Transition metal doped poly(aniline-co-pyrrole)/multi-walled carbon nanotubes nanocomposite for high performance supercapacitor electrode materials

Preparation of mulberry-like RuO2 electrode material for supercapacitors

“…The electrochemical characteristics of the RuO 2 were measured in a three-electrode system. The RuO 2 electrode was the working electrode, calomel electrode was the reference electrode, and platinum electrode was used as counter electrode [31,32], and the electrolyte was 1 molÁL -1 H 2 SO 4 aqueous solution [33]. Cyclic voltammetry (CV) was used to test the electrochemical properties of electrode materials [34,35] by recording the current as a function of electrode potential or time.…”

Nanostructured manganese oxides electrode with ultra-long lifetime for electrochemical capacitors

“…A typical Nyquist plot contains a semicircle at higher frequencies that corresponds to the limited chargetransfer process, and a linear region at lower frequencies due to Warburg resistance (W), which is a result of the frequency dependence of ionic diffusion/transport in the electrolyte and to the surface of the electrode. [57][58][59] For ideal capacitive behavior, the plot in low frequency region is supposed to be parallel to the imaginary Z-axis. Moreover, the intercept in the x-axis of a Nyquist plot gives the total internal resistance (R s ) that is the combination of the ionic resistance of the electrolyte, intrinsic resistance of the substrate and contact resistance between the active material and the current collector.…”

Structural analysis and dielectric relaxation mechanism of conducting polymer/volcanic basalt rock composites

“…Among them, polypyrrole (PPy) and polythiophene (PT) are two of the most preferred CPs due to their easy and low cost fabrication, high electrical conductivity and good thermal and environmental stabilities [5]. Furthermore, their electrical conductivity, electrochemical performances and magnetic properties can be developed successfully by doping with various dopants [6] or constructing organic/inorganic composite structures [7][8][9][10][11][12][13][14]. For instance, it has been shown that boric acid can be a good candidate for controlling the electrical conductivity of PPy [6].…”

“…Shen et al [12] have shown that PPy coating positively affects the electrical * E-mail: kilic-m@hotmail.com conductivity of z-type barium ferrite/silica composites. Additionally, PPy has also been suggested as a unique material for the improvement of device applications such as in supercapacitor [8] and sensor structures [9]. It has been clearly reported that CPs have a crucial importance for improving performance of the technological applications.…”