Title | Lithium-7 nuclear magnetic resonance and Ti K-edge X-ray absorption spectroscopic investigation of electrochemical lithium insertion in Li4/3+xTi5/3O4 |
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Publication Type | Articolo su Rivista peer-reviewed |
Year of Publication | 2003 |
Authors | Ronci, F., Stallworth P.E., Alamgir F., Schiros T., Van Sluytman J., Guo X., Reale P., Greenbaum S., DenBoer M., and Scrosati B. |
Journal | Journal of Power Sources |
Volume | 119-121 |
Pagination | 631-636 |
ISSN | 03787753 |
Keywords | Electrochemistry, Intercalation compounds, Lattice constants, Lithium compounds, Nuclear magnetic resonance spectroscopy, Titanium, X ray diffraction analysis, X-ray absorption fine structures (XAFS) |
Abstract | The spinel compound Li4/3+xTi5/3O4 is known to undergo reversible lithium intercalation up to x=1 with almost no change in lattice parameters, hence its designation as a "zero strain" intercalation compound. Structural changes that accompany electrochemical Li intercalation into this compound were studied by both 7Li nuclear magnetic resonance (NMR) and Ti K-edge X-ray absorption fine structure (XAFS). The NMR results demonstrate that Li occupancies do not follow a simple distribution between two possible sites, one tetrahedral and one octahedral. The presence of at least one additional octahedral site is suggested. Line width measurements show that the Li+ ions do not return to their original distribution after cycling. XAFS results indicate the presence of modest static disorder in Ti-O and Ti-Ti distances above x = 0.5. Both methods thus reveal subtle structural details previously unobserved by X-ray diffraction (XRD). © 2003 Elsevier Science B.V. All rights reserved. |
Notes | cited By 16; Conference of Selected Papers Presented at the 11th IMLB ; Conference Date: 22 June 2002 Through 28 June 2002; Conference Code:61111 |
URL | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0038746684&doi=10.1016%2fS0378-7753%2803%2900191-5&partnerID=40&md5=7d13df8627c8507bc6b3809eaacefc0a |
DOI | 10.1016/S0378-7753(03)00191-5 |
Citation Key | Ronci2003631 |