Abstract
Experiments have identified several Mg battery cathode material failure mechanisms are attributable to the ease of loss of oxygen (oxide) from the host lattice. Powder X-ray diffraction (PXRD) diffractograms of the as synthesized MoO2.8F0.2 were indexed on the basis of an orthorhombic cell. Similar cycling capacities were found for 0.2 M Mg(TFSI)2 and Mg(Triflate)2 in either PC, diglyme or dimethylformamide. The only exception noted was cells based on acetonitrile, as they showed significant cycling inefficiencies and poor cycling symptomatic of solvent stability issues. In addition to the PXRD and electrochemical studies, we utilized 25Mg MAS NMR spectroscopy on the discharged cathode samples to get a better understanding of the Mg environment in the host lattice. The results suggest no coordination changes for lattice fluorines such as formation of MgF2 upon magnetization. No intercalation of protons or solvent species was detected via 1H MAS NMR.
| Original language | English |
|---|---|
| Pages (from-to) | 17-20 |
| Number of pages | 4 |
| Journal | Chemistry of Materials |
| Volume | 28 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2016 |
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ASJC Scopus subject areas
- Materials Chemistry
- Chemical Engineering(all)
- Chemistry(all)
Cite this
Reversible Magnesium Intercalation into a Layered Oxyfluoride Cathode. / Incorvati, Jared T.; Wan, Liwen F.; Key, Baris; Zhou, Dehua; Liao, Chen; Fuoco, Lindsay; Holland, Michael; Wang, Hao; Prendergast, David; Poeppelmeier, Kenneth R.; Vaughey, John T.
In: Chemistry of Materials, Vol. 28, No. 1, 2016, p. 17-20.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Reversible Magnesium Intercalation into a Layered Oxyfluoride Cathode
AU - Incorvati, Jared T.
AU - Wan, Liwen F.
AU - Key, Baris
AU - Zhou, Dehua
AU - Liao, Chen
AU - Fuoco, Lindsay
AU - Holland, Michael
AU - Wang, Hao
AU - Prendergast, David
AU - Poeppelmeier, Kenneth R.
AU - Vaughey, John T.
PY - 2016
Y1 - 2016
N2 - Experiments have identified several Mg battery cathode material failure mechanisms are attributable to the ease of loss of oxygen (oxide) from the host lattice. Powder X-ray diffraction (PXRD) diffractograms of the as synthesized MoO2.8F0.2 were indexed on the basis of an orthorhombic cell. Similar cycling capacities were found for 0.2 M Mg(TFSI)2 and Mg(Triflate)2 in either PC, diglyme or dimethylformamide. The only exception noted was cells based on acetonitrile, as they showed significant cycling inefficiencies and poor cycling symptomatic of solvent stability issues. In addition to the PXRD and electrochemical studies, we utilized 25Mg MAS NMR spectroscopy on the discharged cathode samples to get a better understanding of the Mg environment in the host lattice. The results suggest no coordination changes for lattice fluorines such as formation of MgF2 upon magnetization. No intercalation of protons or solvent species was detected via 1H MAS NMR.
AB - Experiments have identified several Mg battery cathode material failure mechanisms are attributable to the ease of loss of oxygen (oxide) from the host lattice. Powder X-ray diffraction (PXRD) diffractograms of the as synthesized MoO2.8F0.2 were indexed on the basis of an orthorhombic cell. Similar cycling capacities were found for 0.2 M Mg(TFSI)2 and Mg(Triflate)2 in either PC, diglyme or dimethylformamide. The only exception noted was cells based on acetonitrile, as they showed significant cycling inefficiencies and poor cycling symptomatic of solvent stability issues. In addition to the PXRD and electrochemical studies, we utilized 25Mg MAS NMR spectroscopy on the discharged cathode samples to get a better understanding of the Mg environment in the host lattice. The results suggest no coordination changes for lattice fluorines such as formation of MgF2 upon magnetization. No intercalation of protons or solvent species was detected via 1H MAS NMR.
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UR - http://www.scopus.com/inward/citedby.url?scp=84954349849&partnerID=8YFLogxK
U2 - 10.1021/acs.chemmater.5b02746
DO - 10.1021/acs.chemmater.5b02746
M3 - Article
VL - 28
SP - 17
EP - 20
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 1
ER -