Electrochemical Activity of Dendrimer-Stabilized Tin Nanoparticles for Lithium Alloying Reactions

Rohit Bhandari, Rachel M. Anderson, Shannon Stauffer, Anthony G. Dylla, Graeme Henkelman, Keith J. Stevenson, Richard M. Crooks

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

The synthesis and characterization of Sn nanoparticles in organic solvents using sixth-generation dendrimers modified on their periphery with hydrophobic groups as stabilizers are reported. Sn2+:dendrimer ratios of 147 and 225 were employed for the synthesis, corresponding to formation of Sn147 and Sn225 dendrimer-stabilized nanoparticles (DSNs). Transmission electron microscopy analysis indicated the presence of ultrasmall Sn nanoparticles having an average size of 3.0-5.0 nm. X-ray absorption spectroscopy suggested the presence of Sn nanoparticles with only partially oxidized surfaces. Cyclic voltammetry studies of the Sn DSNs for Li alloying/dealloying reactions demonstrated good reversibility. Control experiments carried out in the absence of DSNs clearly indicated that these ultrasmall Sn DSNs react directly with Li to form SnLi alloys.

Original languageEnglish
Pages (from-to)6570-6576
Number of pages7
JournalLangmuir
Volume31
Issue number23
DOIs
Publication statusPublished - 16 Jun 2015
Externally publishedYes

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