纳米Co3O4涂层赋予LiNi0.9Co0.05Mn0.05O2高循环性能和抑制空气灵敏度

IF 3 4区材料科学 Q3 CHEMISTRY, PHYSICAL

Solid State Ionics Pub Date : 2025-05-12 DOI:10.1016/j.ssi.2025.116893

Na Li, Xinze Li, Ling Li, Yanwei Li, Jiefeng Hai, Bin Huang

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引用次数: 0

摘要

在本研究中，通过简单的固态工艺将超高镍LiNi0.9Co0.05Mn0.05O2包裹在Co3O4纳米颗粒上。系统研究了Co3O4涂层对材料的晶体结构、微观结构、循环性能、电化学反应动力学和电化学扩散动力学的影响。x射线衍射和扫描电镜分析表明，Co3O4涂层对LiNi0.9Co0.05Mn0.05O2的晶体和显微组织性能没有明显影响。在室温（25℃）和高温（55℃）条件下，co3o4包覆的LiNi0.9Co0.05Mn0.05O2比纯LiNi0.9Co0.05Mn0.05O2具有更好的循环性能。此外，Co3O4涂层加速了电化学反应动力学。本研究为高性能超高镍层状正极材料的制备提供了新的思路。

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Nano Co3O4 coating endows LiNi0.9Co0.05Mn0.05O2 with high cycling performance and suppressed air sensitivity

In this study, ultra-high nickel LiNi_0.9Co_0.05Mn_0.05O₂ is coated by Co₃O₄ nanoparticles through a facile solid-state process. A systematic investigation is conducted to evaluate the impacts of the Co₃O₄ coating on the crystal structure, microstructure, cycling performance, electrochemical reaction kinetics, and electrochemical diffusion kinetics of the material. X-ray diffraction and scanning electron microscopy analyses reveal that the Co₃O₄ coating has no obvious effect on the crystal and microstructural properties of LiNi_0.9Co_0.05Mn_0.05O₂. Under both room temperature (25 °C) and high temperature (55 °C) conditions, the Co₃O₄-coated LiNi_0.9Co_0.05Mn_0.05O₂ exhibits superior cycling performance compared to the pure LiNi_0.9Co_0.05Mn_0.05O₂. Additionally, the Co₃O₄ coating accelerates the electrochemical reaction kinetics. This research provides insights into the preparation of ultra-high Ni layered cathode materials with high-performance.

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来源期刊

Solid State Ionics 物理-物理：凝聚态物理

CiteScore

6.10

自引率

3.10%

发文量

152

审稿时长

58 days

期刊介绍： This interdisciplinary journal is devoted to the physics, chemistry and materials science of diffusion, mass transport, and reactivity of solids. The major part of each issue is devoted to articles on: (i) physics and chemistry of defects in solids; (ii) reactions in and on solids, e.g. intercalation, corrosion, oxidation, sintering; (iii) ion transport measurements, mechanisms and theory; (iv) solid state electrochemistry; (v) ionically-electronically mixed conducting solids. Related technological applications are also included, provided their characteristics are interpreted in terms of the basic solid state properties. Review papers and relevant symposium proceedings are welcome.