双网络金属凝胶的构筑及其在柔性储能器件中的应用

Gel materials based on metal-ligand coordination chemistry are rich in redox activity and optical properties, etc., and the flexible coordination ability between metal ions and ligands endow the gels excellent self-healing ability. However, the insufficient performances such as flexibility and mechanical strength have become important issues that need to be solved in expanding the application fields and developing the intelligent repairing, safe and durable gel materials. This project is based on the design of metallic complex gels with high-strength properties and combine the self-healing metallic gels as coordination polymer with the rigid network structure to obtain the new double network gels materials. In this way, the self-healing, multi-response properties of the metallic gels and the superior mechanical properties of the double-network gel will be effectively combined. The morphology, mechanical properties and self-healing properties of the gel will be systematically studied to reveal the formation mechanism of metallic gels, and explore the degree and regularity of self-healing properties in double-network metallic gels. And further explore the function of dual-network metallic gels in the flexible energy storage devices. The project will offer novel ideas for the construction of complex metallic gels and extend the application fields of metallic gels as the smart materials.

基于金属配体配位化学构筑的凝胶材料具有独特的氧化还原活性、光学等性质，并且金属离子与配体之间灵活的配位方式更赋予这类材料优异的自愈合能力，但柔韧性、机械强度等性能的不足成为拓展其应用领域，发展智能修复性、安全耐久性凝胶材料亟需解决的重要问题。本项目以构筑高强度金属复合凝胶为设计理念，将自愈合金属凝胶作为配位聚合物，与刚性网络结构相结合，融合金属凝胶的自愈合、多响应等性能以及双网络凝胶优越的力学性质，构建功能集成的新型双网络金属凝胶。对凝胶的微观形貌、力学性能、自愈合等性质进行系统考察，揭示金属凝胶的形成机理，阐明其自愈合性由金属凝胶向双网络金属凝胶有效传递的程度及规律，探索双网络金属凝胶在柔性储能器件中的应用。项目的开展将为构筑金属复合凝胶提供新的思路，拓展金属凝胶在智能材料领域的应用范围。

开发智能修复性、安全耐久性的凝胶材料是将其应用于柔性储能器件领域亟需解决的重要内容，而只依赖分子之间物理交联或共价交联均难以保证凝胶表现出优越的延展性以及自愈合等综合性能。本项目根据金属凝胶体系高度可调的构筑方法和高强度的双网络凝胶理念，利用金属离子、金属团簇、无机纳米材料、聚合物网络间的配位作用、静电作用以及氢键等相互作用，获得了一系列稳定性高、自愈合性强、力学性能优良的双网络金属凝胶；结合力学、流变学、微观形貌表征、电化学测试以及理论计算对复合凝胶的自愈合性质、机械强度以及电化学性能进行系统探究，总结复合凝胶的形成、自愈合机理及性质影响规律；探究了将其作为凝胶电解质在水系锌离子电池及柔性储能器件中的应用。本项目为金属双网络凝胶的设计及其在柔性储能领域的应用研究提供了新的实验思路和理论依据。