- Address
- 305-0047 茨城県つくば市千現1-2-1 [アクセス]
研究内容
出版物2004年以降のNIMS所属における研究成果や出版物を表示しています。
電子・光機能材料研究センター
CNT-MXene membranes for electrochemical energy storage applications
2D MXenes, Carbon nanotubes (CNTs), CNTs dispersion, Electrochemical properties, Li-O2 batteries
概要
• Superior prospect of 2D MXenes for electrochemical energy storage applications.
• Restacking and agglomeration of MXenes considerably limit their true potential for fast ion transport.
• CNTs were dispersed to control the structure and porosity of MXene membranes.
• CNT–MXene hybrid membranes show dramatically improved Li-ion transport properties.
新規性・独創性
• A scalable method to fabricate ultralight yet continuous CNT–MXene membranes with uniform/3D CNTs dispersion.
• Correlation among CNTs content, surface microstructure, MXenes’ stacking structure & ion transport properties of the films.
• Li-ion transport mechanisms in the CNT–MXene membranes.
• MXene membranes with tunable 2D and 3D structures with improved ion-transport performances.
• Potential application of selected CNT–MXene ultralight membranes as interlayers for Li-O2 batteries.
内容
• The compact surface microstructure of MXene membranes is dramatically changed as CNTs occupy MXene/MXene edge interfaces.
• The 2D stacking order of MXenes is preserved up to 30 wt% CNTs.
• The 2D alignment is completely disrupted at 40 wt% CNTs, and a more pronounced surface opening and internal expansion of ~770% are realized.
• Both 30 wt% and 40 wt% membranes show stable cycling performance under a significantly higher current density due to faster transport channels.
• Notably, for the 3D 40 wt% membrane, over-potential during repeated Li deposition/dissolution reactions is further reduced by another ~50%.
• Ultralight yet continuous hybrid films comprising up to ~0.027 mg/cm2 Ti3C2 MXene can be prepared using aqueous colloidal dispersions and vacuum filtration for specific applications
まとめ
• A method to fabricate ultralight yet continuous CNT–MXene membranes for electrochemical energy storage applications.
• Inexpensive multi-walled CNTs control the structure of MXene membranes and improve their ion-transport properties.
