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灵活和可扩展的补充在NCM阴极中,由移动Mg2+启用,富含MgVO4启用

Qiaoling Qiu¹, Jiafeng Ruan¹, Wei Zhou¹

¹Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|April 28, 2025

概括

一种新的Mg2+释放膜通过提供现场结构增强来增强富含的层状氧化物阴极. 这种MgV₂O₄膜显著改善了离子电池的周期寿命和容量保留.

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:

富含的分层氧化物阴极对于高能离子电池至关重要.
传统的Mg2+用于阴极稳定的兴奋剂是复杂的,需要广泛的优化.
表面保护和结构完整性是阴极寿命的关键挑战.

研究的目的:

开发一种新的Mg²⁺释放膜,用于现场正极保护和稳定.
为了研究自支MgV₂O₄膜作为阴极间层的有效性.
为了提高富含的分层氧化物阴极的电化学性能和循环寿命.

主要方法:

合成MgV₂O₄与移动的Mg²⁺离子.
制造一个自支的MgV₂O₄膜.
集成MgV₂O₄膜作为一个中间层与LiNi_0.8Co_0.1Mn_0.1O₂ (NCM811) 和其他基于的阴极.
电化学测试,包括循环性能和容量保留测量.

主要成果:

MgV₂O₄膜成功地在现场释放了Mg²⁺,作为结构增强.
采用MgV₂O₄介层的NCM811阴极的循环寿命在1.0°C时增加了1.9倍.
证明了出色的多功能性,其他基于的层状氧化物在1.0°C的800个循环后实现了86.4%的容量保留.

结论:

Mg2+释放膜概念为可扩展的阴极保护和维修提供了一个有效的策略.
这种方法显著提高了富含的分层氧化物阴极的结构稳定性和电化学性能.
MgV₂O₄膜为开发商业上可行的,持久的离子电池提供了一个有希望的解决方案.

关键词:

2+释放片可以释放片.在 MgV2O4 中,MgV2O4 是在NCM阴极中,接口保护接口保护结构稳定性结构稳定性

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