Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 447, Issue -, Pages 274-286Publisher
ELSEVIER
DOI: 10.1016/j.memsci.2013.07.043
Keywords
Organic-inorganic hybrid electrolyte membrane; Ionic conductivity; Solid-state NMR; Electrochemical stability
Categories
Funding
- National Science Council of Taiwan
Ask authors/readers for more resources
Organic-inorganic hybrid electrolyte membranes based on the reaction of tri-block copolymer poly (propylene glycol)-block-poly(ethylene glycol)-block-poly(propylene glycol) bis(2-aminopropyl ether), 3-isocyanatepropyltriethoxysilane and central core 2,4,6- Lrichloro-1,3,5- triazine doped with LiClO4 were synthesized by a sol-gel process to obtain a double core branched structure. The structural and dynamic properties of the materials thus obtained were systematically investigated by a variety of techniques including alternate current impedance, Fourier transform infrared spectroscopy, differential scanning calorimetry, multinuclear solid-state NMR and Li-7 diffusion coefficient measurements. A VTF (Vogel-Tamman-Fulcher)-like temperature dependence of ionic conductivity was observed for solid hybrid electrolyte membranes, implying that the diffusion of charge carriers was assisted by the segmental motions of the polymer chains. The Li-ion mobility was determined from Li-7 static NMR linewidth and diffusion coefficient measurements and correlated with their ionic conductivities. A maximum ionic conductivity of 6.2 x 10(-5) Scm(-1) was obtained at 30 degrees C for the solid hybrid electrolyte membrane with a [O]/[Li] ratio of 32. After swelled in electrolyte solvent, the plasticized hybrid membrane exhibited a maximum ionic conductivity of 7.2 x 10(-3) Scm(-1) at 30 degrees C. The good value of electrochemical stability window (similar to 5 V) makes the plasticized hybrid electrolyte membrane promising for lithium-polymer battery applications. (c) 2013 Elsevier B.V. All rights reserved.
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