Magnetic effects on Li+ extraction/insertion reactions in manganese oxides λ-MnO2 were investigated with cyclic voltammetry (CV) and potential step chronoamperometry (PSCA) under magnetic field less than 30 T. The peak currents of CV were increased by magnetic fields, especially in the reduction side. Since the chemical diffusion coefficient of Li+ and the number of electrons involved in a rate-determining step were independent of magnetic fields, magnetic fields may promote the redox reaction and/or increase Li+ concentration at manganese oxide surfaces contact with a solution. The latter means Li+-insertion (adsorption).
|ジャーナル||Studies in Surface Science and Catalysis|
|出版ステータス||Published - 2001 1 1|
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