Assessment of influence of finely dispersed carbon nanotubes in polymer electrolytes for lithium batteries

Author

Lee, Kwang-Pill ; Gopalan, Anantha Iyengar ; Manian, Kalayil Manian Pillai ; Santhosh, Padmanabhan ; Soo, Kim Kyu

Author_Institution

Department of Chemistry Graduate School, Kyungpook National University, Daegu 702-701, South Korea; Nano Practical Application Center, Daegu 704-230, South Korea

Volume

1

fYear

2006

fDate

17-20 June 2006

Firstpage

284

Lastpage

287

Abstract

Electrospun membranes of poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP)/multi-walled carbon nanotubes (MWCNTs) composite are prepared and loaded with lithium salts. Field emission electron microscopy provides evidence for the uniform distribution of MWCNTs into the polymer matrix. Interconnected morphology for the composite provides path for lithium ion conduction. Results from electrochemical impedance spectroscopy inform that the presence of MWCNTs in PVdF-HFP matrix improves interfacial stability between lithium electrode and membrane and augment conduction path. Equivalent circuits are generated based on impedance analysis to reveal the contribution of MWCNTs toward conductivity. A prototype cell is fabricated. The electrospun PVdF-HFP/MWCNT (2%) shows an ionic conductivity of about 5.85 mS/cm at 25°C and a high anodic stability.

Keywords

Batteries; carbon compounds; energy storage; impedance measurements; nanotechnology; Batteries; Biomembranes; Carbon nanotubes; Circuit stability; Conductivity; Electron emission; Electron microscopy; Integrated circuit interconnections; Lithium; Polymers; Batteries; carbon compounds; energy storage; impedance measurements; nanotechnology;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanotechnology, 2006. IEEE-NANO 2006. Sixth IEEE Conference on

Print_ISBN

1-4244-0077-5

Type

conf

DOI

10.1109/NANO.2006.247630

Filename

1717080