Structural and Electrochemical Properties of Micro‐ and Nano‐Crystalline CoSn Electrode Materials | Zendy

Alcántara Ricardo | Zendy; Rodríguez Inés | Zendy; Tirado José Luis | Zendy

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Structural and Electrochemical Properties of Micro‐ and Nano‐Crystalline CoSn Electrode Materials

Author(s) -

Alcántara Ricardo,

Rodríguez Inés,

Tirado José Luis

Publication year - 2008

Publication title -

chemphyschem

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.016

H-Index - 140

eISSN - 1439-7641

pISSN - 1439-4235

DOI - 10.1002/cphc.200800031

Subject(s) - nanocrystalline material , electrochemistry , amorphous solid , crystallite , materials science , nano , lithium (medication) , alloy , chemistry , metallurgy , electrode , inorganic chemistry , crystallography , nanotechnology , composite material , medicine , endocrinology

Nanocrystalline CoSn with an average crystallite size of 19 nm is obtained at 265 °C by following a one‐pot method. The structural and electrochemical properties of nano‐CoSn are compared to those of micro‐CoSn (319 nm) obtained at 500 °C. Micro‐CoSn has specific capacities below 100 mAhg −1 , but very stable cycling behavior. In contrast, nano‐CoSn exhibits reversible specific capacities of over ca. 400 mAhg −1 in the first cycles, depending on the cycling conditions. The crystalline structure of micro‐CoSn is preserved after electrochemical reaction with lithium. Nano‐CoSn becomes amorphous upon cycling and a modified 119 Sn Mössbauer spectrum corresponding to a LiCoSn nano‐alloy is observed.

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