Skip to main content

Research Repository

Advanced Search

Selective NMR observation of the SEI–metal interface by dynamic nuclear polarisation from lithium metal

Hope, Michael A.; Rinkel, Bernardine L. D.; Gunnarsdóttir, Anna B.; Märker, Katharina; Menkin, Svetlana; Paul, Subhradip; Sergeyev, Ivan V.; Grey, Clare P.

Selective NMR observation of the SEI–metal interface by dynamic nuclear polarisation from lithium metal Thumbnail


Authors

Michael A. Hope

Bernardine L. D. Rinkel

Anna B. Gunnarsdóttir

Katharina Märker

Svetlana Menkin

Subhradip Paul

Ivan V. Sergeyev

Clare P. Grey



Abstract

While lithium metal represents the ultimate high-energy-density battery anode material, its use is limited by dendrite formation and associated safety risks, motivating studies of the solid–electrolyte interphase layer that forms on the lithium, which is key in controlling lithium metal deposition. Dynamic nuclear polarisation enhanced NMR can provide important structural information; however, typical exogenous dynamic nuclear polarisation experiments, in which organic radicals are added to the sample, require cryogenic sample cooling and are not selective for the interface between the metal and the solid–electrolyte interphase. Here we instead exploit the conduction electrons of lithium metal to achieve an order of magnitude hyperpolarisation at room temperature. We enhance the 7Li, 1H and 19F NMR spectra of solid–electrolyte interphase species selectively, revealing their chemical nature and spatial distribution. These experiments pave the way for more ambitious room temperature in situ dynamic nuclear polarisation studies of batteries and the selective enhancement of metal–solid interfaces in a wider range of systems.

Citation

Hope, M. A., Rinkel, B. L. D., Gunnarsdóttir, A. B., Märker, K., Menkin, S., Paul, S., …Grey, C. P. (2020). Selective NMR observation of the SEI–metal interface by dynamic nuclear polarisation from lithium metal. Nature Communications, 11(1), Article 2224. https://doi.org/10.1038/s41467-020-16114-x

Journal Article Type Article
Acceptance Date Apr 9, 2020
Online Publication Date May 6, 2020
Publication Date May 6, 2020
Deposit Date May 11, 2020
Publicly Available Date Mar 29, 2024
Journal Nature Communications
Publisher Nature Publishing Group
Peer Reviewed Peer Reviewed
Volume 11
Issue 1
Article Number 2224
DOI https://doi.org/10.1038/s41467-020-16114-x
Keywords General Physics and Astronomy; General Chemistry; Energy Materials; DNP; hyperpolarisation
Public URL https://nottingham-repository.worktribe.com/output/4395659
Publisher URL http://www.nature.com/articles/s41467-020-16114-x
Additional Information Received: 25 February 2020; Accepted: 9 April 2020; First Online: 6 May 2020; : I.V.S. is an employee of Bruker Biospin Corporation. Bruker Biospin manufactures and sells DNP instrumentation.

Files




You might also like



Downloadable Citations