Microsized Sn as Advanced Anodes in Glyme-Based Electrolyte for Na-Ion Batteries

Biao Zhang, Gwena�lle Rousse, Dominique Foix, Romain Dugas, Daniel Alves Dalla Corte, Jean Marie Tarascon

Research output: Journal article publicationJournal articleAcademic researchpeer-review

112 Citations (Scopus)

Abstract

An experiment was conducted to demonstrate that glyme-based electrolytes enable high reversible capacity of Sn anode for Na-ion batteries. The improvement in the stability mainly relies on the formation of protecting films which prevent the formation of insulating domains of active materials. Moreover, the Na-Sn phases during electrochemical alloying are examined through in situ XRD characterization to clarify several intermediate phases such as amorphous NaSn. In particular, a new polymorph of Na9Sn4is found and its crystal structure is analyzed by synchrotron X-ray diffraction. Finally, prototype full cells using Sn anode and NVP cathode are assembled. They demonstrate the great advantages of using Sn instead of hard carbon as anodes since enhancements of 19% and 61% increase in gravimetric and volumetric energy densities, respectively, can be achieved.
Original languageEnglish
Pages (from-to)9824-9830
Number of pages7
JournalAdvanced Materials
Volume28
Issue number44
DOIs
Publication statusPublished - 1 Jan 2016
Externally publishedYes

Keywords

  • electrolytes
  • microsized tin
  • Na ion batteries

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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