A flexible porous electrospun carbon nanofiber cathode catalyst for rechargeable liquid and flexible Zn-air batteries

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon Pub Date : 2025-04-28 DOI:10.1016/j.carbon.2025.120372

Fei Yang, Haixia Su, Yunqin Yang, Zhaodi Shen, Chun Zhang, Linwei Zhang

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Abstract

Exploring flexible, porous, efficient, and stable cathodic electrocatalysts is crucial for the development of ZABs. In this study, an effective porous and flexible carbon nanofiber catalyst (Fe-ZCNF) was successfully constructed via electrospinning. PAN was used as the spinning substrate material, and hemin was incorporated to create the main active sites, while a NaCl molten salt-assisted ZIF-8 templating strategy was employed to form a connected pore structure. The Fe-ZCNF possesses an interconnected hierarchical porous structure and a high specific surface area of 1035.5 m² g⁻¹. Compared with commercial Pt/C (20 wt%), the E_1/2 = 0.88 V vs. RHE for ORR of Fe-ZCNF shifted positively by 20 mV, and a significant improvement in stability was observed. The ZABs assembled using Fe-ZCNF as the cathode exhibits excellent performance, with an OCV of 1.59 V and a power density of 179.2 mW cm⁻², which are superior to those of Pt/C + RuO₂, along with a cycling stability of up to 200 h. Additionally, Fe-ZCNF can be used as the air cathode for FZABs, demonstrating high specific capacity and good cycling stability under different bending conditions. This work provides valuable insights into the design of flexible catalysts, potentially advancing the development of flexible electronic devices.

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用于可充电液体电池和柔性锌空气电池的柔性多孔电纺碳纳米纤维阴极催化剂

探索柔性、多孔、高效、稳定的阴极电催化剂对ZABs的发展至关重要。在本研究中，通过静电纺丝成功构建了一种有效的多孔柔性碳纳米纤维催化剂（Fe-ZCNF）。以PAN为纺丝基底材料，加入hemin形成主要活性位点，采用NaCl熔盐辅助ZIF-8模板策略形成连接孔结构。Fe-ZCNF具有相互连接的分层多孔结构和1035.5 m2 g−1的高比表面积。与商业Pt/C （20 wt%）相比，Fe-ZCNF的ORR的E1/2 = 0.88 V vs. RHE正移动了20 mV，稳定性显著提高。以Fe-ZCNF为阴极组装的ZABs具有优异的性能，其OCV为1.59 V，功率密度为179.2 mW cm−2，优于Pt/C + RuO2，循环稳定性长达200 h。此外，Fe-ZCNF可作为FZABs的空气阴极，在不同弯曲条件下具有较高的比容量和良好的循环稳定性。这项工作为柔性催化剂的设计提供了有价值的见解，有可能推动柔性电子器件的发展。

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来源期刊

Carbon 工程技术-材料科学：综合

CiteScore

20.80

自引率

7.30%

发文量

审稿时长

23 days

期刊介绍： The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.