Fabrication process and characterization of carbon nanotube/carbon nanocomposite for energy storage and conversion = 에너지 저장 및 변환용 탄소나노튜브/탄소 나노복합재료의 제조공정 및 특성연구

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 282
  • Download : 0
Over the past several decades, porous carbon has been recognized as a promising electrode material due to its low density, high electrical conductivity, mechanical stability, high surface area, chemical inertness, and relatively low cost. Previously, porous carbon was prepared from organic precursors, either natural or synthetic, which were carbonized and activated through a gasification process. However, these materials consisted of complex, intricate assemblies of distorted graphite-like nanocrystallites, with the consequent disadvantage that pore size uniformity and shape were typically difficult to control. An ideal electrochemical electrode requires both a large surface area for charge accumulation and an interconnected porous network with pores that are sufficiently accessible for electrolyte wetting and rapid ionic transport. Unfortunately, current commercially available activated carbon electrodes are microporous (less than 2 nm in pore diameter) and are not easily accessed by electrolyte ions. While microporous structures contribute to the charge storage capacity, mesoporous structures are more accessible to electrolytes and allow greater ion mobility. The mesoporous structure therefore allows for the delivery of a large quantity of energy at a high rate. Template-based methods have been considered the best for the synthesis of porous carbon materials with designed pore architecture and control over the pore size distribution. Activated carbon materials produced using this technique exhibit well ordered mesoporous structures with large specific volumes. However, the aggressive chemicals employed limit this approach to the production of stable graphitic carbon. Therefore, my research objective is a fabrication of highly mesoporous carbon nanofibers reinforced with carbon nanotubes and their applications for supercapacitor and Li-ion battery electrodes with high capacities. The strategy to obtain mesoporous carbon materials without using template m...
Advisors
Hong, Soon-Hyungresearcher홍순형researcher
Description
한국과학기술원 : 신소재공학과,
Publisher
한국과학기술원
Issue Date
2010
Identifier
455393/325007  / 020055878
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 신소재공학과, 2010.08, [ xvi, 140 p. ]

Keywords

Carbon nanofiber; Starch; Carbon nanotube; Energy storage; Electrochemical electrodes; 전기화학용 전극; 탄소 나노섬유; 녹말; 탄소나노튜브; 에너지 저장

URI
http://hdl.handle.net/10203/49747
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=455393&flag=dissertation
Appears in Collection
MS-Theses_Ph.D.(박사논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0