Sb-AlC0.75-C composite anodes for high-performance sodium-ion batteries

Gyu Jin Jung, Yongho Lee, Yoo Seok Mun, Hyeongwoo Kim, Jaehyun Hur, Tae Young Kim, Kwang Suck Suh, Ji Hyeon Kim, Daeho Lee, Wonchang Choi, Il Tae Kim

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Antimony (Sb) nanoparticles dispersed in a hybrid matrix consisting of aluminum (Al) and carbon, AlC0.75-C were synthesized via one-step high-energy mechanical milling (HEMM) process and assessed as potential anode materials for use in sodium-ion batteries. The introduction of carbon during HEMM led to the formation of individual Sb nanoparticles dispersed in the AlC0.75-C matrix; in the absence of carbon during HEMM, an AlSb alloy was formed. The Sb-AlC0.75-C composite anodes demonstrated better cycling performance as well as higher rate capability compared to an AlSb anode; these improved properties could be due to the well-developed Sb phase, which acts as an electrochemically active nanocrystalline material in the AlC0.75/carbon conductive matrix. Furthermore, when fluoroethylene carbonate (FEC) was added to the electrolyte, the sodium-ion cells exhibited the best electrochemical performances, corresponding to a capacity retention of 83% at 100 cycles at 100 mA g−1 and a high rate capacity retention of 58% at 5000 mA g−1. In addition, the as-prepared Sb-AlC0.75-C composite has a high tap density; thus, its volumetric capacity was approximately three times that of carbon.

Original languageEnglish
Pages (from-to)393-400
Number of pages8
JournalJournal of Power Sources
Volume340
DOIs
Publication statusPublished - 2017 Feb 1

Keywords

  • Aluminum-antimony alloy
  • Hybrid matrix
  • Mechanical milling
  • Sodium-ion batteries

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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  • Cite this

    Jung, G. J., Lee, Y., Mun, Y. S., Kim, H., Hur, J., Kim, T. Y., Suh, K. S., Kim, J. H., Lee, D., Choi, W., & Kim, I. T. (2017). Sb-AlC0.75-C composite anodes for high-performance sodium-ion batteries. Journal of Power Sources, 340, 393-400. https://doi.org/10.1016/j.jpowsour.2016.11.086