High-performance, stable buffer-layer-free La0.9Sr0.1Ga0.8Mg0.2O3 electrolyte-supported solid oxide cell with a nanostructured nickel-based hydrogen electrode

IF 20.2 1区化学 Q1 CHEMISTRY, PHYSICAL Applied Catalysis B: Environmental Pub Date : 2024-01-15 DOI:10.1016/j.apcatb.2024.123742

Jiaqi Qian, Changgen Lin, Zhiyi Chen, Jiongyuan Huang, Na Ai, San Ping Jiang, Xiaoliang Zhou, Xin Wang, Yanqun Shao, Kongfa Chen

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引用次数: 0

Abstract

La_0.9Sr_0.1Ga_0.8Mg_0.2O₃ (LSGM) with an extraordinary oxygen-ion conductivity has been extensively studied as an electrolyte material for intermediate temperature solid oxide cells (SOCs). However, the conventional high-temperature sintering process of electrodes results in detrimental reaction between LSGM and Ni-based hydrogen electrode and microstructural coarsening of the electrode. Herein, a buffer-layer-free LSGM electrolyte-supported single cell with a nanostructured Ni-Gd_0.1Ce_0.9O_1.95 (GDC) electrode is developed using a sintering-free fabrication approach. The cell exhibits a peak power density of 1.23 W cm⁻² at 800 °C and an electrolysis current density of 1.85 A cm⁻² at 1.5 V with excellent operating stability. The good performance and durability is owing to the synergistic effects of the elimination of elemental interdiffusion at the electrode/electrolyte interface, polarization induced in situ formation of hetero-interfaces between Ni-GDC and LSGM, and remarkable structural stability of Ni-GDC. This study provides an innovative means for the development of efficient and durable buffer-layer-free LSGM-supported SOCs.

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采用纳米结构镍基氢电极的高性能、稳定的无缓冲层 La0.9Sr0.1Ga0.8Mg0.2O3 电解质支撑固体氧化物电池

La0.9Sr0.1Ga0.8Mg0.2O3（LSGM）具有非凡的氧离子传导性，作为中温固体氧化物电池（SOC）的电解质材料已被广泛研究。然而，传统的电极高温烧结工艺会导致 LSGM 与镍基氢气电极之间发生有害反应，并使电极的微观结构变得粗糙。在此，我们采用无烧结制造方法，开发了一种无缓冲层的 LSGM 电解质支撑单电池，其电极为纳米结构的 Ni-Gd0.1Ce0.9O1.95 (GDC)。该电池在 800 °C 时的峰值功率密度为 1.23 W cm-2，在 1.5 V 时的电解电流密度为 1.85 A cm-2，并且具有出色的工作稳定性。良好的性能和耐久性得益于消除电极/电解质界面的元素相互扩散、极化诱导 Ni-GDC 和 LSGM 之间原位形成异质界面以及 Ni-GDC 显著的结构稳定性等协同效应。这项研究为开发高效持久的无缓冲层 LSGM 支持的 SOC 提供了一种创新方法。

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来源期刊

Applied Catalysis B: Environmental 环境科学-工程：化工

CiteScore

38.60

自引率

6.30%

发文量

1117

审稿时长

24 days

期刊介绍： Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including: 1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources. 2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes. 3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts. 4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells. 5.Catalytic reactions that convert wastes into useful products. 6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts. 7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems. 8.New catalytic combustion technologies and catalysts. 9.New catalytic non-enzymatic transformations of biomass components. The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.