1 research outputs found
Omnidirectionally Stretchable High-Performance Supercapacitor Based on Isotropic Buckled Carbon Nanotube Films
The
emergence of stretchable electronic devices has attracted intensive
attention. However, most of the existing stretchable electronic devices
can generally be stretched only in one specific direction and show
limited specific capacitance and energy density. Here, we report a
stretchable isotropic buckled carbon nanotube (CNT) film, which is
used as electrodes for supercapacitors with low sheet resistance,
high omnidirectional stretchability, and electro-mechanical stability
under repeated stretching. After acid treatment of the CNT film followed
by electrochemical deposition of polyaniline (PANI), the resulting
isotropic buckled acid treated CNT@PANI electrode exhibits high specific
capacitance of 1147.12 mF cm<sup>–2</sup> at 10 mV s<sup>–1</sup>. The supercapacitor possesses high energy density from 31.56 to
50.98 μWh cm<sup>–2</sup> and corresponding power density
changing from 2.294 to 28.404 mW cm<sup>–2</sup> at the scan
rate from 10 to 200 mV s<sup>–1</sup>. Also, the supercapacitor
can sustain an omnidirectional strain of 200%, which is twice the
maximum strain of biaxially stretchable supercapacitors based on CNT
assemblies reported in the literature. Moreover, the capacitive performance
is even enhanced to 1160.43–1230.61 mF cm<sup>–2</sup> during uniaxial, biaxial, and omnidirectional elongations