Advanced structures in electrodeposited tin base negative electrodes for lithium secondary batteries

Tin anodes deposited electrochemically on a copper foil current collector are studied to develop a next-generation lithium-ion battery with higher energy density. Better cycle performance through ten initial cycles under full charge and discharge conditions was attained by annealing tin electrodepos...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 2003-07, Vol.150 (6), p.A679-A683
Main Authors: Tamura, N, Ohshita, R, Fujimoto, M, Kamino, M, Fujitani, S
Format: Article
Language:English
Online Access:Get full text
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Summary:Tin anodes deposited electrochemically on a copper foil current collector are studied to develop a next-generation lithium-ion battery with higher energy density. Better cycle performance through ten initial cycles under full charge and discharge conditions was attained by annealing tin electrodeposited on a rough surface copper foil. The annealing process was found to change the main active material from Sn to Cu6Sn5 with some minor compounds. Furthermore, a microcolumnar structure of the active material portion was found to be self-organized in accordance with the surface profile of the foil during the first charge-discharge cycle. Advantages of these structural features are discussed in terms of the initial charge and discharge performance, including specific capacity and coulombic efficiency measured by using a three-electrode cell.
ISSN:0013-4651
DOI:10.1149/1.1568108