Li Plating on Carbon Electrode Surface Probed by Low-Field Dynamic Nuclear Polarization 7Li NMR
Keyword(s):
7Li Nmr
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Lithium deposition on graphite electrode not only reduces fast-charging capability of lithium ion batteries but also causes safety trouble. Here, a low-field 7Li dynamic nuclear polarization (DNP) is used to probe Li plating on the surfaces of three types of carbon electrodes: hard carbon, soft carbon and graphite. Owing to the strong Fermi contact interaction between 7Li and conduction electrons, the 7Li nuclear-magnetic-resonance (NMR) signal of Li metal deposited on electrode surface could be selectively enhanced by DNP. It is suggested that low-field 7Li DNP spectroscopy is a sensitive tool for investigating Li deposition on electrodes during charging/discharging processes.
2010 ◽
Vol 23
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pp. 115008
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1999 ◽
Vol 138
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pp. 313-319
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2009 ◽
Vol 37
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pp. 851-864
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2009 ◽
Vol 131
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pp. 6090-6092
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2012 ◽
Vol 43
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pp. 237-250
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1991 ◽
Vol 95
(2)
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pp. 405-409
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