Improved Catalytic Properties of Fluorine-Doped La0.6Sr0.4Co0.2Fe0.8O3-δ for Air Electrode with High-Performance Metal-Air Batteries

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Electronic Materials Letters Pub Date : 2024-01-31 DOI:10.1007/s13391-023-00483-8

Jiyoun Kim, Jeongah Lee, Sangwoo Kim, WooChul Jung

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Abstract

La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ (LSCF), a perovskite material, is widely recognized as an excellent catalyst for the oxygen evolution reaction (OER). An anion doping strategy was implemented to enhance the presence of highly oxidation-active O²⁻/O⁻ species crucial for the electrochemical reaction, effectively replacing oxygen. The introduction of 5 mol% fluorine to LSCF resulted in improved OER performance, comparable to that of commercial noble catalysts. Furthermore, we confirmed that fluorine-doped LSCF enhanced the oxygen reduction reaction (ORR) performance, establishing its effectiveness as a bifunctional catalyst. Moreover, when utilized as an air electrode in a homemade zinc-air battery cell, the electrochemical performance of the doped LSCF remained stable after repeated charge/discharge tests. These findings underscore the potential application of anion doping in electrochemical devices.

Graphical Abstract

Abstract Image

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用于高性能金属-空气电池空气电极的掺氟 La0.6Sr0.4Co0.2Fe0.8O3-δ 催化性能的改进

La0.6Sr0.4Co0.2Fe0.8O3-δ（LSCF）是一种过氧化物材料，被公认为是氧进化反应（OER）的优良催化剂。我们采用了阴离子掺杂策略，以增强对电化学反应至关重要的高氧化活性 O2-/O- 物种的存在，从而有效地取代氧气。在 LSCF 中引入 5 摩尔% 的氟后，OER 性能得到改善，可与商用惰性催化剂媲美。此外，我们还证实掺氟的 LSCF 提高了氧还原反应（ORR）的性能，从而确立了其作为双功能催化剂的有效性。此外，在自制锌-空气电池电池中用作空气电极时，掺杂 LSCF 的电化学性能在反复充放电测试后保持稳定。这些发现强调了阴离子掺杂在电化学设备中的潜在应用。

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来源期刊

Electronic Materials Letters 工程技术-材料科学：综合

CiteScore

4.70

自引率

20.80%

发文量

审稿时长

2.3 months

期刊介绍： Electronic Materials Letters is an official journal of the Korean Institute of Metals and Materials. It is a peer-reviewed international journal publishing print and online version. It covers all disciplines of research and technology in electronic materials. Emphasis is placed on science, engineering and applications of advanced materials, including electronic, magnetic, optical, organic, electrochemical, mechanical, and nanoscale materials. The aspects of synthesis and processing include thin films, nanostructures, self assembly, and bulk, all related to thermodynamics, kinetics and/or modeling.