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Determination of the Lithium Ion Diffusion Coefficient in Graphite
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1999
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EngineeringElectrode-electrolyte InterfaceChemistryMineral ProcessingElectrochemical SocietyMaterials ScienceBattery Electrode MaterialsWaburg Impedance ApproachesLithium-ion BatteryEnergy StorageSolid-state BatteryElectrochemistryDiffusion ResistanceComplex Impedance ModelLi-ion Battery MaterialsFundamental ElectrochemistryGrapheneElectrochemical Energy StorageBatteriesAnode Materials
A complex impedance model for spherical particles was used to determine the lithium ion diffusion coefficient in graphite as a function of the state of charge (SOC) and temperature. The values obtained range from of to at 25°C for 0 and 30% SOC, respectively, and for 0% SOC, the value at 55°C was . The conventional potentiostatic intermittent titration technique (PITT) and Waburg impedance approaches were also evaluated, and the advantages and disadvantages of these techniques were exposed. © 1999 The Electrochemical Society. All rights reserved.