Nano Science and Technology InstituteNano Science and Technology Institute
Nano Science and Technology Institute 2005 NSTI Nanotechnology Conference & Trade Show
Nanotech 2005
Bio Nano 2005
Business & Investment
Nano Impact Workshop
Index of Authors
Index of Keywords
Keynote Presentations
Confirmed Speakers
Participating Companies
Industry Focus Sessions
Nanotech Expo
Special Symposia
Venue 2005
Press Room
Site Map
Nanotech 2005 At A Glance
Nanotech Proceedings
Nanotechnology Proceedings
Global Partner
nano tech
Supporting Organizations
Nanotech 2005 Supporting Organization
Media Sponsors
Nanotech 2005 Medias Sponsors
Event Contact
696 San Ramon Valley Blvd., Ste. 423
Danville, CA 94526
Ph: (925) 353-5004
Fx: (925) 886-8461

Integration of Carbon Nanotubes and Carbon Nanofibers to C-MEMS

C. Wang, R. Zaouk, L. Taherabadi, M. Madou, V. Kayastha and Y. Yap
Michigan Technological University, US

carbon nanotubes, carbon nanofibers, C-MEMS, battery

Advanced materials and novel battery designs are the two essential areas that will determine future advances in miniature batteries. In this work, we are incorporating carbon nanofibers (CNFs) and carbon nanotubes (CNTs) into carbon microelectromechanical systems (C-MEMS) to form arrays of electrodes for the formation of three-dimensional (3D) microbatteries. Our C-MEMS technique is based on the pyrolysis of patterned photoresists [1-3]. This technique is used for the formation of carbon post with high aspect ratios as shown in Figure 1 (aspect ratio >10) [3]. We have demonstrated that Li ions can be charged and discharged in these carbon posts [3]. The obtained capacity is ~220 mAh g-1, which is within the range of reversible capacities reported for coke. Upon miniaturization of the active battery material in an array of posts, an increased Li capacity is important. This is very desirable so that besides increasing power density and decreasing battery charge/discharge rates, we also can maintain a high overall battery capacity. Since it has been shown that single-walled carbon nanotubes reversibly intercalate Li up to a rate of Li2.7C6 after applying an appropriate ball-milling treatment [4], we are now combining C-MEMS structures with CNTs and CNFs. The use of CNTs and CNFs in microbatteries has not been demonstrated. Further, the issue of the contact interface between these nanomaterials and current collectors has not been addressed. We have started integrating CNFs into C-MEMS posts for achieving higher electrode surface areas and higher Li intercalation rates. As shown in Figure 2, CNFs is embedded at the surface of the C-MEMS post. Further, we have also been able to grow very high-density vertically-aligned multiwall carbon nanotubes (MWNTs) by thermal chemical vapor deposition [5]. As shown in Figure 3, these MWNTs can be patterned into arrays of microtowers. The application of these C-MEMS/CNTs and C-MEMS/CNFs electrode arrays for 3D Li ions microbatteries will be discussed in the conference.

Back to Program

Sessions Sunday Monday Tuesday Wednesday Thursday Authors

Nanotech 2005 Conference Program Abstract

Gold Sponsors
Nanotech Gold Sponsors
Silver Sponsors
Nanotech Silver Sponsors
Gold Key Sponsors
Nanotech Gold Key Sponsors
Nanotech Ventures Sponsors
Nanotech Ventures Sponsors
Nanotech Sponsors
News Headlines
NSTI Online Community

© Nano Science and Technology Institute, all rights reserved.
Terms of use | Privacy policy | Contact