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

Shahid Rasul*, Shinya Suzuki, Shu Yamaguchi, Masaru Miyayama

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)247-252
Number of pages6
JournalElectrochimica Acta
Volume110
Early online date2 Jul 2013
DOIs
Publication statusPublished - 1 Nov 2013

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