Frequency dependence of conductivity of ethylene carbonate based electrolyte for Li-ion battery |
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Authors: | S. N. Shkerin I. A. Profatilova J. H. Lee |
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Affiliation: | (1) Corporate R&D Center, Samsung SDI Co. Ltd., 575, Shin-dong, Yeongtong-gu, Suwon-si, , Gyeonggi-do, Republic of Korea, 443-731 |
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Abstract: | Specific cell arrangement corresponding to four probe pouch cell with two reversible current and two indifferent potential electrodes is applied to study the existence of frequency dependence on conductivity of a medium between two potential electrodes, i.e., separator impregnated with electrolyte. It is established that frequency dependence of conductivity for carbonate-based electrolyte solution does exist. Series resistance is found to be in a good agreement by specific value with that reported earlier. Low frequency limit of impedance spectra is a few decimal orders higher than that of series resistance. Both low- and high-frequency resistances increase with the interelectrode distance in agreement with Ohm law. |
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Keywords: | Impedance spectroscopy Li-ion battery Electrolyte resistance |
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