Kim Yoonseob, Li Chen, Huang Jun, Yuan Yufei, Tian Ye, Zhang Wei
Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China.
Energy Institute, The Hong Kong University of Science and Technology, Hong Kong SAR, China.
Adv Mater. 2024 Oct;36(40):e2407761. doi: 10.1002/adma.202407761. Epub 2024 Aug 19.
Rechargeable secondary batteries, widely used in modern technology, are essential for mobile and consumer electronic devices and energy storage applications. Lithium (Li)-ion batteries are currently the most popular choice due to their decent energy density. However, the increasing demand for higher energy density has led to the development of Li metal batteries (LMBs). Despite their potential, the commonly used liquid electrolyte-based LMBs present serious safety concerns, such as dendrite growth and the risk of fire and explosion. To address these issues, using solid-state electrolytes in batteries has emerged as a promising solution. In this Perspective, recent advancements are discussed in ionic covalent organic framework (ICOFs)-based solid-state electrolytes, identify current challenges in the field, and propose future research directions. Highly crystalline ion conductors with polymeric versatility show promise as the next-generation solid-state electrolytes. Specifically, the use of anionic or cationic COFs is examined for Li-based batteries, highlight the high interfacial resistance caused by the intrinsic brittleness of crystalline ICOFs as the main limitation, and presents innovative ideas for developing all- and quasi-solid-state batteries using ICOF-based solid-state electrolytes. With these considerations and further developments, the potential for ICOFs is optimistic about enabling the realization of high-energy-density all-solid-state LMBs.
可充电二次电池在现代技术中广泛应用，对移动和消费电子设备以及储能应用至关重要。锂离子电池因其良好的能量密度，目前是最受欢迎的选择。然而，对更高能量密度的需求不断增加，促使锂金属电池（LMBs）得到发展。尽管具有潜力，但常用的基于液体电解质的LMBs存在严重的安全问题，如枝晶生长以及火灾和爆炸风险。为解决这些问题，在电池中使用固态电解质已成为一种有前景的解决方案。在这篇综述中，讨论了基于离子共价有机框架（ICOFs）的固态电解质的最新进展，识别该领域当前的挑战，并提出未来的研究方向。具有聚合物多功能性的高度结晶离子导体有望成为下一代固态电解质。具体而言，研究了阴离子或阳离子COF在锂基电池中的应用，强调了结晶ICOFs固有的脆性导致的高界面电阻是主要限制因素，并提出了使用基于ICOF的固态电解质开发全固态和准固态电池的创新思路。考虑到这些因素并进一步发展，ICOFs在实现高能量密度全固态LMBs方面的潜力令人乐观。
