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Mixed phase solid-state plastic crystal electrolytes based on a phosphonium cation for sodium devices

Makhlooghiazad, Faezeh, Gunzelmann, Daniel, Hilder, Matthias, MacFarlane, Douglas R., Armand, Michel, Howlett, Patrick C. and Forsyth, Maria 2017, Mixed phase solid-state plastic crystal electrolytes based on a phosphonium cation for sodium devices, Advanced energy materials, vol. 7, no. 2, pp. 1-9, doi: 10.1002/aenm.201601272.

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Title Mixed phase solid-state plastic crystal electrolytes based on a phosphonium cation for sodium devices
Author(s) Makhlooghiazad, Faezeh
Gunzelmann, Daniel
Hilder, Matthias
MacFarlane, Douglas R.
Armand, Michel
Howlett, Patrick C.ORCID iD for Howlett, Patrick C. orcid.org/0000-0002-2151-2932
Forsyth, MariaORCID iD for Forsyth, Maria orcid.org/0000-0002-4273-8105
Journal name Advanced energy materials
Volume number 7
Issue number 2
Article ID 1601272
Start page 1
End page 9
Total pages 9
Publisher Wiley-VCH
Place of publication Weinheim, Germany
Publication date 2017-01-25
ISSN 1614-6832
1614-6840
Keyword(s) Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Energy & Fuels
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Materials Science
Physics
ionic conductivity
Na batteries
organic ionic plastic crystals
phase behavior
solid-state electrolytes
Summary Na batteries are seen as a feasible alternative technology to lithium ion batteries due to the greater abundance of sodium and potentially similar electrochemical behavior. In this work, mixed phase electrolyte materials based on solid-state compositions of a trimethylisobutylphosphonium (P111i4) bis(trifluromethanesulphonyl)amide (NTf2) organic ionic plastic crystal (OIPC) and high concentration of NaNTf2 that support safe, sodium metal electrochemistry are demonstrated. A Na symmetric cell can be cycled efficiently, even in the solid state (at 50 °C and 60 °C), for a 25 mol% (P111i4NTf2)–75 mol% NaNTf2 composition at 0.1 mA cm−2 for 100 cycles. Thus, these mixed phase materials can be potentially used in Na-based devices under moderate temperature conditions. It is also investigated that the phase behavior, conductivity, and electrochemical properties of mixtures of NaNTf2 with this OIPC. It is observed that these mixtures have complex phase behavior. For high compositions of the Na salt, the materials are solid at room temperature and retain a soft solid consistency even at 50 °C with remarkably high conductivity, approaching that of the pure ionic liquid at 50 °C, i.e., 10−3–10−2 S cm−1.
Language eng
DOI 10.1002/aenm.201601272
Field of Research 091205 Functional Materials
Socio Economic Objective 850602 Energy Storage (excl. Hydrogen)
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Grant ID FL110100013
DP130101652
Copyright notice ©2016, Wiley-VCH
Persistent URL http://hdl.handle.net/10536/DRO/DU:30089188

Document type: Journal Article
Collection: Institute for Frontier Materials
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