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原子层氟化对LiNiMnO高压电极的结构和电化学性能的影响

Effect of Atomic Layer Fluorination on the Structural and Electrochemical Properties of LiNiMnO High Voltage Electrodes.

作者信息

Hatim Oumaima, Farhat Hani, Foix Dominique, Flahaut Delphine, Ledeuil Jean-Bernard, Gal Lucille, Mortemard de Boisse Benoît, Dubois Marc, Guérin Katia, Fraisse Bernard, Louvain Nicolas

机构信息

ICGM, Univ Montpellier, CNRS, ENSCM, 34000 Montpellier, France.

Réseau sur le Stockage Electrochimique de l'Energie (RS2E), FR CNRS 3459, Hub de l'Energie, 63000 Amiens, France.

出版信息

ACS Omega. 2025 Jun 13;10(24):25720-25732. doi: 10.1021/acsomega.5c01717. eCollection 2025 Jun 24.

DOI:10.1021/acsomega.5c01717
PMID:40584366
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12199049/
Abstract

A surge in the need for energy storage with high energy density is evident, especially given the rise of electric vehicles and hand-held electronic devices. This growing demand underscores the importance of innovating in battery technology. In this realm, lithium-ion batteries (LIBs) stand out for their impressive energy density. Notably, the spinel LiNiMnO (LNMO) material has caught the attention of LIBs due to its commendable electrochemical characteristics. This study focuses on the surface modification of disordered LNMO using the Atomic Layer Fluorination (ALF) method and investigates the influence of atomic fluorine on the interface between the LNMO and the electrolyte. Various characterization techniques, including X-ray Photoelectron Spectroscopy (XPS), Auger Electron Spectroscopy-Scanning Auger Microscopy (AES-SAM), Scanning Electron Microscopy (SEM), Nuclear Magnetic Resonance (NMR), and Electron Paramagnetic Resonance (EPR), are used to analyze the modified LNMO samples and understand the surface mechanism. Electrochemical tests reveal significant improvements in the cycling stability of fluorinated LNMO, while the rate capacity remains comparable to that of the pristine LNMO.

摘要

随着电动汽车和手持电子设备的兴起，对高能量密度储能的需求激增。这种不断增长的需求凸显了电池技术创新的重要性。在这一领域，锂离子电池（LIBs）因其令人印象深刻的能量密度而脱颖而出。值得注意的是，尖晶石LiNiMnO（LNMO）材料因其值得称赞的电化学特性而引起了LIBs的关注。本研究重点采用原子层氟化（ALF）方法对无序LNMO进行表面改性，并研究原子氟对LNMO与电解质界面的影响。使用各种表征技术，包括X射线光电子能谱（XPS）、俄歇电子能谱-扫描俄歇显微镜（AES-SAM）、扫描电子显微镜（SEM）、核磁共振（NMR）和电子顺磁共振（EPR），来分析改性后的LNMO样品并了解表面机理。电化学测试表明，氟化LNMO的循环稳定性有显著提高，而倍率性能与原始LNMO相当。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bd4d/12199049/ea015e99502f/ao5c01717_0010.jpg
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本文引用的文献

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