材料科学
堆积
石墨烯
异质结
氧化物
纳米技术
阳极
电极
储能
图层(电子)
电磁屏蔽
复合材料
光电子学
冶金
量子力学
物理
物理化学
功率(物理)
化学
核磁共振
作者
Meng‐Qiang Zhao,Nicholas Trainor,Chang E. Ren,Michelle Torelli,Babak Anasori,Yury Gogotsi
标识
DOI:10.1002/admt.201800639
摘要
Abstract Stacking different 2D materials is a promising strategy to fabricate heterostructures that combine the advantages and eliminate the associated shortcomings of individual building blocks. When used for energy storage, 2D heterostructures provide the opportunity to manufacture flexible and conductive paper electrodes, which require no binders, conductive additives, or current collectors. Here, 2D MXene/graphene heterostructured papers are manufactured by alternately stacking Ti 3 C 2 T x MXene and reduced graphene oxide (rGO) nanosheets using spray‐assisted layer‐by‐layer assembly. Up to letter paper–sized free‐standing films can be manufactured within half an hour of spraying. When used directly as anodes for Na‐ion storage, the MXene/rGO heterostructured films exhibit improved electrochemical performance compared to pure MXene and rGO films in terms of capacity, rate performance, and cycling stability. Capacities of ≈600 mAh g −1 are achieved by the Ti 3 C 2 T x MXene—20 wt% rGO heterostructured films at 0.25 C (≈220 mAh g −1 at 2.5 C) along with excellent cycling stability. This work demonstrates the advantages of 2D heterostructures and possibility of large‐scale manufacturing of MXene‐based materials for energy, separation, electromagnetic interference shielding, and biomedical applications.
科研通智能强力驱动
Strongly Powered by AbleSci AI