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


Polat B. D. , Eryilmaz O. L. , Chen Z., Keleş Ö. , Amine K.

NANO ENERGY, vol.13, pp.781-789, 2015 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 13
  • Publication Date: 2015
  • Doi Number: 10.1016/j.nanoen.2015.03.009
  • Title of Journal : NANO ENERGY
  • Page Numbers: pp.781-789

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 (-1100 mA h g (1)) with almost no capacity fade for up to 100 cycles. (C) 2015 Elsevier Ltd. All rights reserved.