The impedance of lithium-ion batteries

Effects of protecting layer [Li,La]TiO3 on electrochemical properties of LiMn2O4 for lithium batteries

“…In general, the impedance spectra for a lithium battery test cell containing a cathode material exhibit two semicircles and a line inclined at a constant angle to the real axis. A high-frequency semicircle is involved in a passivating layer in what is known as the solid electrolyte interface, and the intermediate-frequency semicircle is related to the charge-transfer resistance in the electrode/electrolyte interface [35,36]. Fig.…”

Performance of Negative Lithium Titanate Electrodes Containing Minimized Amounts of Conducting Polymer and Modified Guar Gum as Binder

“…Equivalent circuit as proposed by Kawade et al 39 similar equivalent circuit depicted in Fig. 11 has been proposed by Dollé et al 40 A similar circuit omitting diffusion and with slightly different interpretation of the circuit elements has been used by Kulova et al 35 A more extended circuit for a full cell (see Fig. 12) with lithium and lithium titanate electrodes has been suggested by Schweikert et al 41 with the inductance of wires etc.…”

“…32,33 The difference between cell and electrode impedances had been addressed in an earlier report already, 34 for a more recent example see. 35 In that study of lithium primary cells with SO 2 and SOCl 2 as reactants at highly porous carbon positive electrodes it was suggested, that the large surface area of the positive electrodes resulted in a correspondingly small impedance which could be neglected in comparison to the impedance of the lithium electrode. The impedance of various electrodes prepared with different poythiophenes has been considered elsewhere.…”

Electroinduced Diffusion of Lithium Ions into the Structure of Magnesium Fluoride

“…Інформацію про протікання дифузійних процесів в інтеркаляційних матеріалах найчастіше отримують, застосовуючи методи потенціостатичного переривчастого титрування [7][8][9], гальваностатичного переривчастого титрування [9][10][11], спектроскопії імпедансу [12][13], циклічної вольтамперометрії (ЦВА) при малих швидкостях розгортки [14], а також класичні методи падіння потенціалу [15]. Необхідно відзначити, що навіть для електродних матеріалів однакового складу отримані коефіцієнти дифузії можуть відрізнятися на декілька порядків залежно від використаних технологій синтезу, розміру часток, електрохімічних методів дослідження [16].…”