Incorporating ceramic nanorods into nanofiber cathodes for efficient solid oxide fuel cells through smart suspension infiltration

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-09-11 DOI:10.1016/j.jeurceramsoc.2025.117815

Zhiyi Chen , Quan Liu , Shuai Luo , Jiongyuan Huang , Jiaqi Qian , Dong Tian , Na Ai , Chengzhi Guan , Pei Yuan , San Ping Jiang , Kongfa Chen

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引用次数: 0

Abstract

Direct incorporation of pre-synthesized ceramic nanoparticles into porous scaffolds offers a simplified process for constructing a nanostructured electrode with precisely controlled composition and morphology for solid oxide fuel cells. However, the homogeneous distribution of ceramic nanoparticles in the scaffolds remains a critical challenge. Herein, we address the challenge by incorporating ultrafine Gd_0.1Ce_0.9O_1.95 (GDC) nanorods into a highly porous La_0.8Sr_0.2MnO_3+δ (LSM) nanofiber scaffolds. The porous morphology of the LSM nanofibers is preserved in the scaffolds through ultrasonic dispersion and drip coating. The GDC nanorods, synthesized by a polyethylene glycol-assisted hydrothermal method, exhibit abundant surface oxygen vacancies. The GDC nanorods are evenly dispersed within the nanofiber scaffolds during infiltration of the aqueous ceramic suspension. A single cell with the GDC-LSM cathode demonstrates a peak power density of 1.2 W cm^–2 at 800 °C with excellent operational stability over 100 h. This work provides a strategy for developing efficient, durable nanocomposite cathodes.

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通过智能悬浮渗透将陶瓷纳米棒整合到纳米纤维阴极中，用于高效固体氧化物燃料电池

将预先合成的陶瓷纳米颗粒直接掺入多孔支架中，为固体氧化物燃料电池构建具有精确控制成分和形态的纳米结构电极提供了一种简化的过程。然而，陶瓷纳米颗粒在支架中的均匀分布仍然是一个关键的挑战。在此，我们通过将超细Gd0.1Ce0.9O1.95 （GDC）纳米棒结合到高孔La0.8Sr0.2MnO3+δ (LSM)纳米纤维支架中来解决这一挑战。通过超声分散和滴涂，使LSM纳米纤维的多孔形态在支架中得以保留。采用聚乙二醇辅助水热法制备的GDC纳米棒具有丰富的表面氧空位。在水相陶瓷悬浮液的渗透过程中，GDC纳米棒均匀地分散在纳米纤维支架内。使用GDC-LSM阴极的单个电池在800°C时的峰值功率密度为1.2 W cm-2，在100 h以上具有出色的工作稳定性。这项工作为开发高效、耐用的纳米复合阴极提供了一种策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.