期刊
JOURNAL OF ELECTROCHEMICAL SCIENCE AND TECHNOLOGY
卷 6, 期 4, 页码 116-120出版社
KOREAN ELECTROCHEMISTRY SOC
DOI: 10.5229/JECST.2015.6.4.116
关键词
Lithium-ion batteries; Lithium diffusivity; Tin-nickel anode; Film model electrode; Fluorine-doping; Interfacial stability
资金
- Korean Ministry of Science, ICT & Future Planning [2013K000214]
- Ministry of Education and National Research Foundation [2012026203]
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.
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