | PSFN113?PSNF214 |
---|---|---|---|
Olattice | 22.1% | 16.6% | 9.3% |
Osurface | 77.9% | 83.4% | 90.7% |
Pr4+ | 75.2% | 75.5% | 70.3% |
Pr3+ | 24.8% | 24.5% | 29.7% |
Fe4+ | 54.7% | 63.0% | 62.8% |
Fe3+ | 45.3% | 37.0% | 37.2% |
Ni3+ | 15.8% | 11.8% | 10.3% |
Ni2+ | 84.2% | 88.2% | 89.7% |
图6 对称电池的电化学阻抗谱:(A)500 ℃, (B)600 ℃, (C)700 ℃, (D)800 ℃; (E)极化电阻随温度的变化曲线及(F)相应的Arrhenius曲线
Fig.6 Electrochemical impedance spectra of symmetrical cells: (A) 500 ℃, (B) 600 ℃, (C) 700 ℃, (D) 800 ℃; (E) The change curves of polarization resistance with temperature and (F) the corresponding Arrhenius curves
图7 EIS测试后,以(A)PSFN113、 (B)PSNF214和(C)PSFN113-PSNF214作为阴极的对称电池的横截面SEM图
Fig.7 Cross-sectional SEM images of symmetrical cells with (A) PSFN113, (B) PSNF214 and (C) PSFN113-PSNF214 cathode after EIS test
图8 单电池的I?V?P曲线:(A)500 ℃、(B)600 ℃、(C)700 ℃和(D)800 ℃下I-V曲线;(E)功率密度随温度的变化曲线;(F)以PSFN113-PSNF214为阴极构建的单电池的长期稳定性测试图
Fig.8 I?V?P curves of single cells: I-V curves at (A) 500 ℃, (B) 600 ℃, (C) 700 ℃, (D) 800 ℃; (E) Power density change curves with temperature; (F) Long-term stability test curve of a single cell constructed with PSFN113-PSNF214 cathode
阴极 Cathode | 电池构造 Cell configuration | 最大功率密度 PPD/(W·cm-2) | 温度 Temperature/℃ | 参考文献 Reference |
---|---|---|---|---|
*Nd0.5Ba0.5Fe0.9Co0.1O3-δ | Ni?BCZD/BCZD/NBFCo | 390 | 700 | |
La0.3Sr0.7Ti0.3Fe0.70O3-δ | LSTF/SDC/YSZ/SDC/LSTF | 374 | 900 | |
*Nd1.7Ca0.3NiO4+δ | NiO?GDC/GDC/GDC?Nd1.7Ca0.3NiO4 | 188 | 800 | |
*La1.5Pr0.5Ni0.8Co0.2O4+δ | LPNCO/CGD/YSZ/Ni?YSZ | 385 | 700 | |
*Pr2Ni0.5Mn0.5O4-δ | NiO?YSZ/YSZ/GDC/PNM | 485 | 800 | |
*Bi0.5Ba0.5FeO3-δ ?Ba(Zr0.1Ce0.7Y0.2)O3 | NiO?BZCY/BZCY/BBFO?BZCY | 120 | 700 | |
Ba0.5Sr0.5Co0.8Fe0.2O3-δ ?Ce0.8Sm0.2O2-δ | LSCF?SDC/SDC/YSZ/SDC/BSCF?SDC | 290 | 850 | |
Pr2NiO4?40%Sm0.2Ce0.8O1.9 | PNO?40SDC/SDC/PNO?40SDC | 375 | 800 | |
La0.6Sr0.4Co0.2Fe0.8O3-δ ?Gd0.1Ce0.9O2-δ | SNNV10?GDC/GDC/LSCF?GDC | 280 | 650 | |
La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ ?Gd0.1Ce0.9O2-δ | LSCFN?GDC/GDC/YSZ/GDC/LSCFN?GDC | 348 | 850 | |
PSFN113-214(5∶5) | NiO?GDC/GD C/PSFN113-214(5∶5) | 496.80 | 800 | This work |
表2 文献中报道的不同阴极材料单电池的最大功率密度比较总结
Table 2 Comparison and summary of the maximum power density of single cells with different cathode materials reported in the literature
阴极 Cathode | 电池构造 Cell configuration | 最大功率密度 PPD/(W·cm-2) | 温度 Temperature/℃ | 参考文献 Reference |
---|---|---|---|---|
*Nd0.5Ba0.5Fe0.9Co0.1O3-δ | Ni?BCZD/BCZD/NBFCo | 390 | 700 | |
La0.3Sr0.7Ti0.3Fe0.70O3-δ | LSTF/SDC/YSZ/SDC/LSTF | 374 | 900 | |
*Nd1.7Ca0.3NiO4+δ | NiO?GDC/GDC/GDC?Nd1.7Ca0.3NiO4 | 188 | 800 | |
*La1.5Pr0.5Ni0.8Co0.2O4+δ | LPNCO/CGD/YSZ/Ni?YSZ | 385 | 700 | |
*Pr2Ni0.5Mn0.5O4-δ | NiO?YSZ/YSZ/GDC/PNM | 485 | 800 | |
*Bi0.5Ba0.5FeO3-δ ?Ba(Zr0.1Ce0.7Y0.2)O3 | NiO?BZCY/BZCY/BBFO?BZCY | 120 | 700 | |
Ba0.5Sr0.5Co0.8Fe0.2O3-δ ?Ce0.8Sm0.2O2-δ | LSCF?SDC/SDC/YSZ/SDC/BSCF?SDC | 290 | 850 | |
Pr2NiO4?40%Sm0.2Ce0.8O1.9 | PNO?40SDC/SDC/PNO?40SDC | 375 | 800 | |
La0.6Sr0.4Co0.2Fe0.8O3-δ ?Gd0.1Ce0.9O2-δ | SNNV10?GDC/GDC/LSCF?GDC | 280 | 650 | |
La0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ ?Gd0.1Ce0.9O2-δ | LSCFN?GDC/GDC/YSZ/GDC/LSCFN?GDC | 348 | 850 | |
PSFN113-214(5∶5) | NiO?GDC/GD C/PSFN113-214(5∶5) | 496.80 | 800 | This work |
图9 (A)长期稳定性测试前后阴极XRD对比图; (B)测试前复合阴极粉末SEM图; (C)测试前复合阴极粉末SEM图
Fig.9 (A) Comparison of cathode XRD images before and after long-term stability test; (B) SEM image of heterogeneous composite cathode powder before test; (C) SEM image of heterogeneous composite cathode powder after test
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