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- W206849815 abstract "Spinel LiMn2O4 is synthesized by inverse microemulsion route and particles of size less than 200 nm are obtained. The electrochemical characterization of the sub-micron size particles of LiMn2O4 is carried out in an aqueous solution of 5 M LiNO3. In cyclic voltammetry, LiMn2O4 electrodes exhibit two pairs of reversible redox peaks and accordingly separate potential plateaus are observed during charge-discharge cycling. Electrochemical impedance data measured at various temperatures and various state-of-charge (SOC) values are analyzed to calculate exchange current, activation energy and transfer coefficient for Mn4+/Mn3+ redox process in LiMn2O4, which accompanies intercalation/deintercalation of Li+ ions. Impedance data are subjected to non-linear least squares fit procedure using an appropriate electrical equivalent circuit and charge-transfer resistance (Rct) of the redox process is evaluated. The kinetic parameters of the process are calculated from variations of Rct with temperature and SOC of LiMn2O4 electrode in 5 M LiNO3 aqueous electrolyte. A typical cell employing LiMn2O4 as the positive electrode and V2O5 as the negative electrode was assembled and characterized by charge-discharge cycling in 5 M LiNO3 aqueous electrolyte." @default.
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- W206849815 date "2008-06-01" @default.
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- W206849815 title "Electrochemical Characterization of Submicron Size Particles of LiMn2O4 in Aqueous Electrolytes" @default.
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- W206849815 doi "https://doi.org/10.1016/s1452-3981(23)15473-3" @default.
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