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 language | English |
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Pages (from-to) | 781-789 |
Number of pages | 9 |
Journal | Nano Energy |
Volume | 13 |
DOIs | |
Publication status | Published - 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