基于细菌纤维素的高导电碳气凝胶集流体的宏量制备和应用

具有三维网络结构的纳米碳气凝胶具有低密度、高孔隙率、大比表面积、高导电率和化学稳定性等优异性能，因此吸引了研究者广泛的关注。本项目基于细菌纤维素这种环境友好、可再生和来源丰富的生物质材料，探索宏量制备高导电碳气凝胶集流体的路线并研究其应用。.本项目拟通过调控细菌纤维素的掺杂方式、干燥方式和热解方式，设计较为节能和廉价的前驱物处理和热解路线，实现碳气凝胶的宏量制备，揭示相关处理手段提升碳气凝胶产率的机理。细菌纤维素具有相互交联的纤维素纳米纤维三维网络，通过优化热解化学过程，使得产物完美地继承细菌纤维素固有的微观网络结构，产物碳气凝胶可以获得三维强韧的连续网络结构，将同时具有优异的机械性能和导电性。.本项目拟探索高导电碳气凝胶作为集流体的应用潜力，用于电容去离子装置或锂离子电池，综合高导电碳气凝胶集流体的表征和性能结果，建立结构与性能间的构效关系，指导碳气凝胶的未来优化。

Nanocarbon aerogels with three-dimensional network structure have attracted extensive attention due to their excellent properties such as low density, high porosity, large surface area, high conductivity and chemical stability. Based on bacterial cellulose, an environmentally friendly, renewable and abundant biomass material, the project explores the route of large-scale preparation of highly conductive carbon aerogel current collector and its application..To realize the scale-preparation of carbon aerogel, the project designs a more energy-efficient and inexpensive precursor treatment and pyrolysis route by adjusting the impregnation method, drying method and pyrolysis method of bacterial cellulose. Bacterial cellulose has a three dimensional network of cross-linked cellulose nanofibers. By optimizing pyrolysis process, the product can inherit the natural network structure of bacterial cellulose perfectly. The product carbon aerogels can obtain three-dimensional, tough and continuous network structure, thus possessing excellent mechanical properties and conductivity simultaneously..The project explores the application potential of high conductivity carbon aerogels as a current collector in capacitive deionization devices or lithium ion batteries. The characterization and performance results of high conductivity carbon aerogels are integrated, and the structure-activity relationship is established to guide the future optimization of carbon aerogels.