钠离子电池用多相锰系层状氧化物:结构变化和相变

Zhaomeng Liu, Yingying Song, Shizheng Fu, Pengyan An, Mohan Dong, Shuran Wang, Qingsong Lai, Xuan‐Wen Gao, Wen-Bin Luo
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引用次数: 0

摘要

钠离子电池(SIB)因其环境友好性、天然丰富的钠资源和简单的设计而被公认为能源存储系统的主要选择。负极材料对于确定 SIB 的结构完整性和功能功效至关重要。最近的研究广泛关注以锰(Mn)为基础的层状氧化物,这主要是因为它们具有强大的比容量、成本效益、无毒性和生态兼容性。此外,这些材料还具有电压范围广、构型多样的特点。然而,循环过程中复杂的相变会影响其电化学性能。在此,我们以锰基多相层状氧化物为研究对象,以这些材料的结构与相变之间的关系为切入点,旨在阐明多相层状氧化物的微观结构与相变之间的机理。同时,揭示了锰基层状氧化物结构变化与电化学性能之间的构效关系。总结了锰基多相层状氧化物的各种改性方法。由此,提出了基于这些氧化物生产高性能 SIB 的合理结构设计。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Multiphase manganese-based layered oxide for sodium-ion batteries: structural change and phase transition
Sodium-ion batteries (SIBs) are recognized as a leading option for energy storage systems, attributed to their environmental friendliness, natural abundance of sodium, and uncomplicated design. Cathode materials are crucial in defining the structural integrity and functional efficacy of SIBs. Recent studies have extensively focused on manganese (Mn)-based layered oxides, primarily due to their substantial specific capacity, cost-effectiveness, non-toxic nature, and ecological compatibility. Additionally, these materials offer a versatile voltage range and diverse configurational possibilities. However, the complex phase transition during a circular process affects its electrochemical performance. Herein, we set the multiphase Mn-based layered oxides as the research target and take the relationship between the structure and phase transition of these materials as the starting point, aiming to clarify the mechanism between the microstructure and phase transition of multiphase layered oxides. Meanwhile, the structure-activity relationship between structural changes and electrochemical performance of Mn-based layered oxides is revealed. Various modification methods for multiphase Mn-based layered oxides are summarized. As a result, a reasonable structural design is proposed for producing high-performance SIBs based on these oxides.
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