Gas transport in vertically-aligned carbon nanotube/parylene composite membranes

Sputtered manganese oxide thin film on carbon nanotubes sheet as a flexible and binder-free electrode for supercapacitors

“…Different carbon-based materials were used as electrode materials in EDLCs. [6][7][8][9][10][11][12][14][15][16] Carbon nanotubes (CNTs) are considered as excellent electrode materials for EDLCs supercapacitors because of their high electrical conductivity, large surface area, and good mechanical properties. [7][8][9]17 However, devices with electrodes made of only CNTs have low specific capacitance and low energy density.…”

“…21 To overcome the shortcomings of both types (namely, the low specific capacitance of CNTs in EDLCs and the poor conductivity of MnO 2 in pseudocapacitors), several researchers combined them to form composite materials with better physicochemical properties and higher electrochemical performance. [10][11][12][14][15][16][17][18][19][20]22,23 Different synthesis methods have been used to produce CNTs/MnO 2 composites including coprecipitation, 6 sol-gel, 7 chemical vapor deposition, 8 and electrodeposition 9 techniques. All these methods need the usage of binders and additives to assemble the electrodes in the supercapacitor device, which reduces the specific capacitance.…”

“…All these methods need the usage of binders and additives to assemble the electrodes in the supercapacitor device, which reduces the specific capacitance. [6][7][8][9][10][11][12][14][15][16] Our approach is to deposit thin film of MnO 2 on CNTs sheet by physical vapor deposition (PVD) method to manufacture CNTs/MnO 2 composites. This PVD method is based on directly deposit metal oxide nanoparticles from MnO 2 target on CNTs sheet as substrate by radio frequency (RF) magnetron sputtering.…”

Recent Advances of Gas Transport Channels Constructed with Different Dimensional Nanomaterials in Mixed‐Matrix Membranes for CO2 Separation

“…Unfortunately, the CO 2 /CH 4 selectivity of 2 was obtained. Yang's group fabricated vertically‐aligned CNTs/parylene MMMs through the method of room‐temperature chemical vapor deposition (CVD) ( Figure a,b). CVD growth can be achieved by using ethylene solutions at 815 °C for 10 s at atmospheric pressure.…”

“…a) Schematic of the membrane structure, assembly, and gas flow measurement, b) SEM cross‐sectional image of vertically‐aligned CNTs, c) TEM image of CNTs, the inset shows the histogram of inner diameters of CNTs, and d) HRTEM image of CNTs. Reproduced with permission . Copyright 2014, Elsevier.…”