Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6614726 | Electrochimica Acta | 2013 | 5 Pages |
Abstract
The electrochemistry of Sn-Cu-C nanocomposite anode materials in Na-ion cells is described and compared directly to similar compositions from previous work in Li-ion cells. A series of compositions corresponding to (Cu6Sn5)1âxCx (x = 0.15-0.52) was prepared by combinatorial sputtering. This composition range has been shown previously to have good cycling performance in Li-ion cells, having stable capacities near 600 mAh/g for 0.15 < x < 0.45. In contrast, the same composition range was found to have reduced capacity when used in Na-ion cells, having just 350 mAh/g when x = 0.15. Further addition of carbon results in a reduction of reversible capacity to just 135 mAh/g when x = 0.44, however this alloy retains 99% of its 10th cycle capacity of 117 mAh/g after 50 cycles. The potential use and the impact of the addition of carbon to alloy negative electrodes containing Sn for Na-ion batteries are discussed.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
J.S. Thorne, R.A. Dunlap, M.N. Obrovac,