本项目提出“双牺牲层”分步剥离的应力释放卷曲纳米技术路线，构筑石墨烯/Fe3O4/石墨烯（G/Fe3O4/G）三层纳米膜卷曲管，作为锂电负极材料，用于SEI膜和赝电容效应研究。旨在以纳米膜良好的弯曲性能和机械性能缓冲锂化/脱锂应力，以纳米膜卷曲管内部空腔容纳体积膨胀，延缓材料结构碎裂粉化，延长循环寿命；利用两侧表面的石墨烯保护层减轻电解液对内层Fe3O4纳米膜的侵蚀，形成致密稳定的SEI膜，延缓容量衰减，提高循环稳定性；表征、量化G/Fe3O4/G三层纳米膜卷曲管的赝电容效应对提高倍率性能和功率密度的贡献。本项目提出的G/Fe3O4/G三层纳米膜卷曲管结构模型也可以推广到其他电极材料，为设计高性能的锂离子电池电极材料提供新的设计思想。

An efficient route of “two sacrificial layers” assisted strain-engineered rolled-up nanotechnology is proposed herein to fabricate rolled-up Graphene/Fe3O4/Graphene (G/Fe3O4/G) trilayer nanomembrane tubular architechures as anodes of LIBs for SEI layer and pseudocapacitance investigation. The superior bendability and mechanical feature of nanomembranes can buffer the strain of lithiation/delithiation to postpone the structure pulverization of electrode materials. The Graphene nanolayers on both surfaces of Fe3O4 nanomembranes will protect the electrodes from the erosion of electrolyte to form stable SEI layers, which is crucial to improve cycling stability. The pseudocapacitance of the rolled-up nanomembranes will be experimentally characterized and quantified to evaluate its role in improving rate capability and power density of LIBs. With G/Fe3O4/G as a proof-of-concept, the outcome of this project will contribute to the design of high-performance electrode materials for LIBs.