钴纳米粒子修饰的空心氮掺杂碳纳米纺锤使高性能锂氧电池成为可能。

IF 9.4 1区 化学 Q1 CHEMISTRY, PHYSICAL
Journal of Colloid and Interface Science Pub Date : 2025-04-01 Epub Date: 2024-12-17 DOI:10.1016/j.jcis.2024.12.104
Xueyun Yang, Jianhao Zhu, Yingli Wang, Jiacun Wang, Yajuan Li, Yuanxiang Gu, Qingliang Lv, Lei Wang
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引用次数: 0

摘要

尽管具有超高的理论能量密度和成本效益,但非质子锂氧(Li-O2)电池的阴极氧氧化还原动力学缓慢,电压滞后较大。在这里,我们精心设计了由n掺杂的介孔空心碳纳米纺锤(Co@HCNs)负载的超细Co纳米颗粒作为Li-O2电池的高效电催化剂。得益于强大的金属支撑相互作用,获得的Co@HCNs对LiO2中间体表现出高亲和力,促进在Co@HCNs阴极表面形成具有低阻抗接触界面的超薄纳米片状Li2O2,有利于充电时的可逆分解。介孔中空纳米纺锤体可以提供丰富的电子/离子传递通道,协同加速放电产物的形成和分解。基于Co@HCNs的锂离子电池的充放电极化明显降低至0.92 V,倍率性能令人印象深刻,可稳定运行250次。这项工作将为高性能锂氧电池的先进氧电催化剂的设计提供新的途径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Cobalt nanoparticles decorated hollow N-doped carbon nanospindles enable high-performance lithium-oxygen batteries.

Despite the ultrahigh theoretical energy density and cost-effectiveness, aprotic lithium-oxygen (Li-O2) batteries suffer from slow oxygen redox kinetics at cathodes and large voltage hysteresis. Here, we well-design ultrafine Co nanoparticles supported by N-doped mesoporous hollow carbon nanospindles (Co@HCNs) to serve as efficient electrocatalysts for Li-O2 battery. Benefiting from strong metal-support interactions, the obtained Co@HCNs manifest high affinity for the LiO2 intermediate, promoting formation of ultrathin nanosheet-like Li2O2 with low-impedance contact interface on the Co@HCNs cathode surface, which facilitates the reversible decomposition upon charging. The mesoporous hollow nanospindles can provide abundant electron/ions transport channels to synergistically accelerate the formation and decomposition of discharge products. The Li-O2 battery based on Co@HCNs displays remarkably reduced discharge/charge polarization of 0.92 V, impressive rate performance, and stable operation for 250 cycles. This work will provide a new avenue to design advanced oxygen electrocatalysts for high-performance Li-O2 battery.

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来源期刊
CiteScore
16.10
自引率
7.10%
发文量
2568
审稿时长
2 months
期刊介绍: The Journal of Colloid and Interface Science publishes original research findings on the fundamental principles of colloid and interface science, as well as innovative applications in various fields. The criteria for publication include impact, quality, novelty, and originality. Emphasis: The journal emphasizes fundamental scientific innovation within the following categories: A.Colloidal Materials and Nanomaterials B.Soft Colloidal and Self-Assembly Systems C.Adsorption, Catalysis, and Electrochemistry D.Interfacial Processes, Capillarity, and Wetting E.Biomaterials and Nanomedicine F.Energy Conversion and Storage, and Environmental Technologies
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