Synthesis of tin nanocrystals in room temperature ionic liquids

Abstract : The aim of this work was to investigate the synthesis of tin nanoparticles (NPs) or tin/carbon composites, in room temperature ionic liquids (RTILs), that could be used as structured anode materials for Li-ion batteries. An innovative route for the synthesis of Sn nanoparticles in such media is successfully developed. Compositions, structures, sizes and morphologies of NPs were characterized by high-energy X-ray diffraction (HEXRD), X-ray photoelectron spectroscopy (XPS) and high-resolution transmission electron microscopy (HRTEM). Our findings indicated that (i) metallic tetragonal β-Sn was obtained and (ii) the particle size could be tailored by tuning the nature of the RTILs, leading to nano-sized spherical particles with a diameter ranging from 3 to 10 nm depending on synthesis conditions. In order to investigate carbon composite materials for Li-ion batteries, Sn nanoparticles were successfully deposited on the surface of multi-wall carbon nanotubes (MWCNT). Moreover, electrochemical properties have been studied in relation to a structural study of the nanocomposites. The poor electrochemical performances as a negative electrode in Li-ion batteries is due to a significant amount of RTIL trapped within the pores of the nanotubes as revealed by XPS investigations. This dramatically affected the gravimetric capacity of the composites and limited the diffusion of lithium. The findings of this work however offer valuable insights into the exciting possibilities for synthesis of novel nano-sized particles and/or alloys (e.g. Sn-Cu, Sn-Co, Sn-Ni, etc.) and the importance of carbon morphology in metal pulverization during the alloying/dealloying process as well as prevention of ionic liquid trapping.
Document type :
Journal articles
Complete list of metadatas

Cited literature [39 references]  Display  Hide  Download

https://hal.sorbonne-universite.fr/hal-01102801
Contributor : Administrateur Hal-Upmc <>
Submitted on : Tuesday, January 13, 2015 - 3:18:22 PM
Last modification on : Thursday, July 4, 2019 - 11:00:07 AM
Long-term archiving on: Tuesday, April 14, 2015 - 11:06:54 AM

File

Le_Vot_2014_Synthesis_of_tin.p...
Files produced by the author(s)

Identifiers

Citation

Steven Le Vot, Damien Dambournet, Henri Groult, Anh-Tu Ngo, Christophe Petit, et al.. Synthesis of tin nanocrystals in room temperature ionic liquids. Dalton Transactions, Royal Society of Chemistry, 2014, 43, pp.18025-18034. ⟨10.1039/C4DT02289K⟩. ⟨hal-01102801⟩

Share

Metrics

Record views

484

Files downloads

1532