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

• 研究论文 •

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
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,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 Kaifeng^2,3, 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. China University of Mining and Technology, Xuzhou 221116, China

Received:2025-12-14 Revised:2026-02-26
Contact: CHEN Ting, associate professor. E-mail: chenting@cumt.edu.cn; CHEN Wenmiao,professor. E-mail: chenwm@weichai.com
About author:SHEN Xuesong. 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(RSOC)在中低温高效运行,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RSOC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 nano-catalyst 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 (DRT) analysis indicates that PSC nanoparticles significantly enhanced 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 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 cells, 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, DOI: 10.15541/jim20250496.

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, DOI: 10.15541/jim20250496.

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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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