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预先构建的机电化学适应性固体电解质间相,以提高化学预化SiO阳极的Li++扩散动力学和接口稳定性

Zhan Wang¹, Shuang Li¹, Yun Zheng²

¹Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipments, School of Materials Science and Physics, China University of Mining and Technology, Xuzhou, 221116, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|October 16, 2025

概括

研究人员为高能离子电池开发了一种新的一氧化阳极策略. 这种方法提高了Coulombic的初始效率和稳定性,为更持久,高性能电池铺平了道路.

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:

一氧化 (SiO) 阳极对于高能离子电池 (LIB) 是至关重要的.
挑战包括初始库伦比克效率 (ICE) 较低和大量量的扩张.
现有的化学预化方法改善了ICE,但恶化了体积膨胀和空气稳定性.

研究的目的:

开发一种新的策略,用于在SiO阳极上预构建稳定和适应性的固体电解质介面 (SEI).
为了克服传统预化方法的局限性,提高电池性能和耐用性.
为了提高SiO阳极的电化学动力学和机械稳定性,用于高能LIBs.

主要方法:

采用化学预化介导的策略,使用六氧化 (Ah) 和预化SiO (Pr-SiO).
这种反应自发地形成了一种具有刚性-柔性特征的机电化学适应性SEI.
该SEI组合包括LiF,Li3N和ZrO2组件.

主要成果:

经过修改的阳极 (Ah-Pr-SiO) 显示出高ICE99.4%和卓越的循环稳定性 (1435.8mAhg-1经过200个循环).
适应性SEI促进了快速的Li+扩散动力学,并提高了机械耐用性.
该Ah-Pr-SiO表现出高的疏水性和空气稳定性,使其具有工业兼容性. 一个袋式电池实现了346.6 Wh kg-1的能量密度.

结论:

拟议的化学预化介导的SEI建设战略有效地解决了SiO阳极的关键挑战.
机电化学适应性SEI为设计基于Si的阳极的先进SEI层提供了一条途径.
这种方法为开发高能量密度,长寿命的离子电池提供了巨大的潜力.

关键词:

这是一个SiO阳极.化学预化化学预化最初的库伦比克效率.离子电池的离子电池固体电解质相间阶段

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