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| LixCu6Sn5 (0 < x < 13): An intermetallic insertion electrode for rechargeable lithium batteries |
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| Author(s): Kepler KD, Vaughey JT, Thackeray MM |
| Source: ELECTROCHEMICAL AND SOLID STATE LETTERS Volume: 2 Issue: 7 Pages: 307-309 Published: JUL 1999 |
| Times Cited: 227 References: 16 |
| Abstract: It has been discovered that lithium can be inserted into the intermetallic compound Cu6Sn5 in a two-phase reaction to yield the product LixCu6Sn5 (x approximate to 13). This finding has important implications for designing new intermetallic insertion electrodes (anodes) for rechargeable lithium batteries. The theoretical capacity of LixCu(6)Sn(5) derived from the eta-phase, eta-Cu6Sn5, with a NiAs-type structure is 358 mAh/g for x(max) = 13, which corresponds to a fully lithiated composition Li2.17CuSn0.83; this capacity is close to the theoretical capacity of lithiated graphite LiC6 (372 mAh/g). The reaction occurs at approximately 0.4 V vs. lithium metal. The best cycling efficiency is obtained when the end voltage is restricted to 200 mV above the potential of lithium metal. A mechanism is proposed for the insertion of lithium into eta-Cu6Sn5. (C) 1999 The Electrochemical Society. S1099-0062(99)01-079-4. All rights reserved. |
| Document Type: Article |
| Language: English |
| Reprint Address: Kepler, KD (reprint author), Argonne Natl Lab, Electrochem Technol Program, Div Chem Technol, Argonne, IL 60439 USA |
Addresses:
1. Argonne Natl Lab, Electrochem Technol Program, Div Chem Technol, Argonne, IL 60439 USA |
| Publisher: ELECTROCHEMICAL SOC INC, 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA |
| Subject Category: Electrochemistry; Materials Science, Multidisciplinary |
| IDS Number: 195YA |
| ISSN: 1099-0062 |
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