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通过现场电化学化为稳定的金属电池实现的人工LiF丰富接口

Xun Jian Hu¹, Yi Ping Zheng¹, Zhi Wei Li¹

¹Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology (JXUST), 86 Hongqi Road, Ganzhou, 341000, China.

Angewandte Chemie (International ed. in English)

|January 29, 2024

概括

研究人员开发了一种用于金属电池的化碳纳米管宏膜混合阳极. 这一创新创造了一个稳定的,富含LiF的固体电解质接口,提高了电池的循环利用性和性能,同时抑制了树突的生长.

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:

金属电池具有很高的能量密度,但由于电解质降解,它们存在不稳定的固体电解质接口 (SEI).
脆弱和不均的SEI层导致树的生长和电池循环能力差.

研究的目的:

为金属电池开发使用化碳纳米管宏膜 (CMF) 的混合阳极.
研究化CNT-CMF调节阳极/电解质接口并形成稳定的SEI的能力.
为了提高电化学性能和金属电池的长期稳定性.

主要方法:

化碳纳米管宏膜 (CMF) 被用作金属上的混合阳极.
在充电周期期间研究了化过程,以形成富含LiF的SEI.
电化学性能,包括可循环和速率容量,在全细胞中进行了评估.

主要成果:

化CNT-CMF促进了富含LiF的SEI直接形成,具有高的Young模量 (~2.0 GPa) 和快速的离子导电性 (~2.59×10-7 S cm-1).
设计的SEI引导了均涂层/脱落,并有效地抑制了树的生长.
使用混合阳极的全电池表现出显著增强的循环能力,容量保留~99.3%,速度能力显著.

结论:

化CNT-CMF混合阳极有效地稳定了金属电池中的固体电解质接口.
这种化策略为控制人工SEI形成提供了一个平台,提高了电池的稳定性和寿命.
开发的技术有望推进下一代高性能储能系统.

关键词:

碳纳米管是如何使用的化化化化金属电池金属电池富含LiF的富含LiF的植物.固体电解质接口固体电解质接口

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