Electrochemical properties of Cu sub(6)Sn sub(5) alloy powders directly prepared by spray pyrolysis

Spherical shape Cu-Sn alloy powders with fine size for lithium secondary battery were directly prepared by spray pyrolysis. The mean size and geometric standard deviation of the Cu-Sn alloy powders prepared at a temperature of 1100 [deg]C were 0.8 [micro]m and 1.2, respectively. The powders prepared...

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Bibliographic Details
Published in:Journal of power sources 2009-04, Vol.189 (1), p.163-168
Main Authors: Ju, Seo Hee, Jang, Hee Chan, Kang, Yun Chan
Format: Article
Language:English
Subjects:
Alloy powders
CHEMICAL PROPERTIES
COPPER ALLOYS (40 TO 99.3 CU)
Copper base alloys
COPPER TIN ALLOYS
Current density
DENSITY
Discharge
Flow rate
Intermetallic compounds
MICA
PHASES
POWDERS
PREALLOYED POWDERS
Spray pyrolysis
Standard deviation
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Summary:Spherical shape Cu-Sn alloy powders with fine size for lithium secondary battery were directly prepared by spray pyrolysis. The mean size and geometric standard deviation of the Cu-Sn alloy powders prepared at a temperature of 1100 [deg]C were 0.8 [micro]m and 1.2, respectively. The powders prepared at a temperature of 1100 [deg]C with low flow rate of carrier gas as 5 l min[super]-1 had main XRD peaks of Cu sub(6)Sn sub(5) alloy and copper-rich Cu sub(3)Sn alloy phases. Cu and Sn components were well dispersed inside the submicron-sized alloy powders. The discharge capacities of the Cu sub(6)Sn sub(5) alloy powders prepared at a flow rate of 5 l min[super]-1 dropped from 485 to 313 mAh g[super]-1 by the 20th cycle at a current density of 0.1 C. On the other hand, the discharge capacities of the Cu-Sn alloy powder prepared at a flow rate of 20 l min[super]-1 dropped from 498 to 169 mAh g[super]-1 by the 20th cycle at a current density of 0.1 C.
ISSN:0378-7753
DOI:10.1016/j.jpowsour.2008.10.020