Manganese oxide octahedral molecular sieves as insertion electrodes for rechargeable Mg batteries

Rasul, Shahid, Suzuki, Shinya, Yamaguchi, Shu and Miyayama, Masaru (2013) Manganese oxide octahedral molecular sieves as insertion electrodes for rechargeable Mg batteries. Electrochimica Acta, 110. pp. 247-252. ISSN 0013-4686

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Abstract

Magnesium has been inserted electrochemically into manganese oxide octahedral molecular sieves (OMS-5 MnO2) at room temperature. Discharge/charge profiles show that a large amount of Mg, i.e., 0.37 Mg/Mn can be inserted electrochemically using 1 M Mg(ClO4)2/AN electrolyte when OMS-5 is prepared in presence of acetylene black. X-ray diffraction analysis and discharge/charge profiles verify that a solid state solution reaction takes place upon Mg insertion into the host lattice with concurrent reduction of Mn4+ to Mn2+. However, upon each reduction of Mn by Mg insertion and resultant dissolution into electrolyte, decrease in the active compound occurs consequently. A low intrinsic electronic conductivity of OMS-5 was suggested to play a vital role in Mg insertion into the host.

Item Type:	Article
Uncontrolled Keywords:	Insertion electrodes, Mg ion batteries, Octahedral molecular sieves (OMS), Li ion batteries, Acetylene black composite
Subjects:	H600 Electronic and Electrical Engineering
Department:	Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User:	Paul Burns
Date Deposited:	02 May 2019 16:33
Last Modified:	10 Oct 2019 19:17
URI:	http://nrl.northumbria.ac.uk/id/eprint/39170

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