Temperature-Dependent Fractional Dynamics in Pseudo-Capacitors with Carbon Nanotube Array/Polyaniline Electrodes

Nanomaterials

Igor O. Yavtushenko¹  Marat Yu. Makhmud-Akhunov¹  Evgeny P. Kitsyuk²  Renat T. Sibatov²  Vyacheslav V. Svetukhin² 

[1] Laboratory of Diffusion Processes, Ulyanovsk State University, 432017 Ulyanovsk, Russia;Scientific-Manufacturing Complex “Technological Centre”, 124498 Moscow, Russia;

关键词: pseudocapacitor;    carbon nanotube;    polyaniline;    fractional-order circuit model;    memory effect;    fractional derivative;   

DOI  :  10.3390/nano12050739

来源: DOAJ

【 摘 要 】

Pseudo-capacitors with electrodes based on polyaniline and vertically aligned multiwalled carbon nanotubes (PANI/VA-MWCNT) composite are studied. Fractional differential models of supercapacitors are briefly discussed. The appropriate fractional circuit model for PANI/MWCNT pseudo-capacitors is found to be a linearized version of the recently proposed phase-field diffusion model based on the fractional Cahn–Hilliard equation. The temperature dependencies of the model parameters are determined by means of impedance spectroscopy. The fractional-order $\alpha$ is weakly sensitive to temperature, and the fractional dynamic behavior is related to the pore morphology rather than to thermally activated ion-hopping in PANI/MWCNT composite.

【 授权许可】

Unknown