Zheng Ling1,2,3, Chang E. Ren1,3, Meng Zhao1,3, Jian Yang1,4,3, James Giammarco1,3, Jieshan Qiu2, Michel W. Barsoum1,3, Yury Gogotsi1,3
1A. J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA 19104;
2Carbon Research Laboratory, Liaoning Key Laboratory for Energy Materials and Chemical Engineering, State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China; and
3Department of Materials Science and Engineering, and
4College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
Tóm tắt
Significance
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 Ti
3
C
2
T
x
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.
