为可充电锌-空气电池合成灵活而坚固的氧电催化剂的热蒸发-捕集策略

IF 32.4 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Energy & Environmental Science Pub Date : 2024-10-19 DOI:10.1039/d4ee03005b

Hong-Bo Zhang, Yu Meng, Lingzhe Fang, Fei Yang, Shangqian Zhu, Tao Li, Xiaohua Yu, Ju Rong, Weiwei Chen, Dong Su, Yi Mei, Peng-Xiang Hou, Chang Liu, Minhua Shao, Jin-Cheng Li

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引用次数: 0

摘要

人们一直致力于开发双功能电催化剂，以加速锌-空气电池（ZAB）中缓慢的阴极氧还原/进化反应（ORR/OER）动力学。在此，我们报告了一种热蒸发-捕集协同策略，用于制造同时负载氧化钴纳米颗粒和单原子 Co/Fe-Nx 位点的柔性 N 掺杂碳纤维布双功能电催化剂，其中热蒸发过程既能缩小氧化钴纳米颗粒的尺寸，又能捕集蒸发的 Co/Fe 物种以生成 Co/Fe-Nx 位点。所获得的柔性电催化剂可直接用作氧电极，其 OER/ORR 电位间隙小至 0.542 V，峰值功率密度大（液态 ZAB：237.4 mW cm-2；固态 ZAB：141.1 mW cm-2），充放电循环稳定性极佳，1000 次循环后无衰减。此外，原位拉曼光谱表征显示，CoFe2O4 物种是 OER 催化的主要成分。

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Thermal Evaporating-Trapping Strategy to Synthesize Flexible and Robust Oxygen Electrocatalysts for Rechargeable Zinc-Air Batteries

Great efforts have been devoted to the development of bifunctional electrocatalysts to accelerate the sluggish kinetics of cathodic oxygen reduction/evolution reactions (ORR/OER) in zinc–air batteries (ZABs). Here we report a thermal evaporating-trapping synergistic strategy to fabricate bifunctional electrocatalyst of flexible N-doped carbon fiber cloth loaded with both CoFe-oxide nanoparticles and single-atom Co/Fe-Nx sites, in which the thermal evaporation process functions in both downsizing CoFe-oxide nanoparticles and trapping the evaporated Co/Fe species to generate Co/Fe-Nx sites. The obtained flexible electrocatalyst, directly served as an oxygen electrode, displays a small potential gap of 0.542 V for OER/ORR, large peak power densities (liquid-state ZAB: 237.4 mW cm–2; solid-state ZAB: 141.1 mW cm-2), and excellent charge-discharge cycling stability without decay after 1000 cycles. Furthermore, in situ Raman spectroscopy characterization reveals that CoFe2O4 species is responsible for the OER catalysis.

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来源期刊

Energy & Environmental Science 化学-工程：化工

CiteScore

50.50

自引率

2.20%

发文量

349

审稿时长

2.2 months

期刊介绍： Energy & Environmental Science, a peer-reviewed scientific journal, publishes original research and review articles covering interdisciplinary topics in the (bio)chemical and (bio)physical sciences, as well as chemical engineering disciplines. Published monthly by the Royal Society of Chemistry (RSC), a not-for-profit publisher, Energy & Environmental Science is recognized as a leading journal. It boasts an impressive impact factor of 8.500 as of 2009, ranking 8th among 140 journals in the category "Chemistry, Multidisciplinary," second among 71 journals in "Energy & Fuels," second among 128 journals in "Engineering, Chemical," and first among 181 scientific journals in "Environmental Sciences." Energy & Environmental Science publishes various types of articles, including Research Papers (original scientific work), Review Articles, Perspectives, and Minireviews (feature review-type articles of broad interest), Communications (original scientific work of an urgent nature), Opinions (personal, often speculative viewpoints or hypotheses on current topics), and Analysis Articles (in-depth examination of energy-related issues).