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层层的富阴极材料Na_1.2Ni_0.2Mn_0.6O₂具有高速率和长周期寿命

Zixuan Zeng¹, Qijie Li¹, Nan Sun¹

¹School of Materials and Energy, Southwest University, Chongqing 400715, China.

ACS applied materials & interfaces

|July 11, 2025

概括

一种新的富含的多层材料P2-Na1.2Ni0.2Mn0.6O2 (NNMO) 为离子电池合成. 这种材料具有出色的电化学性能和循环稳定性,使其成为下一代能源存储的有希望的候选者.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
无机化学无机化学

背景情况:

离子电池 (SIB) 是离子电池的有前途的替代品,因为它们含有大量的.
开发高性能阴极材料对于推进SIB技术至关重要.
多层过渡金属氧化物在SIB应用中得到了广泛的研究.

研究的目的:

为SIBs设计和合成一种新的富含的分层材料.
研究合成材料的结构和电化学特性.
评估材料作为高性能SIBs的阴极的潜力.

主要方法:

对于P2-Na1.2Ni0.2Mn0.6O2 (NNMO) 材料的索尔凝合成方法.
用于结构分析的X射线衍射 (XRD).
电化学性能测试,包括循环电压测量和静电循环.

主要成果:

合成的NNMO材料具有P2相层结构,层间间距较大.
的加入有效降低了Mn3+含量,减轻了Jahn-Teller效应并提高了稳定性.
该NNMO电极在0.2°C时显示出127.4mAhg-1的高初始可逆容量,并在100个循环后保持90.2%的容量.
观察到异常的循环稳定性,在1C的500个循环后保持了90.0%的容量.

结论:

该P2-Na1.2Ni0.2Mn0.6O2材料表现出卓越的电化学性能和卓越的循环稳定性.
扩大的层间距离和减少的Jahn-Teller效应有助于其增强的特性.
NNMO是下一代离子电池的非常有前途的阴极材料.

关键词:

富含Na的多层氧化物.阴极材料的材料是正极材料.电化学性能电化学性能电化学性能离子电池离子电池结构稳定性结构稳定性

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