抑制富锂离子层状氧化物阴极的电压衰减:从 O3 型到 O2 型结构设计。

IF 26.6 1区 材料科学 Q1 Engineering Nano-Micro Letters Pub Date : 2024-08-01 DOI:10.1007/s40820-024-01473-7
Guohua Zhang, Xiaohui Wen, Yuheng Gao, Renyuan Zhang, Yunhui Huang
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引用次数: 0

摘要

富锂层状氧化物(LRLO)阴极结合了阳离子和阴离子氧化还原活性,具有极高的能量密度,因此被视为下一代锂离子电池的理想候选材料。然而,循环过程中的持续电压衰减仍然是实际应用的主要障碍,这一问题尚未得到根本解决。人们普遍认为,电压衰减源于过渡金属离子的不可逆迁移,这通常会进一步加剧结构演变,并加剧不可逆的氧氧化还原反应。最近,构建 O2- 型结构被认为是抑制电压衰减的最有前途的方法之一。本综述系统地阐明了电压衰减与结构演化之间的关系。系统总结了抑制电压衰减的策略。此外,还全面讨论了 O2- 型结构的设计和抑制电压衰减的相应机制。遗憾的是,已报道的 O2- 型 LRLO 阴极在延长周期后仍表现出部分无序结构。本文还探讨了可能导致 O2- 型 LRLO 材料中过渡金属不可逆迁移的因素,并提出了设计无电压衰减的高性能 O2- 型 LRLO 阴极的前景和挑战。
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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Inhibiting Voltage Decay in Li-Rich Layered Oxide Cathode: From O3-Type to O2-Type Structural Design

Li-rich layered oxide (LRLO) cathodes have been regarded as promising candidates for next-generation Li-ion batteries due to their exceptionally high energy density, which combines cationic and anionic redox activities. However, continuous voltage decay during cycling remains the primary obstacle for practical applications, which has yet to be fundamentally addressed. It is widely acknowledged that voltage decay originates from the irreversible migration of transition metal ions, which usually further exacerbates structural evolution and aggravates the irreversible oxygen redox reactions. Recently, constructing O2-type structure has been considered one of the most promising approaches for inhibiting voltage decay. In this review, the relationship between voltage decay and structural evolution is systematically elucidated. Strategies to suppress voltage decay are systematically summarized. Additionally, the design of O2-type structure and the corresponding mechanism of suppressing voltage decay are comprehensively discussed. Unfortunately, the reported O2-type LRLO cathodes still exhibit partially disordered structure with extended cycles. Herein, the factors that may cause the irreversible transition metal migrations in O2-type LRLO materials are also explored, while the perspectives and challenges for designing high-performance O2-type LRLO cathodes without voltage decay are proposed.

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来源期刊
Nano-Micro Letters
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.
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