High capacity anode with well-aligned, ordered NiSi nano-columnar arrays

B. Deniz Polat, O. Levent Eryilmaz, Zonghai Chen, Ozgul Keles*, Khalil Amine

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

In this work, well-aligned and ordered NiSi nano columnar arrays were fabricated using an ion assisted oblique angle deposition technique based on electron beam co-evaporation. It was demonstrated that these NiSi nano columnar arrays were promising high-capacity anode material for next generation lithium-ion batteries. Nano-structured Si films were also deposited and evaluated as anode material under the same experimental conditions for comparison. It was found that the dopant of about 9% wt. Ni in Si nano columns helped to improve the electrical conductivity and the electrochemical performance of the material. The electrochemical characterization showed that the well-aligned nano-columnar porous NiSi thin film delivered a very high reversible capacity (~1100mAhg-1) with almost no capacity fade for up to 100 cycles.

Original languageEnglish
Pages (from-to)781-789
Number of pages9
JournalNano Energy
Volume13
DOIs
Publication statusPublished - 1 Apr 2015

Bibliographical note

Publisher Copyright:
© 2015 Elsevier Ltd.

Keywords

  • High-capacity anode
  • Lithium ion batteries
  • Nano-columns
  • NiSi thin film
  • Oblique angle deposition

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