富有缺陷的MOF (MIL-88A) 用于高性能基于PEO的复合固体电解质
Junjie Wang1, Yaqing Wang1, Ying Yu1
1State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China.
ACS applied materials & interfaces
|April 15, 2025
概括
金属有机框架 (MOF) 的缺陷工程增强了基于PEO的固体电解质. 这种方法提高了离子导电性和电池稳定性,用于先进的储能应用.
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:
- 基于聚乙烯氧化物 (PEO) 的复合固体电解质对于更安全的电池至关重要.
- 目前的MOF填充器需要更多的活性位点来提高离子导电性.
- 开发高效的MOF是下一代固态电池的关键.
研究的目的:
- 为基于PEO的固体电解质设计具有增强活性位点的金属有机框架 (MOF).
- 调查缺陷部位对离子导电性和电池性能的影响.
- 展示一个可扩展的MOF修改策略.
主要方法:
- 酸蚀刻用于在MIL-88A MOF中创建缺陷位置,产生EMIL-88A.
- 关于孔隙结构和金属协调部位的EMIL-88A的表征.
- 用EMIL-88A.进行基于PEO的复合固体电解质的制造和电化学测试.
主要成果:
- 雕刻的MIL-88A (EMIL-88A) 呈现出多孔性增加,暴露出不和的金属部位.
- 埃米尔-88A促进了盐解离,并将Li+转移数提高到0.63.
- 复合电解质实现了高离子导电性 (4.2 × 10-4 S cm-1在60°C) 和稳定的Li-Li对称电池性能 (>300小时).
- 充满LiFePO4的电池在250个循环后显示了113.2mAhg-1的可逆容量.
结论:
- 在MOF中缺陷工程是一种可行的策略,以增强基于PEO的固体电解质.
- 开发的EMIL-88A显著提高了离子导电性和电池稳定性.
- 这种方法为先进的固态电池开发提供了一个有前途的途径.
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