Octahedral magnesium manganese oxide molecular sieves as the cathode material of aqueous rechargeable magnesium-ion battery

• Published in: Electrochimica acta Vol. 229; pp. 371 - 379
• Main Authors: Zhang, Hongyu, Ye, Ke, Shao, Shuangxi, Wang, Xin, Cheng, Kui, Xiao, Xue, Wang, Guiling, Cao, Dianxue
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.03.2017; Elsevier BV
• Subjects: Absorbents; aqueous battery; Aqueous electrolytes; Batteries; cathode material; Cathodes; Discharge; Electrochemical analysis; Electrochemical impedance spectroscopy; Electrode materials; Electrolytes; Energy storage; Inductively coupled plasma; Lithium; Low cost; Magnesium; Magnesium ion; magnesium manganese oxide; Manganese; microsheet; Molecular sieves; Particle physics; Photoelectron spectroscopy; Product safety; Rechargeable batteries; Scanning electron microscopy; Spectroscopic analysis; Studies; Transmission electron microscopy; X-ray diffraction; aqueous battery; microsheet; cathode material; magnesium manganese oxide; Magnesium ion
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2017.01.110

[Display omitted] •The mico-sheet Mg-OMS-1 is synthesized by a simple hydrothermal method.•The mechanism of Mg2+ insertion/deinsertion from Mg-OMS-1 is explored.•The electrode exhibits a good electrochemical performance in MgCl2 electrolyte. Aqueous magnesium-ion batteries have shown the desired properties of high safety characteristics, similar electrochemical properties to lithium and low cost for energy storage applications. The micro-sheet morphology of todorokite-type magnesium manganese oxide molecular sieve (Mg-OMS-1) material, which applies as a novel cathode material for magnesium-ion battery, is obtained by the simple hydrothermal method. The structure and morphology of the particles are confirmed by X-ray power diffraction, X-ray photoelectron spectroscopy, inductively coupled plasma, scanning and transmission electron microscopy. The electrochemical performance of Mg-OMS-1 is researched by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and constant current charge-discharge measurement. Mg-OMS-1 shows a good battery behavior for Mg2+ insertion and deinsertion in the aqueous electrolyte. When discharging at 10mAg−1 in 0.2moldm−3 MgCl2 aqueous electrolyte, the initial discharge capacity reaches 300mAhg−1. The specific capacity retention rate is 83.7% after cycling 300 times at 100mAg−1 in 0.5moldm−3 MgCl2 electrolyte with a columbic efficiency of nearly 100%.