Ionic liquid electrolyte for lithium metal batteries : physical, electrochemical, and interfacial studies of N-Methyl-N-butylmorpholinium Bis(fluorosulfonyl)imide

Lane, George H., Bayley, Paul M., Clare, Bronya R., Best, Adam S., MacFarlane, Douglas R., Forsyth, Maria and Hollenkamp, Anthony F. 2010, Ionic liquid electrolyte for lithium metal batteries : physical, electrochemical, and interfacial studies of N-Methyl-N-butylmorpholinium Bis(fluorosulfonyl)imide, Journal of physical chemistry part c : nanomaterials and interfaces, vol. 114, no. 49, pp. 21775-21785.

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Title Ionic liquid electrolyte for lithium metal batteries : physical, electrochemical, and interfacial studies of N-Methyl-N-butylmorpholinium Bis(fluorosulfonyl)imide
Formatted title Ionic liquid electrolyte for lithium metal batteries : physical, electrochemical, and interfacial studies of N-Methyl-N-butylmorpholinium Bis(fluorosulfonyl)imide
Author(s) Lane, George H.
Bayley, Paul M.
Clare, Bronya R.
Best, Adam S.
MacFarlane, Douglas R.
Forsyth, Maria
Hollenkamp, Anthony F.
Journal name Journal of physical chemistry part c : nanomaterials and interfaces
Volume number 114
Issue number 49
Start page 21775
End page 21785
Publisher American Chemical Society
Place of publication Washington, D.C.
Publication date 2010
ISSN 1932-7447
1932-7455
Summary The ionic liquid (IL) N-methyl-N-butylmorpholinium bis(fluorosulfonyl)imide (C4mmor FSI) is examined from physical and electrochemical perspectives. Pulsed field gradient NMR spectroscopy shows that ion diffusivities are low compared with similar, non-ethereal ILs. Ionicity values indicate that above room temperature, less than 50% of ions contribute to conductivity.

Lithium cycling in symmetrical cells using a C4mmor FSI-based electrolyte is best demonstrated at elevated temperatures. Specific capacities of 130 mAh g−1 are achieved in a Li−LiFePO4 battery at 85 °C. FT-IR spectroscopic investigations of lithium electrodes suggest the presence of alkoxide species in the solid electrolyte interphase (SEI), implying a ring-opening reaction of C4mmor with lithium metal. In contrast, the SEI derived from N-methyl-N-propylpiperidinium FSI lacks the alkoxide signature but shows signs of alkyl unsaturation, and the activation energy for Li+ transport through this SEI is slightly lower than that for the C4mmor-derived SEI. Our detailed findings give insight into the capabilities and limitations of rechargeable lithium metal batteries utilizing a C4mmor FSI electrolyte.
Language eng
Field of Research 039999 Chemical Sciences not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2010 American Chemical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30039934

Document type: Journal Article
Collection: Institute for Technology Research and Innovation
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