SnCo nanowire array as negative electrode for lithium-ion batteries

Ferrara, G.; DAMEN, LIBERO; ARBIZZANI, CATIA; Inguanta, R.; Piazza, S.; Sunseri, C.; MASTRAGOSTINO, MARINA

doi:10.1016/j.jpowsour.2010.09.039

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Amorphous SnCo alloy nanowires (NWs) grown inside the channels of polycarbonate membranes by potentiostatic codeposition of the two metals (SnCo-PM) were tested vs. Li by repeated galvanostatic cycles in ethylene carbonate-dimethylcarbonate - LiPF6 for their use as negative electrode in lithium ion batteries. These SnCo electrodes delivered an almost constant capacity value, near to the theoretical for an atomic ratio Li/Sn of 4.4 over more than 35 lithiation-delithiation cycles at 1C. SEM images of fresh and cycled electrodes showed that nanowires remain partially intact after repeated lithiation-delithiation cycles; indeed, several wires expanded and became porous. Results of amorphous SnCo nanowires grown inside anodic alumina membranes (SnCo-AM) are also reported. The comparison of the two types of NW electrodes demonstrates that the morphology of the SnCo-PM is more suitable than that of the SnCo-AM for electrode stability over cycling. Optimization of NW technology should thus be a promising route to enhancing the mechanical strength and durability of tin-based electrodes.

Titolo:	SnCo nanowire array as negative electrode for lithium-ion batteries
Autore/i:	G. Ferrara; DAMEN, LIBERO; ARBIZZANI, CATIA; R. Inguanta; S. Piazza; C. Sunseri; MASTRAGOSTINO, MARINA
Autore/i Unibo:	G. Ferrara DAMEN, LIBERO ARBIZZANI, CATIA R. Inguanta S. Piazza C. Sunseri MASTRAGOSTINO, MARINA mostra contributor esterni nascondi contributor esterni
Anno:	2011
Rivista:	JOURNAL OF POWER SOURCES
Digital Object Identifier (DOI):	http://dx.doi.org/10.1016/j.jpowsour.2010.09.039
Abstract:	Amorphous SnCo alloy nanowires (NWs) grown inside the channels of polycarbonate membranes by potentiostatic codeposition of the two metals (SnCo-PM) were tested vs. Li by repeated galvanostatic cycles in ethylene carbonate-dimethylcarbonate - LiPF6 for their use as negative electrode in lithium ion batteries. These SnCo electrodes delivered an almost constant capacity value, near to the theoretical for an atomic ratio Li/Sn of 4.4 over more than 35 lithiation-delithiation cycles at 1C. SEM images of fresh and cycled electrodes showed that nanowires remain partially intact after repeated lithiation-delithiation cycles; indeed, several wires expanded and became porous. Results of amorphous SnCo nanowires grown inside anodic alumina membranes (SnCo-AM) are also reported. The comparison of the two types of NW electrodes demonstrates that the morphology of the SnCo-PM is more suitable than that of the SnCo-AM for electrode stability over cycling. Optimization of NW technology should thus be a promising route to enhancing the mechanical strength and durability of tin-based electrodes.
Data prodotto definitivo in UGOV:	2013-06-12 16:10:39
Appare nelle tipologie:	1.01 Articolo in rivista

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http://hdl.handle.net/11585/91557

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