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在离子电池的牺牲性阴极添加剂中,通过有利的表面重建来进行无害的预化

Yulun Wu¹, Juanlang Guo¹, Furong Qin¹

¹School of Metallurgy and Environment, Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Hunan Provincial Key Laboratory of Nonferrous Value-Added Metallurgy, Central South University, Changsha 410083, PR China.

Journal of colloid and interface science

|December 29, 2023

概括

可以改进离子电池的牺牲性阴极添加剂. 用Li5AlO4 (LAO) 重建Li2Cu0.1Ni0.9O2 (LCNO) 的表面,可以最大限度地减少负面影响并提高性能.

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
电池技术电池技术

背景情况:

牺牲性阴极添加剂用于减轻离子电池 (LIB) 的初始容量损失.
然而,这些添加剂可能会导致残留物,副作用和性能降低,对溶液的研究有限.
基于的添加剂,如Li2Cu0.1Ni0.9O2 (LCNO) 是有希望的,但需要优化.

研究的目的:

为了研究基于的牺牲添加剂 (LCNO) 对LIB性能的影响.
制定LCNO的表面重建战略,以减轻其负面影响.
为了评估表面重建LCNO (SR-LCNO) 在完整细胞中的性能.

主要方法:

合成的Li2Cu0.1Ni0.9O2 (LCNO) 作为牺牲性阴极添加剂.
通过干式球磨和回火将Li5AlO4 (LAO) 涂层涂在LCNO上.
在使用商用阴极材料的全电池中测试了SR-LCNO的电化学性能.

主要成果:

Li5AlO4涂层有效地消耗了LCNO上的剩余化合物.
表面重建的LCNO (SR-LCNO) 在高电压 (>4.1V) 下表现出减少的气体产生和抑制的结构降解.
用SR-LCNO的全细胞显示电化学特性得到改善,没有恶化的副作用.

结论:

表面重建是一个可行的策略,以减轻牺牲阴极添加剂的负面影响.
开发的SR-LCNO为LIBs提供了一种无害的预化方法.
这种方法使得牺牲添加剂的有益使用,同时保持电池性能和安全.

关键词:

涂层涂层是一种涂层.() 5 () 4 () 4 () 5 () 4 () 5 () 5 () 4 () 5 () 5 () 5 () 4 () 5 () 5 () 5 () 5 () 5 () 6 () 6 () 7 () 7 () 7 () 7 () 7 () 8 () 7 () 7 () 8 () 8 () 8 () 7 () 8 () 8 () 9 () 7 () 8 () 8 () 9 () 9 () 9 () 9 () 9 () 9 () 9 () 9 () 9 () () () ()离子电池是一种离子电池.在化前进行化.副作用的反应副作用的反应表面重建的重建.

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