CREATION OF A CHEMICAL CURRENT SOURCE USING REDOX REACTIONS IN THE "IODINE-IODIDE" SYSTEM

Abstract

Introduction. Chemical current sources play an important role in energy supply systems that are closely related to everyday life. The ever-increasing dependence on electricity creates a huge demand for appropriate energy storage devices. The purpose: The aim of the work is to create a chemical current source based on the use of the "red – ox" iodine-iodide system and to determine the patterns of formation of electromotive force (EMF) and short-circuit current (short-circuit current) in water solutions depending on the concentration of ions. Objects. The experiments are carried out by measuring the EMF formed between graphite electrodes and SCC. A special installation has been assembled, consisting of an electrolyzer with separated electrode spaces, an ammeter, a voltmeter and graphite electrodes. Solutions of iodine and potassium iodide served as the electrolyte. Results. In an electrolyzer, the electrode spaces of which are separated by an anionite membrane, when one of the spaces is filled with a solution of iodine and the other with potassium iodide, an EMF is formed between the graphite electrodes. Under optimal conditions, the EMF and SCC values will be higher than 135 mV and 10 mA, respectively. Conclusion. The possibility of forming a chemical current source using the "red – ox" iodine-iodide system is shown. The patterns of EMF and SCC formation and their changes depending on ion concentrations are revealed. The results of the study show that "red – ox" systems of alternating valent elements can be used to create flowing chemical current sources with increased electrical capacity