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dc.contributor.authorThapa, Arun
dc.contributor.authorGao, Hongwei
dc.identifier.citationThapa, A., & Gao, H. (2022). Low-frequency Inductive Loop and Its Origin in the Impedance Spectrum of a Graphite Anode. Journal of The Electrochemical Society, 169(11), 110535.en_US
dc.descriptionCopyright The Electrochemical Society 2022en_US
dc.description.abstractGraphite is a well-known anode material for commercial lithium-ion batteries, and its physical and electrochemical properties have been studied extensively. However, the origin of an inductive loop observed in the low-frequency region of the Nyquist complex plane impedance spectrum of the graphite anode has been widely debated and attributed to contrasting reasons. This paper investigates the impedance spectrum of the graphite anode at various states of charge (SoCs) using three-electrode galvanostatic Electrochemical Impedance Spectroscopy (EIS) and further explores the impedance response of the electrolyte as a function of frequency. The graphite anode EIS measurement displayed an inductive loop in the low-frequency region for almost entire SoCs, irrespective of the solid electrolyte interphase (SEI) age. To study the origin of this inductive loop in the graphite impedance spectrum, we fabricated a three-electrode pouch cell with graphite and NMC electrodes and estimated the electrolyte impedance in the frequency range from 1 MHz to 0.05 Hz. The electrolyte impedance at low frequencies exhibited inductive behavior, indicating a significant role of the electrolyte in the origin of the inductive characteristic in the low-frequency region of the graphite EIS spectrum.en_US
dc.publisherThe Electrochemical Societyen_US
dc.rightscopyright The Electrochemical Society 2022en_US
dc.subjectlithium-ion batteryen_US
dc.subjectelectrochemical impedance spectroscopyen_US
dc.subjectelectrolyte impedanceen_US
dc.subjectthree-electrode lithium-ion cellen_US
dc.titleLow-frequency Inductive Loop and Its Origin in the Impedance Spectrum of a Graphite Anodeen_US
mus.citation.journaltitleJournal of The Electrochemical Societyen_US
mus.relation.collegeCollege of Engineeringen_US
mus.relation.departmentComputer Science.en_US
mus.relation.universityMontana State University - Bozemanen_US

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