Electrochemical behaviour of spinel LiMn_2O_4 as positive electrode in rechargeable lithium cells

摘要

The spinel, lithium intercalation compound LiMn_2O_4 is prepared and studied using the techniques of a.c. impedance and cyclic voltammetry. The impedance behaviour of the LiMn_2O_4 electrode varies as lithium ions are intercalated or de-intercalated. The reversible behaviour of lithium ions in the LiMn_2O_4 electrode is confirmed by the results of cyclic voltammetry.