Hierarchical Ti3CNTx/CNF composite films with expanded interlayer spacing for high-performance flexible micro-supercapacitors
Abstract
The practical energy storage application of two-dimensional (2D) MXenes is fundamentally constrained by the restacking of nanosheets, which severely impedes ion transport kinetics. Here, we demonstrate a strategy to mitigate this issue by intercalating one-dimensional cellulose nanofibers (CNFs) into 2D Ti3CNTx MXene films, creating a hierarchical composite architecture. The CNF spacers effectively expand the interlayer spacing of the Ti3CNTx from 1.326 to 1.448 nm, significantly increasing the specific surface area from 43.0 to 160.1 m2 g−1. This structurally engineered film, when used as an electrode, exhibits a high specific capacitance of 441.6 F g−1. Flexible micro-supercapacitors fabricated from this composite deliver an impressive energy density of 6.2 mWh g−1 and demonstrate exceptional mechanical robustness. This work provides a scalable approach to engineering the nano-architecture of 2D materials for advanced flexible energy′ storage devices.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (8)
Chenggang Jia
Shulin Yang
Guangxi Key Laboratory of Electrochemical Energy Materials, Center on Nanoenergy Research, School of Physics Science and Technology, Guangxi University , Nanning 530004,
Jiang Liu
Yubing Li
Tangming Mo
State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Mechanical Engineering
Haifu Huang
Guangxi Novel Battery Materials Research Center of Engineering Technology, Guangxi Key Laboratory of Electrochemical Energy Materials, Carbon Peak and Neutrality Science and Technology Development Institute, School of Physics Science and Technology, Guangxi University , Nanning 530004,
Zhiqun Tian
Guangxi Key Laboratory of Electrochemical Energy Materials, Center on Nanoenergy Research, School of Physics Science and Technology, Guangxi University , Nanning 530004,
Shuaikai Xu
Guangxi Key Laboratory of Electrochemical Energy Materials, Center on Nanoenergy Research, School of Physics Science and Technology, Guangxi University , Nanning 530004,