碳基材料共价固载纳米有机羰基化合物的制备及储锌性能研究

有机羰基化合物（OCCs）具有来源丰富、环境友好和结构多样性等优点，在水系锌离子电池（AZIBs）正极材料中具有广泛的应用前景。但OCCs还存在电导率低、在电解液中易溶解等问题，严重影响电池的循环寿命和倍率性能。针对以上问题，本项目拟基于碳基载体共价固载纳米OCC分子（OCC@C），利用共价键的强作用力抑制OCC的溶解，利用碳材料的高导电性和纳米材料的高比表面积提升反应动力学。项目拟：（1）探究纳米OCC@C复合材料的可控合成方法，揭示复合材料的形貌、结构和组分的影响机制；（2）评估OCC@C的电化学储锌性能及影响机制；（3）原位表征结合理论计算探究OCC@C的电化学反应机理。项目的研究有望揭示共价固载和纳米化对OCC电化学性能的影响机制，为低成本、高稳定性和高倍率储锌正极材料的设计提供新思路，并在一定程度上解决目前有机电极材料普遍存在的一些问题，推动绿色有机锌离子电池的发展。

Organic carbonyl compounds (OCCs) are promising cathode materials for aqueous zinc ion batteries (AZIBs) owing to their abundant sources, environmental friendliness and structural diversity. However, the low conductivity and high dissolvability of OCCs seriously limits their cycle life and rate capability. To solve the above issues, this project plans to covalentally immobilize nanosized OCC molecules on carbon-based materials (OCC@C), aiming to use the strong force of covalent bond to inhibit the dissolution of OCC, and take advantages of the high conductivity of carbon materials and the high specific surface area of nanomaterials to improve the reaction kinetics of the electrode. The project is proposed to: (1) investigate the controllable synthesis strategy of OCC@C, and explore the influence mechanism of morphology, structure, and composition of the composite materials; (2) evaluate the zinc ion storage performance of OCC@C and its influencing mechanism; (3) investigate the electrochemical mechanism of OCC@C through in-situ characterizations combined with theoretical calculations. The proposed research is expected to reveal the effects of covalent bond and nanostructure on the electrochemical performance of OCC@C, provide some new ideas for designing zinc ion storage materials with low cost, high stability, and high rate capability, and solves some common problems of organic electrode materials, and promote the development of green organic AZIBs.