Synthesis and electrochemical study of Mg1.5MnO3: A defect spinel cathode for rechargeable magnesium battery
作者： Partha Saha , Prashanth H. Jampani , DaeHo Hong , Bharat Gattu , James A. Poston
DOI: 10.1016/J.MSEB.2015.08.008
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摘要: Abstract Mg1.5MnO3, a defect oxide spinel (space group: Fd3m; unit cell: 0.833294 nm) of particle size ∼100 nm derived by the Pechini route was tested as cathode for rechargeable magnesium battery. Cyclic voltammetry illustrates reversible reaction occurring in 0.3–2.0 V potential window versus magnesium. The however exhibits low capacity ∼12.4 mAh/g up to 20 cycle when cycled at current rate ∼C/27. X-ray photoelectron spectroscopy surface probe magnesiated/de-magnesiated electrodes confirms oxidation state change Mn during intercalation/de-intercalation Mg-ion from Mg1.5MnO3 electrode. electrode mainly stem kinetic limitation removal electrochemical impedance results show that charge transfer resistance, Re increases de-magnesiated state.
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