3-dimensional carbon nanotube for Li-ion battery anode
- Authors
- Kang, Chiwon; Lahiri, Indranil; Baskaran, Rangasamy; Kim, Won-Gi; Sun, Yang Kook; Choi, Wonbong
- Issue Date
- Dec-2012
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Li-ion batteries; Carbon nanotubes; 3D Cu current collector; Anode materials; Amorphous Si; a-Si/MWCNTs composite
- Citation
- JOURNAL OF POWER SOURCES, v.219, pp.364 - 370
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 219
- Start Page
- 364
- End Page
- 370
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/27423
- DOI
- 10.1016/j.jpowsour.2012.07.050
- ISSN
- 0378-7753
- Abstract
- Carbon nanotubes, in different forms and architectures, have demonstrated good promise as electrode material for Li-ion batteries, owing to large surface area, shorter Li-conduction distance and high electrical conductivity. However, practical application of such Li-ion batteries demands higher volumetric capacity, which is otherwise low for most nanomaterials, used as electrodes. In order to address this urgent issue, we have developed a novel 3-dimensional (3D) anode, based on multiwall carbon nanotubes (MWCNTs), for Li-ion batteries. The unique 3D design of the electrode allowed much higher solid loading of active anode material, MWCNTs in this case and resulted in more amount of Li+ ion intake in comparison to those of conventional 2D Cu current collector. Though one such 3D anode was demonstrated to offer 50% higher capacity, compared to its 2D counterpart, its ability to deliver much higher capacity, by geometrical modification, is presented. Furthermore, deposition of amorphous Si (a-Si) layer on the 3D electrode (a-Si/MWCNTs hybrid structure) offered enhancement in electrochemical response. Correlation between electrochemical performances and structural properties of the 3D anodes highlights the possible charge transfer mechanism.
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