Insights into the electrochemical performances of Bi anodes for Mg ion batteries using 25Mg solid state NMR spectroscopy

Zigeng Liu; Jeongjae Lee; Guolei Xiang; Hugh F J Glass; Evan N Keyzer; Siân E Dutton; Clare P Grey

doi:10.1039/c6cc08430c

Insights into the electrochemical performances of Bi anodes for Mg ion batteries using ²⁵Mg solid state NMR spectroscopy

Chem Commun (Camb). 2017 Jan 5;53(4):743-746. doi: 10.1039/c6cc08430c.

Authors

Zigeng Liu¹, Jeongjae Lee¹, Guolei Xiang¹, Hugh F J Glass², Evan N Keyzer¹, Siân E Dutton³, Clare P Grey¹

Affiliations

¹ Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK. cpg27@cam.ac.uk.
² Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK. cpg27@cam.ac.uk and Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, UK.
³ Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, UK.

PMID: 27990525
DOI: 10.1039/c6cc08430c

Abstract

Bi nanowires as anode materials for Mg ion batteries exhibit excellent electrochemical behaviour, forming Mg₃Bi₂; this is in part ascribed to the rapid Mg mobility between the two Mg sites of Mg₃Bi₂, as revealed by the ²⁵Mg NMR spectra of Mg₃Bi₂ formed electrochemically and via ball-milling. A mechanism involving hops into vacant Mg sites is proposed.