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Electrochemical Raman (EC-Raman) spectroscopy is a powerful analytical tool that enhances the understanding of the functioning of energy storage devices by monitoring physicochemical changes. This application note describes insights gained from EC-Raman during simulation experiments of charging and discharging nickel-hydrogen batteries.

Portable Series of Electrochemical Analysis Devices from Metronome ● μSTAT-i400: Voltammetry, amperometry, and potentiometric measurements. Can connect 1 or 2 channel electrodes. Battery operated. ● STAT8000P: Voltammetry and amperometric measurements. In multi-channel mode, can connect up to 8 working electrodes and reference electrodes. Battery operated. ● 910PSTAT mini: Ultra-compact potentiostat/galvanostat the size of a smartphone.

Autolab's potentiostat/galvanostat "VIONIS" ● Capable of measuring both research and routine analysis with a single device ● Easily measure routine analyses by streamlining the main analytical methods ● Create original measurement flows using user-friendly command tiles Autolab is a manufacturer of electrochemical measurement devices under the Metrom group. In Japan, Metrom Japan Co., Ltd. serves as the exclusive distributor.

Corrosion applications using potentiostat/galvanostat

Lithium-ion (Li-ion) batteries are one of the most researched energy storage devices due to their relatively high energy levels and excellent power performance. During charging, lithium ions are moved from the positive electrode to the negative electrode through the electrolyte. During discharging, lithium ions move in the opposite direction, from the negative electrode to the positive electrode. At the electrode surface, the diffusion of Li-ions into the bulk occurs. Here, the performance of Li-ion batteries largely depends on the diffusion coefficient of the active materials present in the electrodes. Therefore, knowing the chemical diffusion coefficient of the electrode materials is very important. Additionally, understanding the thermodynamic properties of the electrode materials provides a more detailed insight into their electrochemical behavior.

During the charging and discharging of lithium-ion batteries (Li-ion batteries), lithium ions are transported from one electrode through the electrolyte to the other electrode. Knowing the chemical diffusion coefficient of the electrode materials is very important. The potentiostat intermittent titration technique (PITT) is one of the most commonly used methods to gain insights into the diffusion coefficients of electrode active materials.