Carbon nanotube (CNT) film is a favorable kind of substrate in flexible electric devices because of its superior flexibility, favorable mechanical strength and excellent electrical conductivity. Moreover, since conductive polymer polyaniline (PANI) owns high capacitance and easy manufacture method, it is always 10 in favor for the supercapacitors. In this research, CNT film synthesized via floating catalyst chemical vapor deposition method could be further activated by electrochemically re-expanding to achieve better porosity and higher specific area, in order to obtain all-solid-state flexible supercapacitor with higher area capacitance. Comparing with the pristine CNT film characterized by PANI, electrochemically fabricated CNT hydrogel film with PANI deposition had higher specific area capacitance, which was 680 mF cm -2 at 15 1 mA cm -2 . All-solid-state supercapacitor that was synthesized by this composite film exhibited high specific area capacitance of 184.6 mF cm -2 at 1 mA cm -2 , which was higher than many similar supercapacitors. The rolling test showed that this supercapacitor maintained its high capacitance even in the rolling condition. After 500 charge-discharge cycles, it also remained high Coulombic efficiency and specific area capacitance. This all-solid-state supercapacitor shows great potential for energy storage 20 device.CNT film prepared via floating catalyst CVD method was activated by electrochemical strategy for better PANI growth. Both of this CNT/PANI hydrogel film electrode and flexible symmetric supercapacitor based on this electrode material exhibited high areal capacitance.

Imprinting nanopatterns on flexible substrates has diverse applications in advanced fabrication. However, the traditional thermal nanoimprint lithography (T‐NIL) often causes shrinkage upon cooling. Here, a simple yet versatile method is introduced to fabricate multiple nanopatterns on a flexible substrate coated with an azopolymer by combining athermal nanoimprint lithography (AT‐NIL) and photolithography. The azopolymer has various mechanical properties upon photoirradiation: 1) phototunable glass‐transition temperatures (Tg) and concomitantly photoinduced switch from glassy plastic to viscoplastic polymer; 2) prominent modulation of viscoplasticity under light illumination at different wavelengths. Regionally selective multiple nanopatterns are conveniently fabricated, presenting angle‐dependent structural color images on poly(ethylene terephthalate) (PET) substrates. The flexible, athermal and multiple nanopatterning method has the potential for on‐demand fabrication of complex nanopatterns.

A novel comb-like copolymer solid electrolyte with a relatively high ionic conductivity, 10 −3.9 S•cm −1 at 30°C and 10 −3.1 S•cm −1 at 80 °C, is prepared by free racial polymerization in this study. The polymer consists of methacrylate as backbone and a mixture of hexadecal (C 16)/methoxyl terminated oligo(ethylene oxide) at a certain ratio as side chains. Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) analysis reveal that non-polar unit (C 16) end-modification not only greatly increases the mobility of the ethylene oxide(EO) chains, but also suppresses their local crystallization behavior by interrupting the regular arrangement, therefore improving the conductivity of the obtained electrolyte.

Ultrathin NiCo2O4 nanosheets directly grown on one-dimensional CNTs, as high-performance electrode materials for supercapacitors, were synthesized through a facile chemical co-deposition process combined with post-calcination in air.