表面修饰LSCF-GDC多相复合空气电极的高效构筑与性能优化

doi:10.15541/jim20250496

无机材料学报 ›› 2026, Vol. 41 ›› Issue (7): 965-973.DOI: 10.15541/jim20250496

表面修饰LSCF-GDC多相复合空气电极的高效构筑与性能优化

沈雪松¹(), 谢凯峰²^,³, 薛强³, 郑国柱³, 肖国萍², 陈婷³(), 陈文淼¹(), 王绍荣³

¹ 山东国创燃料电池技术创新中心有限公司, 潍坊 261061
² 中国科学院上海应用物理研究所, 上海 201800
³ 中国矿业大学化工学院, 徐州 221116

收稿日期:2025-12-14 修回日期:2026-02-26 出版日期:2026-04-03 网络出版日期:2026-04-03
通讯作者: 陈婷, 副教授. E-mail: chenting@cumt.edu.cn;
陈文淼, 教授级高级工程师. E-mail: chenwm@weichai.com
作者简介:沈雪松(1990-), 男, 博士. E-mail: shenxuesong@nctifc.com
基金资助:
国家燃料电池技术创新中心开放基金(nctifc-sq-2024-138);国家重点研发项目(2024YFF0506300);国家自然科学基金(52572283);泰山产业领军人才工程(tscx202312126);中国博士后基金(2023M743769)

High-efficiency Construction and Performance Optimization of Surface-modified LSCF-GDC Multiphase Composite Air Electrodes

SHEN Xuesong¹(), XIE Kaifeng²^,³, XUE Qiang³, ZHENG Guozhu³, XIAO Guoping², CHEN Ting³(), CHEN Wenmiao¹(), WANG Shaorong³

¹ Shandong Guochuang Fuel Cell Technology Innovation Center Co., Ltd., Weifang 261061, China
² Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
³ School of Chemical Engineering & Technology, China University of Mining and Technology, Xuzhou 221116, China

Received:2025-12-14 Revised:2026-02-26 Published:2026-04-03 Online:2026-04-03
Contact: CHEN Ting, associate professor. E-mail: chenting@cumt.edu.cn;
CHEN Wenmiao, professor. E-mail: chenwm@weichai.com
About author:SHEN Xuesong (1990-), male, PhD. E-mail: shenxuesong@nctifc.com
Supported by:
Open Fund of the National Fuel Cell Technology Innovation Center(nctifc-sq-2024-138);National Key R&D Program of China(2024YFF0506300);National Natural Science Foundation of China(52572283);Taishan Industrial Experts Program(tscx202312126);China Postdoctoral Science Foundation(2023M743769)

摘要/Abstract

摘要：

为实现可逆固体氧化物电池(RSOCs)在中低温下的高效运行, 开发高性能空气电极至关重要。本研究针对传统La_0.6Sr_0.4Co_0.2Fe_0.8O_3-_δ-Gd_0.2Ce_0.8O_3-_δ (LSCF-GDC)空气电极在中低温下氧还原反应(ORR)和氧析出反应(OER)活性不足的问题, 采用简单经济的浸渍法, 在LSCF-GDC空气电极骨架上构建纳米催化剂。通过系统优化空气电极烧结温度、催化剂种类及负载量, 确定Pr_0.5Sr_0.5CoO_3-_δ (PSC)为最优的改性催化剂。改性后对称电池在600 ℃下的极化阻抗(R_p)为0.16 Ω·cm², 较空白LSCF-GDC空气电极降低了71.4% (0.56 Ω·cm²)。这是因为PSC纳米颗粒协同优化了氧扩散、表面交换与离子传导过程, 显著提升了ORR/OER动力学。在单电池测试中, 700 ℃、燃料电池(FC)模式下的峰值功率密度为1.23 W·cm^-2, 较空白LSCF-GDC电池性能提升92.19%; FC与电解池(EC)模式下稳定性均显著增强。PSC表面修饰是全面提升LSCF-GDC空气电极综合性能的有效策略, 对推进中低温RSOCs技术发展具有重要意义。

关键词: 可逆固体氧化物电池, 空气电极, 表面修饰, Pr_0.5Sr_0.5CoO_3-_δ催化剂, 氧还原/析出反应

Abstract:

To enable the efficient operation of reversible solid oxide cells (RSOCs) at intermediate or lower temperatures, the development of high-performance air electrodes is crucial. This work addresses the insufficient oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activity of the conventional La_0.6Sr_0.4Co_0.2Fe_0.8O_3-_δ-Gd_0.2Ce_0.8O_3-_δ(LSCF-GDC) air electrode at these temperatures by constructing a nanocatalyst coating on the LSCF-GDC electrode skeleton via a simple and cost-effective infiltration method. Through systematic optimization of the sintering temperature, loading amount and type of catalysts, Pr_0.5Sr_0.5CoO_3-_δ (PSC) is confirmed as the optimal catalyst for modification. The modified symmetrical cell exhibits a polarization resistance (R_p) of 0.16 Ω·cm² at 600 ℃, 71.4% lower than that of the pristine LSCF-GDC air electrode (0.56 Ω·cm²). Relaxation time distribution analysis indicates that PSC nanoparticles significantly enhance the ORR/OER kinetics by synergistically optimizing oxygen diffusion, surface exchange, and ion transport processes. The single cell with PSC modification achieves an outstanding peak power density of 1.23 W·cm^-2 in the fuel cell (FC) mode at 700 ℃ with a 92.19% enhancement. Both FC and electrolysis cell (EC) modes modified with nano-PSC exhibit superior long-term stabilities. This study demonstrates that PSC impregnation modification is an effective strategy for comprehensively improving the overall performance of LSCF-GDC air electrodes, which is of great significance for promoting intermediate temperature RSOC technology.

