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, cilt.13, ss.781-789, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 13
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1016/j.nanoen.2015.03.009
  • Dergi Adı: NANO ENERGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.781-789
  • Anahtar Kelimeler: Lithium ion batteries, Nano-columns, NiSi thin film, Oblique angle deposition, High-capacity anode, LITHIUM-ION BATTERIES, SI THIN-FILM, ELECTROCHEMICAL IMPEDANCE, COMPOSITE ANODES, COATED SILICON, LI, PERFORMANCE, NANOCOLUMNAR
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

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.