Application of Electrochemical Impedance Spectroscopy to Ferri/Ferrocyanide Redox Couple and Lithium Ion Battery Systems Using a Square Wave as Signal Input

Add time:08/30/2019    Source:sciencedirect.com

To realize electrochemical impedance spectroscopy (EIS) using a simple measurement system, application of a square potential/current waveform to the input signals of EIS was investigated. The impedance of a simple redox reaction of [Fe(CN)6]4−/[Fe(CN)6]3− solution was measured by the potentio-EIS using a square waveform as the input signal, which was generated by a potentiostat system without a frequency response analyzer (FRA). A steady impedance response in the frequency range of 40 Hz–3.5 kHz was obtained, and the impedance was obtained by the potentiostat system with an FRA. The errors—the differences between the impedance measured by EIS with a square potential waveform and that of conventional EIS—were sufficiently low to allow impedance analysis. The impedance of a lithium-ion battery (LIB) was measured by galvano-EIS using a square waveform input signal generated by a power controller. A steady impedance response in the frequency range of 5 Hz–2.5 kHz was obtained, and the errors were sufficiently low to allow impedance analysis. It was demonstrated that both square potential-EIS (SP-EIS) and square current-EIS (SC-EIS) have great potential as simple systems for measuring impedance. Moreover, it was demonstrated that SC-EIS has potential as a simple measurement system for analyzing the state of an LIB. Thus, the potential of the SP/SC-EIS methodology was confirmed for electrochemical systems.

We also recommend Trading Suppliers and Manufacturers of LITHIUM FERROCYANIDE (cas 13601-18-8). Pls Click Website Link as below: cas 13601-18-8 suppliers

Prev:Integrated process for lithium recovery from zinnwaldite
Next:The adsorption of Cs+ from wastewater using lithium-modified montmorillonite caged in calcium alginate beads)