In-situ nitrogen-doped carbon nanotube-encapsulated Co9S8 nanoparticles as self-supporting bifunctional air electrodes for zinc-air batteries

IF 11.2 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Materials Science & Technology Pub Date : 2024-11-01 DOI:10.1016/j.jmst.2024.09.046
Qihao Wu, Heju Gao, Jiahui Jiang, Ting Zhao, Shuai Liu, Chunyan Wu, Guancheng Xu, Li Zhang
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Abstract

A flexible air electrode with excellent activity and stability is essential for flexible zinc-air batteries. In this study, we report the rational design of nitrogen-doped carbon nanotube-encapsulated Co9S8 nanoparticles on carbon cloth (Co9S8/NCNTs/CC), serving as self-supporting air electrodes for both liquid-state and flexible zinc-air batteries. The Co9S8/NCNTs/CC-1 exhibited a half-wave potential of 0.86 V for oxygen reduction reaction (ORR) and achieved a current density of 10 mA cm−2 for oxygen evolution reaction (OER) at a voltage of only 1.52 V. The well-constructed nanotube on carbon cloth facilitates mass diffusion and electron transfer, while enhancing the mechanical flexibility of the material. Density functional theory (DFT) calculations suggested that the synergistic interaction between Co9S8 and NCNTs effectively enhanced the bifunctional electrocatalytic performance of the material. Liquid-state and flexible zinc-air batteries assembled with Co9S8/NCNTs/CC-1 demonstrated outstanding charge-discharge capabilities and long-term stability.

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原位氮掺杂碳纳米管封装 Co9S8 纳米粒子作为锌-空气电池的自支撑双功能空气电极
具有优异活性和稳定性的柔性空气电极对于柔性锌-空气电池至关重要。在本研究中,我们报告了在碳布上合理设计氮掺杂碳纳米管封装 Co9S8 纳米粒子(Co9S8/NCNTs/CC),作为液态和柔性锌-空气电池的自支撑空气电极。Co9S8/NCNTs/CC-1在氧气还原反应(ORR)中的半波电位为0.86 V,在氧气进化反应(OER)中的电压仅为1.52 V,电流密度就达到了10 mA cm-2。密度泛函理论(DFT)计算表明,Co9S8 和 NCNT 之间的协同作用有效地提高了材料的双功能电催化性能。用 Co9S8/NCNTs/CC-1 组装的液态和柔性锌-空气电池表现出卓越的充放电能力和长期稳定性。
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来源期刊
Journal of Materials Science & Technology
Journal of Materials Science & Technology 工程技术-材料科学:综合
CiteScore
20.00
自引率
11.00%
发文量
995
审稿时长
13 days
期刊介绍: Journal of Materials Science & Technology strives to promote global collaboration in the field of materials science and technology. It primarily publishes original research papers, invited review articles, letters, research notes, and summaries of scientific achievements. The journal covers a wide range of materials science and technology topics, including metallic materials, inorganic nonmetallic materials, and composite materials.
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