Magnesium cobalt silicate materials for reversible magnesium ion storage

• Published in: Electrochimica acta Vol. 66; pp. 75 - 81
• Main Authors: Zheng, Yupei, NuLi, Yanna, Chen, Qiang, Wang, Ying, Yang, Jun, Wang, Jiulin
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.04.2012; Elsevier
• Subjects: Applied sciences; Batteries; Cations; Cobalt; Direct energy conversion and energy accumulation; Discharge; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Electrochemical intercalation; Exact sciences and technology; Fused salts; Magnesium; Mesoporous materials; Particle size; Rechargeable magnesium batteries; Reversibility; Silicates; Reversibility; Electrochemical intercalation; Mesoporous materials; Rechargeable magnesium batteries; Atomic emission spectrometry; Solvothermal synthesis; Insertion; Inductive coupling plasma spectrometry; Porous material; Discharge charge cycle; Surface structure; Pore size; Battery; Magnesium Silicates; Electrical characteristic; Scanning electron microscopy; Secondary cell; Lattice parameters; X ray diffraction; Discharge; Mesoporosity; Multi-element compound; Cobalt Silicates; Morphology; Preparation; Porosity; Specific capacity; Physicochemical properties
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2012.01.037

We report the formation of MgCoSiO4 materials by a high-temperature solid-state reaction, a molten salt method and a mixed solvothermal approach. The preparation process had a profound effect on the morphology and particle size of the materials. Mesoporous MgCoSiO4 was obtained for the first time by the non-surfactant mixed solvothermal approach. The electrochemical intercalation of bivalent Mg2+ cations into MgCoSiO4 as an electroactive species for rechargeable magnesium batteries was further investigated. Preliminary electrochemical data indicated that mesoporous MgCoSiO4 had a higher peak current, a larger discharge capacity and a higher flat plateau compared with the corresponding bulk materials.