Browse

Metal current collector-free freestanding silicon-carbon 1D nanocomposites for ultralight anodes in lithium ion batteries

Cited 49 time in Web of Science Cited 49 time in Scopus
Authors
Choi, Jang Wook; Hu, Liangbing; Cui, Lifeng; McDonough, James R.; Cui, Yi
Issue Date
2010-12
Citation
Journal of Power Sources, Vol.195 No.24, pp.8311-8316
Keywords
Current collectorLi-ion batteryNanowireNanofiber
Abstract
Although current collectors take up more weight than active materials in most lithium ion battery cells, so far research has been focused mainly on improving gravimetric capacities of active materials. To address this issue of improving gravimetric capacities based on overall cell components, we develop freestanding nanocomposites made of carbon nanofibers (CNFs) and silicon nanowires (SiNWs) as metal current collector-free anode platforms. Intrinsically large capacities of SiNWs as active materials in conjunction with the light nature of freestanding CNF films allow the nanocomposites to achieve 3-5 times improved gravimetric capacities compared to what have been reported in the literature. Moreover, three-dimensional porous structures in the CNF films facilitate increased mass loadings of SiNWs when compared to flat substrates and result in good cycle lives over 40 cycles. This type of nanocomposite cell suggests that 3D porous platforms consisting of light nanomaterials can provide for higher gravimetric and areal capacities when compared to conventional battery cells based on flat, heavy metal substrates. (c) 2010 Elsevier B.V. All rights reserved.
ISSN
0378-7753
URI
http://hdl.handle.net/10371/164584
DOI
https://doi.org/10.1016/j.jpowsour.2010.06.108
Files in This Item:
There are no files associated with this item.
Appears in Collections:
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse