Simple battery-powered potentiostat-galvanostat with increased output voltage range

The authors have developed and tested a simple battery potentiostat-galvanostat for electrochemical measurements. The device is designed to maintain a specified value of the potential relative to the reference electrode in the distributed method of electrochemical impedance spectroscopy. This method is widely used to determine the characteristics of oxide layers anodically formed on the surface of metals, to investigate processes occurring at the interface and to establish the mechanism of electrochemical reactions. Autonomous powering of the developed device allows to avoid the penetration of interference into the measuring bridge from the AC network through the polarizing circuit. The element base used makes the potentiostat-galvanostat inexpensive and available for making by local researchers. The device has the ability to control by computer and provides a wide range of output voltage. Studies have shown stable and reliable operation of the developed device.