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Updated: Jul 13, 2025

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高压金属电池由乙烯基甘醇 bis (((propionitrile) 以太-LiNO₃协同作用的添加剂启用

Shaopeng Li^1,2, Kangsheng Huang¹, Langyuan Wu¹

¹Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China azhangxg@nuaa.edu.cn.

Chemical science

|October 13, 2023

概括

这项研究引入了一种用于金属电池 (LMB) 的新型电解质添加剂. 新的添加剂增强了阳极和阴极的稳定性,提高了电池的性能和寿命.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
储能储能储能储能储能储能

背景情况:

金属阳极对于超高能电池至关重要,但由于电解质不稳定性而面临挑战.
金属电池 (LMB) 的商业化受到热力学不稳定性和在接口上的溶剂分解的阻碍.

研究的目的:

为稳定Li金属阳极和LiCoO2 (LCO) 阴极接口设计一种双功能电解质添加剂.
提高高压LMB的性能和周期寿命.

主要方法:

引入酸 (LiNO3) 通过乙烯基醇 bis ((Propionitrile) 以太 (DENE) 作为双功能电解质.
使用协调-溶解理论分析固体电解质间相 (SEI) 形成.
在现场电化学扩张测量以研究沉积行为.

主要成果:

在金属阳极上形成了一个稳定的Li3N增强的SEI,使得库伦比效率 (CE) 提高到98.5%.
电解质证明了高度可逆的沉积与低体积膨胀.
在100个循环后,Li‖LCO电池在4.6V时实现了99.2%的平均CE和88.2%的容量保留.

结论:

开发的电解质添加剂有效地稳定了高压LMB中的接口.
该战略为使用双电解质添加剂创建先进的LMB提供了指导.
用Li3N增强的SEI是实现LMB高性能和稳定的关键.

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