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Epitaxial Nanostructured α-Quartz Films on Silicon: From the Material to New Devices

Epitaxial Nanostructured α-Quartz Films on Silicon: From the Material to New Devices

Published on: October 6, 2020

在Si基电极上使用原子层沉积导向SEI形成,使用原子层沉积.

Supti Das¹, Anders Brennhagen¹, Carmen Cavallo¹

¹Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, PO Box 1033, Blindern, 0315, Oslo, Norway. alexey.koposov@kjemi.uio.no.

Chemical communications (Cambridge, England)

|November 27, 2024

概括

设计人工固体电解质界面 (SEI) 是离子电池的关键. 通过原子层沉积,用二氧化 (TiO2) 涂覆纳米粒子,使用无FEC电解质显著提高了电池循环稳定性.

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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
电池技术电池技术

背景情况:

离子电池的容量衰减是一个主要的挑战,通常与不稳定的固体电解质介相 (SEI) 形成有关.
纳米粒子是有希望的阳极材料,因为它们的理论容量很高,但它们的循环稳定性很差.
开发人工SEI层对于提高电池性能和寿命至关重要.

研究的目的:

调查二氧化 (TiO2) 作为纳米粒子人工SEI层的有效性.
评估TiO2涂层对离子电池电化学性能和循环稳定性的影响.
为了评估人工SEI在无乙烯碳酸盐 (FEC) 电解质中的性能.

主要方法:

原子层沉积 (ALD) 用于用TiO2.2对纳米粒子进行均涂层.
进行了电化学测试,包括循环性能和容量保留.
在没有FEC的电解质条件下分析了人工SEI的稳定性.

主要成果:

2人工SEI显著抑制了长时间循环期间的容量损失.
与未涂层对应物相比,涂有TiO2的纳米粒子阳极表现出增强的循环稳定性.
人工SEI在实际无FEC电解质配方中表现出有效性.

结论:

原子层沉积TiO2提供了一个有效的策略,在纳米颗粒上创建强大的人工SEI层.
2人工SEI有助于提高循环稳定性和减少离子电池的容量色.
这种方法对开发用于下一代电池的高性能基阳极充满希望,特别是在没有FEC的电解质系统中.