Structure and conductive properties of poly(ethylene oxide)/layered double hydroxide nanocomposite polymer electrolytes
- 30 October 2004
- journal article
- Published by Elsevier BV in Electrochimica Acta
- Vol. 49 (27), 4993-4998
- https://doi.org/10.1016/j.electacta.2004.06.018
Abstract
The oligo(ethylene oxide) modified layered double hydroxide (LDH) prepared by template method was added as a nanoscale nucleating agent into poly(ethylene oxide) (PEO) to form PEO/OLDH nanocomposite electrolytes. The effects of OLDH addition on morphology and conductivities of nanocomposite electrolytes were studied using wide-angle X-ray diffractometer, polarized optical microscopy, differential scanning calorimetry and ionic conductivity measurement. The results show that the exfoliated morphology of nanocomposites is formed due to the surface modification of LDH layers with PEO matrix compatible oligo(ethylene oxide)s. The nanoscale dispersed OLDH layers inhibit the crystal growth of PEO crystallites and result in a plenty amount of intercrystalline grain boundary within PEO/OLDH nanocomposites. The ionic conductivities of nanocomposite electrolytes are enhanced by three orders of magnitude compared to the pure PEO polymer electrolytes at ambient temperature. It can be attributed to the ease transport of Li+ along intercrystalline amorphous phase. This novel nanocomposite electrolytes system with high conductivities will be benefited to fabricate the thin-film type of Li-polymer secondary battery.Keywords
This publication has 27 references indexed in Scilit:
- New Polymer−Inorganic Nanocomposites: PEO−ZnO and PEO−ZnO−LiClO4 FilmsThe Journal of Physical Chemistry B, 2001
- Role of the ceramic fillers in enhancing the transport properties of composite polymer electrolytesElectrochimica Acta, 2001
- Structural evolution and conductivity of PEO:LiBF4–MgO composite electrolytesElectrochimica Acta, 2001
- Polymer-layered silicate nanocomposites: preparation, properties and uses of a new class of materialsMaterials Science and Engineering: R: Reports, 2000
- Polymer Electrolytes: The Key to Lithium Polymer BatteriesMRS Bulletin, 2000
- Physical and Chemical Properties of Nanocomposite Polymer ElectrolytesThe Journal of Physical Chemistry B, 1999
- Effects of nanoscale SiO2 on the thermal and transport properties of solvent-free, poly(ethylene oxide) (PEO)-based polymer electrolytesSolid State Ionics, 1999
- Nanocomposite polymer electrolytes for lithium batteriesNature, 1998
- Polymer‐salt intercalation complexes in layer silicatesAdvanced Materials, 1990
- Complexes of alkali metal ions with poly(ethylene oxide)Polymer, 1973