Abstract
The oriented coral-like polyaniline (PANI) nano-arrays for the all-solid-state supercapacitor was successfully synthesized by using a three-step galvanostatic technology in the absence template. The average diameter and length of PANI nano-rod after 6h growing were about 30nm and 400nm, respectively. The formation mechanism of vertically oriented coral-like PANI nano-arrays was proposed based on the electrostatic potential surface. Compared with SO42− ions, ClO4− ions resulted in more regular surface charge distribution, which remarkably improved the order degree of coral-like PANI nano-arrays. The specific capacitance of supercapacitor made of this nano-arrays reached about 537F/g at a current density of 3A/g and retained about 84.8% of their initial value even in a 120° bending state, and the symmetrical all-solid-state supercapacitor device using polyvinyl alcohol (PVA/H2SO4) as solid electrolyte retained 93.9% of its initial value even in a 120° bending state. It indicates that such a PANI nano-arrays should be promising materials for the flexible and portable energy storage device.
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