6533b7dbfe1ef96bd126f7b2

RESEARCH PRODUCT

SnCo nanowire array as negative electrode for lithium-ion batteries

Carmelo SunseriRosalinda InguantaLibero DamenSalvatore PiazzaGermano FerraraCatia ArbizzaniMarina Mastragostino

subject

Materials scienceTIN-COBALT ALLOYRenewable Energy Sustainability and the EnvironmentMetallurgyNanowireEnergy Engineering and Power Technologychemistry.chemical_elementTin Tin–cobalt alloy Nanowire Anode Lithium-ion batteryLithium batteryLithium-ion batteryAmorphous solidAnodeSettore ING-IND/23 - Chimica Fisica ApplicataChemical engineeringchemistryTINElectrodeLithiumElectrical and Electronic EngineeringPhysical and Theoretical ChemistryTinANODELITHIUM ION BATTERY.NANOWIRE

description

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 – LiPF 6 for 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 1 C. 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.

yearjournalcountryeditionlanguage
2011-02-01
10.1016/j.jpowsour.2010.09.039http://hdl.handle.net/11585/91557