Boosting Li+ Diffusion in Lithium-Rich Oxides through Intrinsic Structural Design: Insights and Design Principles

IF 36.3 1区材料科学 Q1 Engineering

Nano-Micro Letters Pub Date : 2026-03-05 DOI:10.1007/s40820-026-02099-7

Lifeng Xu, Min Hong, Jingjing Guo, Fangming Shen, Da Xu, Jinjian Zhang, Ying Zhang, Jianhui Zheng, Jun Lu

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引用次数: 0

Abstract

Highlights

Sluggish Li⁺ transport limits high-power output and fast charging in lithium-rich oxides, governed by intrinsic factors (crystal structure, distortion, and reaction kinetics) and external factors (cathode/electrolyte interface behavior, volumetric strain, and particle size distribution).
Rate performance can be improved through interface engineering, targeted doping, particle morphology control, bulk structural optimization, and manipulation of redox chemistry to accelerate Li⁺ transport and stabilize electrochemical reactions.
Understanding dynamic Li⁺ transport requires advanced operando characterization and multiscale computational modeling. Overcoming the capacity-kinetics paradox requires a mechanism-driven approach aimed at lowering the energy barriers for Li⁺ migration.

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通过内在结构设计促进Li+在富锂氧化物中的扩散：见解和设计原则。

富锂氧化物阴极具有高比容量（> 250 mAh g-1）和宽工作电压窗（2.0-4.8 V），使其成为下一代高能电池的有希望的候选者。然而，它们的实际部署受到固有结构约束（包括受限的二维扩散通道、过渡金属迁移和局部晶格扭曲）引起的缓慢离子传输动力学的限制。这些结构扰动使Li+通路变窄，强化阳离子混合，产生局域应变场，共同增加Li+迁移能垒。为了通过内在结构优化来合理设计快速动力学富锂氧化物，本文对结构-扩散相互作用进行了全面阐述，重点介绍了晶格畸变和氧氧化还原化学在调节Li+途径和相关能垒中的作用。系统地评估了旨在提高离子扩散率的结构设计策略，包括界面工程、形态导向设计和氧化还原化学的调节。先进的operando表征技术捕获动态结构和化学演变也被描述为指导精确结构性能分析的基本工具。本文总结的机制见解和综合分析方法为具有增强离子传输动力学的工程富锂氧化物建立了坚实的概念基础，从而支持下一代高功率电池技术的进步。

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

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.