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蒸汽相化调节阳极材料的氧含量

Zhuang Ma¹, Qi Zhang¹, Yin Yang¹

¹State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China.

Journal of colloid and interface science

|July 31, 2025

概括

这项研究开发了一种添加的/碳复合材料 (Si@FC) 阳极,以提高氧化 (SiO_x) 电池的初始库伦比克效率 (ICE). 优化的Si@FC@G材料实现了高容量保留和稳定性,解决了先进阳极的关键限制.

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
纳米技术纳米技术

背景情况:

氧化 (SiO_x) 是一个有前途的阳极材料,用于高容量电池.
由于不可逆转的相位形成,低初始库伦比效率 (ICE) 阻碍了SiO_x的实际应用.
开发提高ICE和自行车稳定的策略对于基于Si的阳极至关重要.

研究的目的:

合成具有双层结构的 (F) 合的Si/C复合物 (Si@FC).
为了优化氧化中的氧含量,以改善ICE.
为离子电池开发一种高性能Si@FC@G阳极材料.

主要方法:

蒸汽相化使用聚四乙烯 (PTFE) 制造Si@FC.
高温热解PTFE产生HF用于蚀刻氧气涂层.
球磨加工以准备Si@FC@G复合物与石墨矩阵.

主要成果:

Si@FC的ICE达到46.70%,比原始Si.提高了20%,比原始Si.
在200个循环 (91.32%的保留) 后,Si@FC@G在0.2 A g-1下保持了409 mAh g-1.
兴奋剂和优化氧含量导致稳定的固体电解质介相 (SEI),富含LiF.

结论:

这种用添加的双层结构有效地解决了SiO_x阳极中低ICE的问题.
Si@FC@G复合材料表现出良好的容量保留和稳定性.
这种方法为大规模开发高稳定性Si基阳极提供了可行的策略.

关键词:

用添加的被使用了.离子电池是一种离子电池.调节氧含量调节氧含量基于Si的阳极是一种基阳极.蒸汽相化法蒸汽相化法

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