Review of MOF-guided ion transport for lithium metal battery electrolytes

• Published in: Nano energy 2024-06, Vol.125, p.109571, Article 109571
• Main Authors: Zhu, Haolin, Li, Siwu, Peng, Linfeng, Zhong, Wei, Wu, Qiang, Cheng, Shijie, Xie, Jia
• Format: Article
• Language: English
• Subjects: Electrolyte; Ion transport; Lithium metal battery; Metal-organic framework; Solvation structure
• ISSN: 2211-2855
• DOI: 10.1016/j.nanoen.2024.109571

Achieving rechargeable lithium metal batteries (LMBs) is crucial for augmenting the energy density of lithium-based secondary batteries. However, severe electrolyte-interface reactions and the formation of lithium dendrites hinder the practical application of LMBs. Metal-organic frameworks (MOFs) exhibit significant potential in facilitating uniform lithium deposition and suppressing interface side reactions owing to their ordered and adjustable pore structures. Consequently, the application of MOFs in lithium metal battery electrolytes gains considerable attention. This review focuses on two types of MOF-guided ion transport in LMBs: 1) MOFs serve as channels for ion transport in solid-state or pseudo-solid-state electrolytes; 2) MOFs act as sub-nano molecular sieves for regulating solvation structures of lithium ions at interfaces. First, the structural characteristics of MOFs and their advantages in LMB electrolytes are comprehensively elucidated. Then, the advances and challenges pertaining to MOF-guided ion transport in LMB electrolytes are discussed in detail. Finally, future research directions and design principles for LMB electrolytes based on MOFs are proposed. [Display omitted] •MOFs serve as channels for ion transport in solid-state or pseudo-solid-state electrolytes are systemically reviewed.•MOFs act as sub-nano molecular sieves for regulating solvation structures of lithium ions at interfaces are summarized.•The effectiveness of MOF-guided ion transport systems in high-voltage lithium metal battery electrolytes are evaluated.•The key barriers and the feasibilities of these MOF-guided ion transport systems are summarized in detail.•Future research directions and design principles for high-voltage LMBs based on MOF-guided ion transport are proposed.