Li ion conductors based on laponite/poly(ethylene oxide) composites

Doeff, M M; Reed, J S

Title: Li ion conductors based on laponite/poly(ethylene oxide) composites

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Abstract

Synthesis and characterization of single ion conducting poly(ethylene oxide) (PEO)/Li-laponite nanocomposites are reported. The amount of PEO that can be intercalated into laponite, a synthetic hectorite with high surface area, ranges from about 0.7g/g Li-laponite when the polymer average molecular weight is 1,000 or above, to about 1 g/g for oligomers of average molecular weight 500. The interlayer spacing increases from about 10 {angstrom} in the dry clay to 20--24 {angstrom} in the nanocomposites, depending upon polymer molecular weight, and the average particle size increases proportionally, but is still in the sub-micron range. AC impedance measurements on the clear, slightly brittle, self-supporting films indicate that the nanocomposite conductivity is greatly enhanced over that of the dry clay. A maximum of about 10{sup {minus}6} S/cm at 80 C is obtained for materials containing a slight excess of polymer, and conductivities of nanocomposites containing PEO were generally higher than that of those containing oxymethylene linked polyethylene glycol (amorphous PEOs). Suggestions for further improving conductivity and mechanical properties of these novel materials are presented.

Authors:: Doeff, M M; Reed, J S

Publication Date:: Sat Nov 01 00:00:00 EST 1997

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)

OSTI Identifier:: 642782

Report Number(s):: LBNL-41050; CONF-971196-
ON: DE98051543; TRN: AHC2DT02%%108

DOE Contract Number:: AC03-76SF00098

Resource Type:: Conference

Resource Relation:: Conference: Solid state ionics conference 1997, Honolulu, HI (United States), 16-21 Nov 1997; Other Information: PBD: Nov 1997

Country of Publication:: United States

Language:: English

Subject:: 25 ENERGY STORAGE; 36 MATERIALS SCIENCE; SYNTHESIS; IONIC CONDUCTIVITY; COMPOSITE MATERIALS; POLYETHYLENE GLYCOLS; CLATHRATES; MONTMORILLONITE; MECHANICAL PROPERTIES; ELECTROLYTES; ELECTRIC BATTERIES

Citation Formats


                    Doeff, M M, and Reed, J S. Li ion conductors based on laponite/poly(ethylene oxide) composites.  United States: N. p., 1997. 
        Web.

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                    Doeff, M M, & Reed, J S. Li ion conductors based on laponite/poly(ethylene oxide) composites.  United States.

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                    Doeff, M M, and Reed, J S. 1997.  
        "Li ion conductors based on laponite/poly(ethylene oxide) composites".  United States.  https://www.osti.gov/servlets/purl/642782.

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@article{osti_642782,

  title        = {Li ion conductors based on laponite/poly(ethylene oxide) composites},

  author       = {Doeff, M M and Reed, J S},

  abstractNote = {Synthesis and characterization of single ion conducting poly(ethylene oxide) (PEO)/Li-laponite nanocomposites are reported. The amount of PEO that can be intercalated into laponite, a synthetic hectorite with high surface area, ranges from about 0.7g/g Li-laponite when the polymer average molecular weight is 1,000 or above, to about 1 g/g for oligomers of average molecular weight 500. The interlayer spacing increases from about 10 {angstrom} in the dry clay to 20--24 {angstrom} in the nanocomposites, depending upon polymer molecular weight, and the average particle size increases proportionally, but is still in the sub-micron range. AC impedance measurements on the clear, slightly brittle, self-supporting films indicate that the nanocomposite conductivity is greatly enhanced over that of the dry clay. A maximum of about 10{sup {minus}6} S/cm at 80 C is obtained for materials containing a slight excess of polymer, and conductivities of nanocomposites containing PEO were generally higher than that of those containing oxymethylene linked polyethylene glycol (amorphous PEOs). Suggestions for further improving conductivity and mechanical properties of these novel materials are presented.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/642782},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Sat Nov 01 00:00:00 EST 1997},

  month        = {Sat Nov 01 00:00:00 EST 1997}

}

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