Journal
POLYMER INTERNATIONAL
Volume 63, Issue 2, Pages 307-314Publisher
WILEY
DOI: 10.1002/pi.4506
Keywords
poly[(vinylidene fluoride)-co-hexafluoropropylene]; composite polymer electrolyte; doped; carbon nanotubes; lithium ion batteries
Categories
Funding
- Major Provincial Science and Technology Programs of Hunan [2011FJ1005]
Ask authors/readers for more resources
Modified carbon nanotubes (m-CNTs) were successfully prepared by the interactions between nitric and sulfuric acids and CNTs, which was confirmed using Fourier transform infrared spectroscopy. Poly[(vinylidene fluoride)-co-hexafluoropropylene]-based composite polymer electrolyte (CPE) membranes doped with various amounts of m-CNTs were prepared by phase inversion method. The desired CPEs were obtained by soaking the liquid electrolytes for 30 min. The physicochemical and electrochemical properties of the CPE membranes were investigated using scanning electron microscopy, X-ray diffraction, thermogravimetry, electrochemical impedance spectroscopy and linear sweep voltammetry. The results show that the CPE membranes doped with 2.2 wt% m-CNTs possess the smoothest surface and the highest decomposition temperature about 450 degrees C. Obviously, adding an appropriate amount of m-CNTs into the polymer matrix can decrease the crystallinity and enhance the ionic conductivity; the temperature dependence of ionic conductivity follows the Arrhenius relation and the ionic conductivity at room temperature is up to 4.9 mScm(-1). The interfacial resistance can reach a stable value of about 415 cm(-2) after 10 days storage. The excellent rate and cycle performances with an electrochemical working window up to 5.4 V ensure that the CPEs doped with 2.2 wt% m-CNTs can be considered as potential candidates as polymer electrolyte for lithium ion batteries. (c) 2013 Society of Chemical Industry
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available