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http://dx.doi.org/10.5229/JECST.2015.6.4.116

Lithium Diffusivity of Tin-based Film Model Electrodes for Lithium-ion Batteries  

Hong, Sukhyun (Department of Energy Science and Technology)
Jo, Hyuntak (Department of Energy Science and Technology)
Song, Seung-Wan (Department of Energy Science and Technology)
Publication Information
Journal of Electrochemical Science and Technology / v.6, no.4, 2015 , pp. 116-120 More about this Journal
Abstract
Lithium diffusivity of fluorine-free and -doped tin-nickel (Sn-Ni) film model electrodes with improved interfacial (solid electrolyte interphase (SEI)) stability has been determined, utilizing variable rate cyclic voltammetry (CV). The method for interfacial stabilization comprises fluorine-doping on the electrode together with the use of electrolyte including fluorinated ethylene carbonate (FEC) solvent and trimethyl phosphite additive. It is found that lithium diffusivity of Sn is largely dependent on the fluorine-doping on the Sn-Ni electrode and interfacial stability. Lithium diffusivity of fluorine-doped electrode is one order higher than that of fluorine-free electrode, which is ascribed to the enhanced electrical conductivity and interfacial stabilization effect.
Keywords
Lithium-ion batteries; Lithium diffusivity; Tin-nickel anode; Film model electrode; Fluorine-doping; Interfacial stability;
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