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On the Mechanism of Magnesium Storage in Micro- and Nano-Particulate Tin Battery Electrodes. | LitMetric

On the Mechanism of Magnesium Storage in Micro- and Nano-Particulate Tin Battery Electrodes.

Nanomaterials (Basel)

Departamento de Química Inorgánica e Ingeniería Química, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUIQFN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071 Córdoba, Spain.

Published: July 2018

AI Article Synopsis

Article Abstract

This study reports on the electrochemical alloying-dealloying properties of Mg₂Sn intermetallic compounds. Sn Mössbauer spectra of β-Sn powder, thermally alloyed cubic-Mg₂Sn, and an intermediate MgSn nominal composition are used as references. The discharge of a Mg/micro-Sn half-cell led to significant changes in the spectra line shape, which is explained by a multiphase mechanism involving the coexistence of c-Mg₂Sn, distorted MgSn, and Mg-doped β-Sn. Capacities and capacity retention were improved by using nanoparticulate tin electrodes. This material reduces significantly the diffusion lengths for magnesium and contains surface SnO and SnO₂, which are partially electroactive. The half-cell potentials were suitable to be combined versus the MgMn₂O₄ cathodes. Energy density and cycling properties of the resulting full Mg-ion cells are also scrutinized.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6071289PMC
http://dx.doi.org/10.3390/nano8070501DOI Listing

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