Electrochemical testing is a method used to study the electrical properties of materials and chemical reactions. It involves measuring the current and voltage in a system to understand how substances interact with each other. This technique is commonly used in fields like battery research, corrosion studies, and sensor development. During electrochemical testing, a sample is placed in an electrolyte solution, and electrodes are used to apply a voltage. The resulting current flow provides insights into the material's behavior, such as its conductivity and reactivity. This information is crucial for improving technologies like fuel cells and supercapacitors.