Flexible and conductive MXene films and nanocomposites with high capacitance
Abstract
Two-dimensional transition metal carbides (MXenes) offer a quite unique combination of excellent mechanical properties, hydrophilic surfaces, and metallic conductivity. In this first report (to our knowledge) on MXene composites of any kind, we show that adding polymer binders/spacers between atomically thin MXenes layers or reinforcing polymers with MXenes results in composite films that have excellent flexibility, good tensile and compressive strengths, and electrical conductivity that can be adjusted over a wide range. The volumetric capacitances of freestanding Ti3C2Tx MXene and its composite films exceed all previously published results. Owing to their mechanical strength and impressive capacitive performance, these films have the potential to be used for structural energy storage devices, electrochemical actuators, radiofrequency shielding, among other applications.
- Publication:
-
Proceedings of the National Academy of Science
- Pub Date:
- November 2014
- DOI:
- 10.1073/pnas.1414215111
- Bibcode:
- 2014PNAS..11116676L