A LiF-Pie-Structured Interphase for Silicon Anodes.

IF 26.6 1区材料科学 Q1 Engineering

Nano-Micro Letters Pub Date : 2025-07-07 DOI:10.1007/s40820-025-01832-y

Weiping Li,Shiwei Xu,Cong Zhong,Qiu Fang,Suting Weng,Yinzi Ma,Bo Wang,Yejing Li,Zhaoxiang Wang,Xuefeng Wang

{"title":"A LiF-Pie-Structured Interphase for Silicon Anodes.","authors":"Weiping Li,Shiwei Xu,Cong Zhong,Qiu Fang,Suting Weng,Yinzi Ma,Bo Wang,Yejing Li,Zhaoxiang Wang,Xuefeng Wang","doi":"10.1007/s40820-025-01832-y","DOIUrl":null,"url":null,"abstract":"Silicon (Si) is a promising anode material for rechargeable batteries due to its high theoretical capacity and abundance, but its practical application is hindered by the continuous growth of porous solid-electrolyte interphase (SEI), leading to capacity fade. Herein, a LiF-Pie structured SEI is proposed, with LiF nanodomains encapsulated in the inner layer of the organic cross-linking silane matrix. A series of advanced techniques such as cryogenic electron microscopy, time-of-flight secondary ion mass spectrometry, and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry have provided detailed insights into the formation mechanism, nanostructure, and chemical composition of the interface. With such SEI, the capacity retention of LiCoO2||Si is significantly improved from 49.6% to 88.9% after 300 cycles at 100 mA g-1. These findings provide a desirable interfacial design principle with enhanced (electro) chemical and mechanical stability, which are crucial for sustaining Si anode functionality, thereby significantly advancing the reliability and practical application of Si-based anodes.","PeriodicalId":714,"journal":{"name":"Nano-Micro Letters","volume":"42 1","pages":"322"},"PeriodicalIF":26.6000,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nano-Micro Letters","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s40820-025-01832-y","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Engineering","Score":null,"Total":0}

引用次数: 0

Abstract

Silicon (Si) is a promising anode material for rechargeable batteries due to its high theoretical capacity and abundance, but its practical application is hindered by the continuous growth of porous solid-electrolyte interphase (SEI), leading to capacity fade. Herein, a LiF-Pie structured SEI is proposed, with LiF nanodomains encapsulated in the inner layer of the organic cross-linking silane matrix. A series of advanced techniques such as cryogenic electron microscopy, time-of-flight secondary ion mass spectrometry, and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry have provided detailed insights into the formation mechanism, nanostructure, and chemical composition of the interface. With such SEI, the capacity retention of LiCoO2||Si is significantly improved from 49.6% to 88.9% after 300 cycles at 100 mA g-1. These findings provide a desirable interfacial design principle with enhanced (electro) chemical and mechanical stability, which are crucial for sustaining Si anode functionality, thereby significantly advancing the reliability and practical application of Si-based anodes.

查看原文本刊更多论文

一种用于硅阳极的liff饼结构界面相。

硅（Si）具有较高的理论容量和丰度，是一种很有前途的可充电电池负极材料，但由于多孔固体-电解质界面（SEI）的不断增长，导致容量衰减，阻碍了其实际应用。本文提出了一种LiF- pie结构的SEI，将LiF纳米结构域封装在有机交联硅烷基体的内层中。低温电子显微镜、飞行时间二次离子质谱、基质辅助激光解吸/电离飞行时间质谱等一系列先进技术为界面的形成机制、纳米结构和化学组成提供了详细的见解。使用这种SEI，在100 mA g-1下循环300次后，LiCoO2||Si的容量保持率从49.6%显著提高到88.9%。这些发现提供了一种理想的界面设计原则，具有增强的（电）化学和机械稳定性，这对于维持Si阳极的功能至关重要，从而显著提高了Si基阳极的可靠性和实际应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

32.60

自引率

4.90%

发文量

981

审稿时长

1.1 months

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary, and open-access journal published under the SpringerOpen brand. Nano-Micro Letters focuses on the science, experiments, engineering, technologies, and applications of nano- or microscale structures and systems in various fields such as physics, chemistry, biology, material science, and pharmacy.It also explores the expanding interfaces between these fields. Nano-Micro Letters particularly emphasizes the bottom-up approach in the length scale from nano to micro. This approach is crucial for achieving industrial applications in nanotechnology, as it involves the assembly, modification, and control of nanostructures on a microscale.