基于氧化还原生物分子复合电极材料的储能机制与性能研究

电极材料是决定电化学储能发展的关键因素。然而，当前广泛使用的储能电极材料面临着生物相容性差、制造成本攀升、服役期后难降解等问题。在本项目的前期调研过程中，申请者通过仔细研究细胞膜内外能量代谢机制，发现醌、咯嗪、吩嗪、靛蓝、紫罗碱等5类生物分子在生物体内充当着电子传输的中间体，参与细胞内外能量交换，具备用作环境友好型电化学储能材料的潜能。因此，本项目拟开展这五类氧化还原生物分子的电化学储能机制与性能研究。将采用原位/非原位测试手段，对生物分子充放电前后的结构、元素成分以及价态进行表征，结合理论计算，系统地研究其电化学储能机制；针对生物分子导电性差与易溶解在电解质中的特点，拟构筑基于生物分子的复合电极材料，探索复合体系中分子间作用力、表界面效应对其导电性与稳定性的作用规律；系统地研究基于氧化还原生物分子复合体系的电化学性能，揭示其构-效关系反馈指导活性材料的设计和复合电极的构筑。

Electrode materials paly dominated roles in the development of electrochemical energy-storage system. However, the widely used electrode materials have been faced with the problems of poor biocompatibility, rising manufacturing cost and difficult degradation after service. In the early research process of this project, by carefully studying the mechanism of energy metabolism in biological system, the applicant found biological molecules such as quinone, alloxazin, phenazine, indigo, viologen, etc. serving as the electronic transmission of intermediates in the organism, participating in the energy exchange inside and outside the cells, have the potential of being utilized as environmental-friendly electrochemical energy-storage materials. Therefore, this project intends to carry out research on the electrochemical energy-storage mechanism and properties of these five redox biomolecules. The structure, elemental composition and valence state of biomolecules before and after charge and discharge will be characterized by in-situ/ex-situ testing methods; the electrochemical energy storage mechanism of biomolecules will be systematically studied combining with theoretical calculation; for the poor conductivity and high solubility of biomolecules in electrolyte, composited electrode materials based on biomolecules are proposed to explore the function rules of intermolecular forces and surface interface effects to the conductivity and stability in the composite system; the electrochemical properties of the redox-biomolecules-based composited system will be systematically studied, and the structure-activity relationship will feedback to guide the design of active materials and the construction of composite electrodes.