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SiO_x - 基于高Si含量的阳极材料,通过离子电池的均纳米Si分散实现

Seunghyeok Jang¹, Jae-Hun Kim¹

¹School of Materials Science and Engineering, Kookmin University, Seoul 02707, Republic of Korea.

Materials (Basel, Switzerland)

|July 30, 2025

概括

这项研究改进了离子电池的子氧化 (SiO_x) 阳极,达到89%的初始库伦比效率和高可逆容量. 碳合并进一步提高了商业可行性的稳定性.

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:

基于合金的材料是离子电池 (LIB) 的高容量阳极,旨在取代石墨.
子氧化物 (SiO_x) 显示出比纯更好的循环稳定性,但实现高初始库伦比效率 (ICE) 是具有挑战性的.
以前的Si_xO复合材料改善了ICE和容量,但没有达到纯水平.

研究的目的:

提高离子电池的可逆容量和初始库伦比克效率 (ICE) 的亚氧化 (SiO_x) 阳极材料.
为了研究含量增加的影响,并在SiO_x矩阵中追踪氧气分布.
评估碳合并对开发的阳极材料循环稳定性的影响.

主要方法:

使用了含量增加的高能机械削.
使用X射线衍射,拉曼光谱和电子显微镜进行结构性表征.
电化学分析以确定初始库伦比克效率 (ICE) 和可逆容量.

主要成果:

在SiO_x矩阵内证实了纳米大小的晶体 (<10nm) 的均分散,导致晶体大小减少和部分无形化.
获得了89%的初始库伦比克效率 (ICE) 和2558mAhg-1的可逆容量.
发现碳的结合提高了材料的循环稳定性.

结论:

开发的具有增强含量和受控氧气分布的子氧化物材料在ICE和可逆容量方面取得了显著的改进.
由于其性能和增强的循环稳定性,该材料在离子电池中的商业应用具有相当大的潜力.
这种方法为推进超越当前限制的基于的阳极提供了可行的策略.

关键词:

离子电池是一种离子电池.基材料是一种基于的材料.亚氧化物复合物亚氧化物复合物阳极材料是一种阳极材料.高容量的高容量.

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