Microwave-assisted chemical insertion

a rapid technique for screening cathodes for Mg-ion batteries

Kaveevivitchai Watchareeya, Ashfia Huq, Arumugam Manthiram

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We report an ultrafast microwave-assisted solvothermal method for chemical insertion of Mg2+ ions into host materials using magnesium acetate [Mg(CH3COO)2] as a metal-ion source and diethylene glycol (DEG) as a reducing agent. For instance, up to 3 Mg ions per formula unit of a microporous host framework Mo2.5+yVO9+z could be inserted in as little as 30 min at 170-195 °C in air. This process is superior to the traditional method which involves the use of organometallic reagents, such as di-n-butylmagnesium [(C4H9)2Mg] and magnesium bis(2,6-di-tert-butylphenoxide) [Mg-(O-2,6-But 2C6H3)2], and requires an inert atmosphere with extremely long reaction times. Considering the lack of robust electrolytes for Mg-ion batteries, this facile approach can be readily used as a rapid screening technique to identify potential Mg-ion electrode hosts without the necessity of fabricating electrodes and assembling electrochemical cells. Due to the mild reaction conditions, the overall structure and morphology of the Mg-ion inserted products are maintained and the compounds can be used successfully as a cathode in Mg-ion batteries. The combined synchrotron X-ray and neutron diffraction Rietveld analysis reveals the structure of the Mg-inserted compounds and gives an insight into the interactions between the Mg ions and the open-tunnel host framework.

Original languageEnglish
Pages (from-to)2309-2318
Number of pages10
JournalJournal of Materials Chemistry A
Volume5
Issue number5
DOIs
Publication statusPublished - 2017 Jan 1

Fingerprint

Screening
Cathodes
Microwaves
Ions
Magnesium
Rietveld analysis
Electrodes
Electrochemical cells
Reducing Agents
Reducing agents
Organometallics
Ion sources
Neutron diffraction
Glycols
Synchrotrons
Electrolytes
Metal ions
Tunnels
Acetates
X ray diffraction

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

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abstract = "We report an ultrafast microwave-assisted solvothermal method for chemical insertion of Mg2+ ions into host materials using magnesium acetate [Mg(CH3COO)2] as a metal-ion source and diethylene glycol (DEG) as a reducing agent. For instance, up to 3 Mg ions per formula unit of a microporous host framework Mo2.5+yVO9+z could be inserted in as little as 30 min at 170-195 °C in air. This process is superior to the traditional method which involves the use of organometallic reagents, such as di-n-butylmagnesium [(C4H9)2Mg] and magnesium bis(2,6-di-tert-butylphenoxide) [Mg-(O-2,6-But 2C6H3)2], and requires an inert atmosphere with extremely long reaction times. Considering the lack of robust electrolytes for Mg-ion batteries, this facile approach can be readily used as a rapid screening technique to identify potential Mg-ion electrode hosts without the necessity of fabricating electrodes and assembling electrochemical cells. Due to the mild reaction conditions, the overall structure and morphology of the Mg-ion inserted products are maintained and the compounds can be used successfully as a cathode in Mg-ion batteries. The combined synchrotron X-ray and neutron diffraction Rietveld analysis reveals the structure of the Mg-inserted compounds and gives an insight into the interactions between the Mg ions and the open-tunnel host framework.",
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Microwave-assisted chemical insertion : a rapid technique for screening cathodes for Mg-ion batteries. / Watchareeya, Kaveevivitchai; Huq, Ashfia; Manthiram, Arumugam.

In: Journal of Materials Chemistry A, Vol. 5, No. 5, 01.01.2017, p. 2309-2318.

Research output: Contribution to journalArticle

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