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Li-ion diffusion in Li intercalated graphite C6Li and C12Li probed by mu+SR
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2017 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 19, no 29, p. 19058-19066Article in journal (Refereed) Published
Abstract [en]

In order to study a diffusive behavior of Li+ in Li intercalated graphites, we have measured muon spin relaxation (mu+SR) spectra for C6Li and C12Li synthesized with an electrochemical reaction between Li and graphite in a Li-ion battery. For both compounds, it was found that Li+ ions start to diffuse above 230 K and the diffusive behavior obeys a thermal activation process. The activation energy (E-a) for C6Li is obtained as 270(5) meV, while E-a = 170(20) meV for C12Li. Assuming a jump diffusion of Li+ in the Li layer of C6Li and C12Li, a self-diffusion coefficient D-Li at 310 K was estimated as 7.6(3) x 10(-11) (cm(2) s(-1)) in C6Li and 14.6(4) x 10(-11) (cm(2) s(-1)) in C12Li.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2017. Vol. 19, no 29, p. 19058-19066
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Chemical Sciences
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URN: urn:nbn:se:kth:diva-211734DOI: 10.1039/c7cp02047cISI: 000406334300025Scopus ID: 2-s2.0-85026412648OAI: oai:DiVA.org:kth-211734DiVA, id: diva2:1133655
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QC 20170816

Available from: 2017-08-16 Created: 2017-08-16 Last updated: 2017-08-16Bibliographically approved

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Månsson, Martin

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