Journal
JOURNAL OF POWER SOURCES
Volume 361, Issue -, Pages 243-248Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2017.07.003
Keywords
Silicon; Titania; Electrosynthesis; Nanotubes; Silicon anode
Funding
- National Science Centre [2013/11/B/ST4/02151]
Ask authors/readers for more resources
Silicon negative electrode for lithium ion battery was designed in the form of self-organized 1D core shell nanotubes to overcome shortcomings linked to silicon volume expansion upon lithiation/delithiation typically occurring with Si nanoparticles. The negative electrode was formed on TiO2 nanotubes in two step electrochemical synthesis by means of anodizing of titanium and electrodeposition of silicon using ionic liquid electrolytes. Remarkably, it was found that the silicon grows perpendicularly to the z-axis of nanotube and therefore its thickness can be precisely controlled by the charge passed in the electrochemical protocol. Deposited silicon creates a continuous Si network on TiO2 nanotubes without grain boundaries and particle-particle interfaces, defining its electrochemical characteristics under battery testing. In the core-shell system the titania nanotube play a role of volume expansion stabilizer framework holding the nanostructured silicon upon lithiation/delithiation. The nature of Si shell and presence of titania core determine stable performance as negative electrode tested in half cell of CR2032 coin cell battery. (C) 2017 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available