细菌纤维素三维结构性电极粘结体系的微生物合成与性能研究

纳米材料独特的尺寸效应使其在电学、力学等诸多领域表现出独特的性能。如何将纳米材料组装成宏观材料并保持其纳米尺度的优异性能，是纳米材料获得实际应用的关键，也是目前面临的重要挑战之一。例如对电极材料而言，采用粘结剂将电极活性材料组装形成宏观电极的过程是影响电极性能的关键。然而，在传统的电极组装过程当中，宏观电极性能常常由于活性材料颗粒分散不均匀、微纳结构被破坏等原因而受到限制。申请人前期发展了一种气溶胶辅助生物合成纳米复合材料的技术，能够成功制备系列具有三维网络结构的细菌纤维素纳米复合材料。基于此，本项目拟继续发展该方法，并将其应用于电极材料粘结领域，研究发酵条件对微生物产生纳米尺度三维细菌纤维素网络结构的影响及其规律，探究细菌纤维素三维结构性粘结体系的内在传质机理，建立三维结构性粘结体系与电极电化学及力学性能的结构-性能关系。期望为新型高性能电极的设计和构建提供新的思路与方法。

The unique size effect endows nanomaterials with excellent properties in many fields such as electricity and mechanics. How to assemble nanomaterials into macroscopic materials and maintain their excellent properties at the nanoscale is the key to their practical application, and it is also one of the important challenges of this field. For example, the process of assembling the electrode active material to form a macroscopic electrode with binder has great influence on the electrode performance. However, in the traditional electrode assembly process, the performance of the electrode is often limited by the uneven dispersion of active material particles and the destruction of their micro-nano structure. The applicant has developed an aerosol-assisted biosynthesis nanocomposite technology, which can successfully fabricate a series of bacterial cellulose nanocomposite materials with three-dimensional networks. Based on this, this project intends to continue to develop this method and apply it to the field of electrode material bonding. Meanwhile, in this project, we will explore the influence of fermentation conditions on the nanoscale three-dimensional bacterial cellulose network structure produced by microorganisms, as well as the internal mass transfer mechanism in this three-dimensional structure of bacterial cellulose. Finally, we will establish the structure-performance relationship between the three-dimensional structural adhesive system and the electrochemical and mechanical properties of the electrode. It is expected to provide new ideas and methods for the design and construction of new high-performance electrodes.