组件选择型共价有机框架的异质性-细分电荷诱导-合催化 面向稳定金属阳极的接口
Zikang Chen1, Jiajie Pan1, Wenzhi Huang1
1Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China.
ACS nano
|March 25, 2025
概括
基于氨酸的工程共价有机框架通过创建统一的固体电解质间相来稳定金属阳极,提高电池性能和循环寿命.
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:
- 金属阳极对于高能量密度电池至关重要,但由于不规则的固体电解质介相 (SEI) 形成,因此遭受了状物生长.
- 本地SEI层表现出不良的+离子传输和不均的沉积,限制了电池周期寿命和安全性.
研究的目的:
- 为金属阳极开发新型接口,使用基于氨酸的共价有机框架 (COF).
- 设计SEI的组成和结构,以改善Li+离子管理和树抑制.
主要方法:
- 制造COF-366和COF-367作为金属阳极接口.
- 在电解质分解产品 (TFSI-, DME, DOL) 的成分选择性催化中利用COF中的异质细分.
- 构建的Li2O/LiF丰富的SEI层的表征和Li+离子迁移的分析.
主要成果:
- 设计的COF接口促进了快速和均的Li+离子迁移,抑制了树的生长.
- COF-366@Li阳极表现出显著的容量稳定性 (在5C下400个循环后保持70.99%).
- 一个COF-366@Li धूप धूपLFP袋式电池在43个循环后保持了92.42%的容量,证明了卓越的实际性能.
结论:
- 定制的COF可以有效地诱导组件选择性催化,以操纵SEI无机组件.
- 这一策略成功地稳定了金属阳极,为下一代高能量密度电池铺平了道路.
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