Long cycle-life LiFePO sub(4)/Cu-Sn lithium ion battery using foam-type three-dimensional current collector

To improve the cycle-life performance of LiFePO sub(4)/Cu-Sn lithium ion battery, a new methodology using a foam-type three-dimensional current collector was investigated. By applying the three-dimensional nickel substrate for the negative electrode, instead of conventional copper foil, the cycle pe...

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Bibliographic Details
Published in:Journal of power sources 2010-04, Vol.195 (7), p.2077-2081
Main Authors: Yao, Masaru, Okuno, Kazuki, Iwaki, Tsutomu, Awazu, Tomoyuki, Sakai, Tetsuo
Format: Article
Language:English
Online Access:Get full text
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Summary:To improve the cycle-life performance of LiFePO sub(4)/Cu-Sn lithium ion battery, a new methodology using a foam-type three-dimensional current collector was investigated. By applying the three-dimensional nickel substrate for the negative electrode, instead of conventional copper foil, the cycle performance of the Cu-Sn electrode was improved. In addition, a heat treatment of the electrode was revealed to suppress the capacity decline drastically: the heat treated electrode showed the capacity above 400 mAh g super(-1) even after 50 cycles. A full-cell which combined the developed negative electrode and a positive electrode based on LiFePO sub(4) also showed a favorable cycle performance. Furthermore, a full-cell using aqueous slurry was prepared, and the cell exhibited an excellent cycle-life performance in which it maintained above 90% of the maximum capacity even at the 200th cycle.
ISSN:0378-7753
DOI:10.1016/j.jpowsour.2009.10.014