In this paper, the possibility of using a composite material consisting of PEDOT:PSS and a network of oriented nickel fibers distributed in a polymer matrix as an electrode for alternative energy devices was investigated. The correlation between the electrochemical and optoelectric characteristics of the GC/PEDOT:PSS and GC/NiSFs/PEDOT:PSS electrodes was studied using electrochemical methods (cyclic voltammetry, electrochemical impedance spectroscopy). The mechanisms of electrochemical reactions in the GC/PEDOT:PSS and GC/NiSFs/PEDOT:PSS systems were studied using cyclic voltammetry at different scan rates, and the stages limiting these processes were determined. Based on the oxidation and reduction potentials for the developed electrodes, the band gap was calculated. The band gap value for GC/PEDOT:PSS was 1.34 eV. Introducing the oriented nickel fiber network into the PEDOT:PSS matrix resulted in a slight decrease in the band gap of the GC/NiSFs/PEDOT:PSS electrode, which was 1.31 eV. This confirms that the optical properties of the material remain practically unchanged. The electrical properties of the GC/PEDOT:PSS and GC/NiSFs/PEDOT:PSS electrodes were studied using impedance spectroscopy. The obtained results show that the inclusion of a nickel fiber network in the polymer film leads to a slowdown in the charge transfer process in the GC/NiSFs/PEDOT:PSS system, which is confirmed by an increase in the charge transfer resistance Rct to 170.9 Ohm compared to 131.5 Ohm for pure GC/PEDOT:PSS. Based on the analysis of the obtained data, it can be stated that the composite material based on PEDOT:PSS and a network of oriented nickel fibers is promising for use in optoelectronic devices and energy systems.
G.R. Nizameeva (Wed,) studied this question.