Rationally constructing metallic Sn-ZnO heterostructure via in-situ Mn doping for high-rate Na-ion batteries

IF 9.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Chinese Chemical Letters Pub Date : 2024-07-25 DOI:10.1016/j.cclet.2024.110273

Bin Feng , Tao Long , Ruotong Li , Yuan-Li Ding

引用次数: 0

Abstract

Developing a heterostructure for alloying-based anode for sodium-ion batteries (SIBs) is an efficient solution to accommodate volume change upon sodiation/desodiation and boost sodium storage since it combines the merits of each component. Herein, we report a metallic and microphone-like Sn-Zn_0.9Mn_0.1O heterostructure via an in-situ Mn doping strategy. Based on theoretical calculations and experimental results, the introduction of Mn into ZnO (a small amount of Mn also diffuses into the Sn lattice) can not only enhance intrinsic electronic conductivity but also reduce the Na⁺ diffusion barrier inside the Sn phase. When evaluated as anode for SIBs, the obtained heterostructures show a high reversible capacity of 395.1 mAh/g at 0.1 A/g, rate capability of 332 mAh/g at 5 A/g, and capacity retention of almost 100 % after 850 cycles at 5 A/g, indicating its great potential for high-power application of SIBs.

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通过原位掺杂锰合理构建用于高倍率钠离子电池的金属锡锌氧化物异质结构

为钠离子电池（SIB）的合金基阳极开发一种异质结构是适应钠化/解钠时的体积变化并提高钠存储量的有效解决方案，因为它结合了每种成分的优点。在此，我们通过原位掺杂锰的策略，报告了一种金属和麦克风状的 Sn-Zn0.9Mn0.1O 异质结构。根据理论计算和实验结果，在 ZnO 中引入 Mn（少量 Mn 也扩散到锡晶格中）不仅能提高本征电子电导率，还能降低锡相内部的 Na+ 扩散阻抗。在作为 SIB 的阳极进行评估时，所获得的异质结构在 0.1 A/g 条件下显示出 395.1 mAh/g 的高可逆容量，在 5 A/g 条件下显示出 332 mAh/g 的速率能力，在 5 A/g 条件下循环 850 次后容量保持率几乎达到 100%，这表明它在 SIB 的大功率应用方面具有巨大潜力。

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

Chinese Chemical Letters 化学-化学综合

CiteScore

14.10

自引率

15.40%

发文量

8969

审稿时长

1.6 months

期刊介绍： Chinese Chemical Letters (CCL) (ISSN 1001-8417) was founded in July 1990. The journal publishes preliminary accounts in the whole field of chemistry, including inorganic chemistry, organic chemistry, analytical chemistry, physical chemistry, polymer chemistry, applied chemistry, etc.Chinese Chemical Letters does not accept articles previously published or scheduled to be published. To verify originality, your article may be checked by the originality detection service CrossCheck.