Lithium Ion Battery Anodes Produced from Densified, Silicon Coated, Carbon Nanotube Arrays.

Content Provider	Semantic Scholar
Author	Tang, Can
Copyright Year	2012
Abstract	TANG, CAN. Lithium Ion Battery Anodes Produced from Densified, Silicon Coated, Carbon Nanotube Arrays. (Under the direction of Dr. Philip Bradford.) The increasing demand in energy storage for portable devices and electric vehicles requires the further development of lithium ion batteries. In this study, lithium ion battery anodes were produced from densified, silicon coated, carbon nanotube arrays. One of the goals of this study was to uniformly coat silicon onto individual carbon nanotubes. Carbon nanotube arrays were used to compensate for the volume expansion of silicon while providing the anode with sufficient electrical conductivity. A chemical vapor deposition system was built to synthesize carbon nanotube arrays and deposit the silicon coating. Baseline anodes of carbon nanotube arrays and silicon coated carbon nanotube array anodes were assembled and tested in coin cells without binder or a current collector metal foil. SEM, TEM, XRD and Raman spectroscopy confirmed relatively uniform crystalline silicon nano-particles were coated throughout the carbon nanotube arrays. The results showed that carbon nanotube array anodes with silicon coating had improved capacity as well as coulombic efficiency. Silicon coated post-treated carbon nanotube array anodes showed improved cycling performance with about twice capacity retention compared to the composite anodes produce with as-grown, pristine carbon nanotube arrays. After composite structure optimization, composite carbon nanotube array (chlorine+30%Si+carbon) anodes exhibited a charge capacity of 1360mAh/g for the first cycle with about 73% capacity retention on the 20 cycle. Lithium Ion Battery Anodes Produced from Densified, Silicon Coated, Carbon Nanotube Arrays by Can Tang A thesis submitted to the Graduate Faculty of North Carolina State University in partial fulfillment of the requirements for the Degree of Master of Science Textile Engineering Raleigh, North Carolina 2012
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://repository.lib.ncsu.edu/bitstream/handle/1840.16/7646/etd.pdf?isAllowed=y&sequence=2
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article