Synthesis and characterization of empty silicon clathrates for anode applications in Li-ion batteries

Kwai S. Chan, Michael A. Miller, Carol Ellis-Terrell, Candace Chan

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Several processing methods were developed and evaluated for synthesizing empty silicon clathrates. A solution synthesis method based on the Hofmann-elimination oxidation reaction was successfully utilized to produce 20 mg of empty Si46. Half-cells using the Si46 electrodes were successfully cycled for 1000 cycles at rate of 5.3C. The capacity of the Si46 electrode in long-term tests was 675 mAh/g at the 4th cycle, but increased to 809 mAh/g at 50 cycles. The corresponding Coulombic efficiency was better than 99%. The capacity dropped from 809 to 553 mAh/g after 1000 cycles while maintaining a 99% Coulombic efficiency. In comparison, a Ba8Al8Si38 electrode could be cycled for about 200 cycles with a lower capacity and Coulombic efficiency. Potential applications of empty silicon clathrates as anode materials in Li-ion batteries are discussed.

Original languageEnglish
Pages (from-to)3043-3048
Number of pages6
JournalMRS Advances
Volume1
Issue number45
DOIs
Publication statusPublished - Jan 1 2016

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clathrates
Silicon
electric batteries
Anodes
anodes
cycles
Electrodes
silicon
synthesis
ions
electrodes
Oxidation
Processing
elimination
Lithium-ion batteries
oxidation
cells

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Synthesis and characterization of empty silicon clathrates for anode applications in Li-ion batteries. / Chan, Kwai S.; Miller, Michael A.; Ellis-Terrell, Carol; Chan, Candace.

In: MRS Advances, Vol. 1, No. 45, 01.01.2016, p. 3043-3048.

Research output: Contribution to journalArticle

Chan, Kwai S. ; Miller, Michael A. ; Ellis-Terrell, Carol ; Chan, Candace. / Synthesis and characterization of empty silicon clathrates for anode applications in Li-ion batteries. In: MRS Advances. 2016 ; Vol. 1, No. 45. pp. 3043-3048.
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