Key words: reversible solid oxide cell, air electrode, surface modification, Pr_0.5Sr_0.5CoO₃ catalyst, oxygen reduction/ evolution reaction

中图分类号:

TM911

沈雪松, 谢凯峰, 薛强, 郑国柱, 肖国萍, 陈婷, 陈文淼, 王绍荣. 表面修饰LSCF-GDC多相复合空气电极的高效构筑与性能优化[J]. 无机材料学报, 2026, 41(7): 965-973.

SHEN Xuesong, XIE Kaifeng, XUE Qiang, ZHENG Guozhu, XIAO Guoping, CHEN Ting, CHEN Wenmiao, WANG Shaorong. High-efficiency Construction and Performance Optimization of Surface-modified LSCF-GDC Multiphase Composite Air Electrodes[J]. Journal of Inorganic Materials, 2026, 41(7): 965-973.

图/表 10

图1 (a) PSC、LSCF-GDC、(b) LSCF-GDC+PSC粉末混合煅烧后的XRD图谱

Fig. 1 XRD patterns of (a) PSC, LSCF-GDC, and (b) mixed LSCF-GDC+PSC powders after calcination

图2 (a) 950、(b) 1000、(c) 1050 ℃烧结的LSCF-GDC空气电极的对称电池在550~700 ℃的EIS谱图; (d)不同温度烧结的LSCF-GDC空气电极在600 ℃时的Rp

Fig. 2 EIS spectra of symmetrical cells at 550-700 ℃ with LSCF-GDC air electrode sintered at (a) 950, (b) 1000, and (c) 1050 ℃; (d) Rp at 600 ℃ for LSCF-GDC air electrode sintered at different temperatures

图3 (a) 600 ℃、空气气氛下不同PSC浸渍量的LSCF-GDC空气电极的EIS谱图; (b) 不同温度和不同浸渍量下LSCF-GDC空气电极的Rp变化曲线; (c) 600 ℃、空气气氛下经10 µL不同浸渍液修饰的LSCF-GDC空气电极的EIS谱图; (d, e) 基于EIS谱图的DRT分析; (f) PSC-LSCF-GDC和空白LSCF-GDC空气电极的O1s XPS谱图

Fig. 3 (a) EIS spectra of LSCF-GDC air electrodes with different PSC infiltration amounts in an air environment at 600 ℃; (b) Rp of LSCF-GDC air electrodes measured at different temperatures and infiltration amounts; (c) EIS spectra of LSCF-GDC air electrodes modified with 10 µL of different infiltration solutions in an air environment at 600 ℃; (d, e) DRT analysis based on EIS spectra; (f) O1s XPS spectra of PSC-LSCF-GDC and bare LSCF-GDC air electrodes

图4 (a) 600 ℃、空气气氛下PSC-LSCF-GDC与空白LSCF-GDC对称电池的Rp随时间的变化曲线; (b, c) PSC-LSCF-GDC与空白LSCF-GDC对称电池在0和120 h的(b) EIS谱图和(c) DRT曲线

Fig. 4 (a) Rp varied with time of symmetric cells with PSC-LSCF-GDC and bare LSCF-GDC air electrodes measured at 600 ℃ in air environment; (b) EIS spectra and (c) DRT curves of symmetric cells with PSC-LSCF-GDC and bare LSCF-GDC air electrodes at 0 and 120 h

图5 (a) 构型为NiO-SSZ/SSZ/GDC/LSCF-GDC的单电池横截面SEM照片; (b)空白LSCF-GDC与 (c) PSC-LSCF-GDC电极的SEM照片

Fig. 5 (a) Cross-sectional SEM image of a single cell with the configuration NiO-SSZ/SSZ/GDC/LSCF-GDC; (b, c) SEM images of (b) bare LSCF-GDC and (c) PSC-LSCF-GDC air electrodes

图6 (a~d)在550~800 ℃下, (a, c)空白LSCF-GDC和(b, d) PSC-LSCF-GDC单电池在FC模式下的(a, b) EIS谱图和(c, d) I-V-P曲线; (e)单电池在700 ℃的稳定性测试

Fig. 6 (a, b) EIS spectra and (c, d) I-V-P curves of (a, c) bare LSCF-GDC and (b, d) PSC- LSCF-GDC single cells in FC mode at 550-800 ℃; (e) Stability test of single cells at 700 ℃

图7 在600~800 ℃、50% H2O+50% H2气氛下, PSC-LSCF-GDC单电池EC模式下的(a) EIS曲线、(b) I-V曲线和(c) 700 ℃时的稳定性测试

Fig. 7 (a) EIS spectra, (b) I-V curves and (c) stability test at 700 ℃ of the single cell with PSC-LSCF-GDC air electrode in EC mode under an atmosphere of 50% H2O+50% H2 at 600-800 ℃

图S1 不同PSC浸渍量的LSCF-GDC空气电极的DRT曲线

Fig. S1 DRT curves of LSCF-GDC air electrodes with different PSC infiltration amounts

图S2 浸渍(a) 2、(b) 6、(c) 10和(d) 12 μL PSC催化剂溶液的LSCF-GDC空气电极的SEM照片

Fig. S2 SEM images of LSCF-GDC air electrodes infiltrated with (a) 2, (b) 6, (c) 10, and (d) 12 μL PSC catalyst solution

图S3 Rohm和Rp拟合的等效电路图

Fig. S3 Equivalent circuit diagram fitted with Rohm and Rp

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表面修饰LSCF-GDC多相复合空气电极的高效构筑与性能优化

High-efficiency Construction and Performance Optimization of Surface-modified LSCF-GDC Multiphase Composite Air Electrodes

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