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从表面到散装的多层工程使高稳定性丰富的O3类型阴极向耐温度的近固态纳离子电池实现

Leilei Wang¹, Jiwei Hao¹, Guoshuai Su¹

¹School of Material Science & Engineering, University of Jinan, Jinan, 250022, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|February 25, 2025

概括

这项研究使用表面到散装修改策略设计了先进的离子电池阴极. 新的TF-NCM@NTP阴极在广泛的温度应用中表现出色的性能和稳定性.

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
储能储能储能储能储能储能

背景情况:

高容量离子电池 (NIB) 对于储能至关重要.
富含O3型Ni的NCM阴极因化学机械不稳定性和相位过渡而面临挑战.
这些不稳定性限制了NCM阴极在NIB中的广泛应用.

研究的目的:

为NIBs设计一个先进的NCM阴极,以提高稳定性和性能.
为了解决丰富的NCM阴极中的化学机械不稳定性.
为NIB阴极材料制定一个多层次的工程战略.

主要方法:

采用了一个合作的表面到散装修改策略.
在现场用NaTi2(PO4) 3 (NTP) 进行表面涂层.
大量Ti/F联合兴奋剂被引入,以创建TF-NCM@NTP阴极.

主要成果:

该NTP涂层提供了稳定的接口,并改善了脱/脱动力学.
Ti/F 联合兴奋剂加强了格子,减轻了内部应变.
TF-NCM@NTP阴极在半电池和全电池中表现出高容量和长周期寿命.
基于TF-NCM@NTP的准固态NIB实现了285Wh kg-1的能量密度和广泛的温度耐受性 (-20至50°C).

结论:

开发的TF-NCM@NTP阴极表现出卓越的储存性能.
表面到散装修改策略对于设计先进的NIB阴极材料是有效的.
这种方法显著推动了多场景适用的NIBs的发展.

关键词:

NaNi0.5Co0.2Mn0.3O2 的2O2 的2O2 的2O2 的2O2 的2O2 的2O2 的采用O3类型的阴极.多层次的工程工程.准固态离子电池准固态离子电池具有广泛的温度耐受性.

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