Electrochemical Impedance Analysis on Degradation of Commercially Available Lithium Ion Battery during Charge–Discharge Cycling

Abstract

The degradation of the commercial Li ion battery was analyzed by electrochemical impedance spectroscopy, where our previous proposed equivalent circuit was applied. The degradation with the cycling was clearly explained by the main parameters of capacitive and resistive components, i.e., it responded until 300 cycles to the decrease in capacitive component, while after 300 to 550 cycles to the increase in resistive component.A detection of the state of the degradation of batteries is one of the most important issues for energy storage systems. Electrochemical impedance spectroscopy (EIS) is the most effective method of nondestructive investigation for batteries. To detect the degradation using the EIS, efforts have been made by various groups. 14 We already proposed an equivalent circuit for a wide range of impedance spectra. 5 The equivalent circuit was newly redesigned for the analysis of the lithium ion battery (LIB) with consideration of the contributions of a variety of diffusion parameters resulting from the various particle sizes for the cathode and the solid-electrolyte interphase (SEI) formed on the anode particles, as well as electrochemical reactions and inductive components. 6 In addition, the sensitive assessment of residual errors resulting from the data fitting demonstrated the validity of the proposed circuit including the SEI component. The electrochemical impedance of the electrodes in a commercial LIB at various states of charge was analyzed to evaluate the proposed circuit.In this study, we focused on an analysis using the impedance fitting technique on the basis of our previously proposed equivalent circuit for the degradation or the capacity fading of LIB with the chargedischarge cycling.A commercially available prismatic LIB (Panasonic Corporation) with a nominal capacity of 850 mA h for cellular phones was used in this work. Active materials of anode and cathode were graphite and lithium cobaltite (LiCoO 2 ), respectively. The LIB was subjected to electrochemical tests at room temperature. The battery was charged and discharged with a constant current constant voltage (CCCV) protocol between 2.75 and 4.

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

“…Many researchers have used EIS to detect battery degradation [1][2][3][4]. In our previous study, an equivalent circuit for a wide range of impedance spectra was proposed to analyze lithium-ion batteries (LIBs) [5][6][7][8][9][10]. The equivalent circuit was redesigned for the analysis of an LIB with a characteristic electrode shape and electrochemical reactions of the electrode [5].…”

“…The equivalent circuit was redesigned for the analysis of an LIB with a characteristic electrode shape and electrochemical reactions of the electrode [5]. To evaluate the proposed circuit, the electrochemical impedance of the electrodes in a commercial LIB in various states of charge was analyzed [6][7][8]. We expect that this impedance technique will be adopted as the diagnosis technology for batteries in electric vehicles (EV) and large-scale energy storage systems (ESS) [4].…”

New Analysis of Electrochemical Impedance Spectroscopy for Lithium-ion Batteries

“…1,3,19,24,25 However, remarkably, another semicircle appeared at the higher frequency region below 0 o C by focusing carefully on the plots, and the size of the new semicircle was observed to increase with the two others by decreasing the temperature of the LIB, T. Namely, the semicircle at the higher frequency, which was not visibly detected at T of the room temperature, is considered to be apparently detectable by setting T at low temperatures. This is one of the techniques to analyze impedance precisely.…”

“…[1][2][3][4][5][6][7][8][9][10][11][12]17,[25][26][27][28] The conventional EIS measured by a frequency response analyzer (FRA) and potentiostat system is a powerful tool to check the state of LIBs (i.e. SOC and SOH).…”

“…Electrochemical impedance spectroscopy (EIS), in which a small-amplitude sinusoidal potential perturbation is applied to a cell, is one of the most powerful tools for the non-destructive analysis of energy devices such as lithium-ion batteries (LIB) [1][2][3][4] and fuel cells. 5,6 We investigated electrochemical reactions by means of the EIS.…”