Evidence of Quasi-Na Metallic Clusters in Sodium Ion Batteries through In Situ X-Ray Diffraction.

IF 27.4 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Advanced Materials Pub Date : 2024-11-06 DOI:10.1002/adma.202410673

Xi Liu, Minglu Zhang, Xinying Wang, Yi Peng, Yang Liu, Shafi Ullah, Zhihua Duan, Wanjie Gao, Bingyan Song, Mingxuan Wei, Jiarui He, Zhenghui Li, Yuping Wu

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Abstract

Carbonaceous materials have been considered the most promising anode in sodium-ion batteries (SIBs) due to their low cost, good electrical conductivity, and structural stability. The main challenge of carbonaceous anodes prior to their commercialization is low initial coulomb efficiencies, derived from a lack of an efficient technique to reveal a fundamental comprehension of sodium storage mechanisms. Here, the direct observation of quasi-Na metallic clusters in carbonaceous anodes during cycling through in situ XRD is reported. By means of such a technique, a strong self-adsorption behavior forming quasi-Na metallic clusters is detected within a rationally designed highly defective ultrathin carbon nanosheets (HDCS) anode. Such a self-adsorption and crystalline system transformation mechanism in HDCS brings capacity retention about 100% after 1000 cycles at 1 A g^-1. This work provides a new principle for designing high-performance carbon anodes for SIBs.

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通过原位 X 射线衍射证明钠离子电池中存在准纳金属簇。

碳质材料因其低成本、良好的导电性和结构稳定性，一直被认为是钠离子电池（SIB）中最有前途的阳极。在商业化之前，碳质阳极面临的主要挑战是初始库仑效率较低，这是由于缺乏有效的技术来从根本上理解钠的储存机制。本文报告了在循环过程中通过原位 XRD 直接观察碳质阳极中准钠金属簇的情况。通过这种技术，在合理设计的高缺陷超薄碳纳米片（HDCS）阳极中检测到了形成准钠金属团簇的强烈自吸附行为。HDCS 中的这种自吸附和晶系转化机制使其在 1 A g-1 的条件下循环 1000 次后仍能保持约 100% 的容量。这项工作为设计用于 SIB 的高性能碳阳极提供了新的原理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advanced Materials 工程技术-材料科学：综合

CiteScore

43.00

自引率

4.10%

发文量

2182

审稿时长

2 months

期刊介绍： Advanced Materials, one of the world's most prestigious journals and the foundation of the Advanced portfolio, is the home of choice for best-in-class materials science for more than 30 years. Following this fast-growing and interdisciplinary field, we are considering and publishing the most important discoveries on any and all materials from materials scientists, chemists, physicists, engineers as well as health and life scientists and bringing you the latest results and trends in modern materials-related research every week.