Sulfur assited-carbon nanotubes growth as binder free electrodes for Lithium-ion battery anodes
- Paper number
IAC-11,C3,3,6,x9464
- Author
Ms. Dionne M. Hernandez-Lugo, NASA Harriet Jenkins Pre-Doctoral Program, University of Puerto Rico, San Juan, PR, USA, Puerto Rico
- Coauthor
Mr. Frank Mendoza, University of Puerto Rico, Puerto Rico
- Coauthor
Mr. Emmanuel Febus, University of Puerto Rico, Puerto Rico
- Coauthor
Dr. Gerardo Morell, University of Puerto Rico, Puerto Rico
- Coauthor
Dr. Brad Weiner, University of Puerto Rico, Puerto Rico
- Year
2011
- Abstract
Initial research on Li-based rechargeable battery materials was driven by the consumer electronics industry and continual research and design inventions are required to cope with the ever-demanding miniaturization and portability. Consumers and NASA are in constant demand for thinner, lighter, space-effective and shape, flexible batteries with a larger autonomy. Commercial Li ion batteries mostly use graphite as the anode material because of its excellent stability. However, because the theoretical specific capacity of graphite is low (372 mAh g), sample opportunity exists for the development of new anode materials with higher capacities. The introduction of nanomaterials as electrodes in the cells, in place of conventional electrodes, was intended to provide higher lithiation capability and an overall better performance simply because of the nanomaterials extremely high surface area as compared to their bulk counterparts. Out of the many nanomaterials available, carbon nanotubes (CNTs) attracted much attention, mainly because of their excellent conductivity properties. Carbon nanotubes (CNTs) are predicted to reinforce novel composite materials because of their structural perfection, excellent mechanical properties and low density. Commercial batteries and most of the research efforts have used polymeric binders in the anodes, adding a redundant weight, ultimately reducing the specific capacity of the electrode. Advanced Li ion batteries, hence, need a binder-free electrode, to avoid such a type of capacity loss and which will include additional safety features. For this carbon nanotubes grown directly on a copper substrate need to be obtained. As part of this work carbon nanotubes grown on a copper substrate will be presented. They have been grown by using Sulfur assisted Hot Filament Chemical Vapor Deposition. This new electrode will serve as an active material for lithium-ion battery anode and also as a matrix for other intercalation materials. Structural characterization such as X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), and some electrochemical evaluation (cyclic voltammetry, charge discharge studies) on this electrode using CR 2032 coin cells will be presented.
- Abstract document
- Manuscript document
(absent)