生物燃料电池能够将葡萄糖等生物质中的化学能转换为电能，有望从生物体内持续获取能源，解决可植入电子器件能源供给困难的瓶颈。然而，目前可植入生物燃料电池的力学性能与柔软的生物组织不匹配，导致器件和组织之间难以形成稳定的界面，既损伤了组织，也降低了器件性能。受肌肉组织的多级纤维结构启发，本项目拟通过多层次取向组装策略，提出并发展一类与生物组织力学性能匹配的纤维状生物燃料电池。重点以一维碳纳米管为模型，通过干法纺丝进行多层次取向组装制备多级取向碳纳米管纤维，再通过负载不同功能活性材料和催化剂制备得到纤维状生物燃料电池。系统研究多层次取向组装对纤维状生物燃料电池力学性能的调控机制，获得与生物组织相匹配的力学性能。最后，探究纤维状生物燃料电池植入体内后和生物组织的相互作用及其对器件-组织界面动态稳定性和长期稳定性的影响规律，创建出一类可在体内稳定工作的高性能柔性能源器件。

Biofuel cells can convert the chemical energy of biomass, such as glucose, into electrical energy, which are expected to continuously harvest energy from living organisms and tackle the bottleneck issue of energy supply for implanted electronics. However, the mechanical properties of available biofuel cells mismatch those of biological tissues, resulting in an unstable device-tissue interface, which injures the tissue and limits the device’s performance. To this end, mimicking muscle tissue's hierarchical fiber structure, we propose developing a series of fiber-shaped biofuel cells that mechanically match biological tissue by hierarchical and aligned assembly strategy. One-dimensional carbon nanotubes are used as the model to fabricate hierarchical and aligned carbon nanotube fibers by dry spinning. Then the fiber-shaped biofuel cells are prepared by loading different functional active materials and catalysts. The regulation mechanism of hierarchically and aligned assembly on mechanical properties of the fiber-shaped biofuel cell is studied systematically. The mechanical properties matching with biological tissue are thus obtained. Finally, the interaction between the device and biological tissue and its influence on the dynamic and long-term stability of the device-tissue interface are explored, thus developing a class of high-performance and flexible energy devices which can work stably in living organisms.