膜科学与技术

磺酸功能性COFs材料的制备及其性能研究

作者：王英姑¹，李梅筠¹，周航宇²， ³，李震⁴

单位： 1. 南昌理工学院智能建筑工程学院，南昌 330044； 2. 中国安全生产科学研究院，北京100012； 3. 电化学能源消防安全联合创新应急管理部重点实验室，北京 100012； 4. 华东交通大学材料科学与工程学院，南昌 330013

关键词：共价有机框架；后修饰策略；磺酸基团；复合电解质薄膜

DOI号： 10.16159/j.cnki.issn1007-8924.2026.02.015

分类号： TB34

出版年,卷(期):页码： 2026,46(2):143-152

摘要：

共价有机框架（COFs）材料具有无机材料的有序性和聚合物的灵活结构可设计性，同时兼有良好的热稳定性和有序孔道结构，在固态电解质材料领域展现出极大的应用潜力。已报道的磺酸功能性COFs材料具有强电负性、高电荷离域程度和优异的离子解离能力，使得该类COFs材料备受关注。然而，现有的磺酸功能性COFs材料结构单一，在提升电解质性能方面极其受限，阻碍了其在该领域的进一步发展。本研究首先制备含活性醛基锚定点的母体材料TDCOF60CHO，随后利用后修饰策略，在COFs孔壁上引入磺酸功能性基团，得到磺酸功能性材料TDCOF60SO3Li，最后利用溶液浇筑法制备得到COFs/PEO复合电解质薄膜。结果表明，复合电解质薄膜在30 ℃下的锂离子电导率为1.03 × 10-4 S/cm，电化学窗口高达5.26 V，同时展现出良好的界面稳定性和抑制锂枝晶生长的能力，在实际应用中展现出较大的应用潜力。

Covalent organic frameworks (COFs) possess the orderliness characteristic of inorganic materials and the flexibility in polymer structure design, along with excellent thermal stability and an ordered pore structure, which have shown great potentials for application in the field of solid-state electrolytes. The reported sulfonate-functionalized COFs exhibit strong electronegativity, a high degree of charge delocalization and excellent ion dissociation ability, which have garnered significant attention. However, the reported sulfonate-functionalized COFs possess a single structure, which significantly restricts their capacity to enhance electrolyte performance and impedes further advancement in this field. In this study, TDCOF60CHO containing active aldehyde anchoring sites was first prepared. Afterwards, by employing post-modification strategy, sulfonate functional groups were introduced into the pore walls of COFs to obtain the functional TDCOF60SO3Li. Finally, COFs/PEO composite electrolyte thin films were fabricated via the solution casting method. As a result, the lithium-ion conductivity was 1.03×10-4 S/cm at 30 ℃, accompanied by an electrochemical window of up to 5.26 V. Simultaneously, it demonstrated excellent interfacial stability and the capacity to inhibit the growth of lithium dendrites, indicating significant potential for practical applications.

基金项目：

国家重点研发计划(2023YFC3008702)；应急管理部重点科技计划(2025EMST110301)；国家消防救援局科技计划(2024XFCX17)；江西省自然科学基金（20232BAB214031， 20242BAB25237）

作者简介：

王英姑（1990-），女，讲师，研究方向为有机多孔材料功能应用研究

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