Effect of organic additives in electrolyte solutions on lithium electrode behavior

Charge–discharge behavior of Li and Li–Al anodes has been investigated by measurement of AC impedance and polarization resistance. The anodes showed lower interfacial resistance in ethylene carbonate (EC)–dimethyl carbonate (DMC)/1 M LiPF6 than that in EC–diethyl carbonate (DEC)/1 M LiPF6. The interfacial resistance between Li–Al electrode and electrolyte solution decreased with content of Al in the alloy. Further, addition of 2-methylfuran (2MeF), 2-methyltetrahydrofuran (2MeTHF), 2-methylthiophene (2MeTp) and polyethylene oxide (PEO) in the electrolyte solutions decreased the polarization resistance.