Lithium manganate (LiMn 2 O 4 ) was synthesized by a very simple low-temperature solution combustion technique. The product was characterized for its phase formation and composition by X-ray diffraction and inductively coupled plasma spectroscopy. The electrochemical behavior of this material in aqueous neutral electrolyte solutions was investigated in an effort to find a means of making it a usable electrode material for rechargeable battery systems in aqueous electrolytes. Cyclic voltammetric and chronopotentiometric studies of solid LiMn 2 O 4 immobilized on a paraffin-impregnated graphite electrode were carried out in various aqueous neutral electrolyte solutions. LiMn 2 O 4 was shown to undergo reversible insertion of K +, Li +, and NH 4 + ions from neutral electrolyte solutions. Energy-dispersive X-ray (EDX) detection of electrochemically treated LiMn 2 O 4 proved the presence of the intercalated K + ion. The intercalation of the K + ion was partial, as is shown by the weight percent analysis of EDX detection results.
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Jayalakshmi et al. (2003) studied this question.
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