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| Phase transitions in lithiated Cu2Sb anodes for lithium batteries: an in situ X-ray diffraction study |
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| Author(s): Fransson LML, Vaughey JT, Benedek R, Edstrom K, Thomas JO, Thackeray MM |
| Source: ELECTROCHEMISTRY COMMUNICATIONS Volume: 3 Issue: 7 Pages: 317-323 Published: JUL 2001 |
| Times Cited: 85 References: 19 |
| Abstract: Copper antimonide, Cu(2)sb, has been investigated as a negative electrode (anode) for rechargeable lithium batteries by in situ X-ray diffraction of Li/Cu2Sb cells. The data show that lithium is inserted into Cu2Sb with a concomitant extrusion of copper, which initiates a phase transition to a lithiated zinc-blende-type structure, LixCu2-ySb for 0<x<less than or equal to>2 and 0 less than or equal toy less than or equal to1, yielding Li2CuSb at x = 2, y = 1. Further lithiation results in the displacement of the remaining copper to yield Liz(2+z)Cu(1-z)Sb compositions (0 < z <less than or equal to> 1) with the end member Li3Sb. The Sb array remains intact in a face-centred arrangement throughout these reactions, despite a 42% expansion of the array. The reactions are reversible; they occur between 1.0 and 0 V vs. Li-0, and deliver a steady capacity of approximately 290 mAh/g after one conditioning cycle. The lithium insertion/metal extrusion reactions with the Cu2Sb structure bear a resemblance to those observed previously with Cu6Sn5 and InSb. (C) 2001 Elsevier Science B.V. All rights reserved. |
| Document Type: Article |
| Language: English |
| Reprint Address: Thackeray, MM (reprint author), Argonne Natl Lab, Div Chem Technol, 9700 S Cass Ave, Argonne, IL 60439 USA |
Addresses:
1. Argonne Natl Lab, Div Chem Technol, Argonne, IL 60439 USA
2. Uppsala Univ, Angstrom Lab, Dept Chem Mat, Uppsala, Sweden |
| Publisher: ELSEVIER SCIENCE INC, 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 USA |
| Subject Category: Electrochemistry |
| IDS Number: 445KQ |
| ISSN: 1388-2481 |
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