| EPSRC Reference: |
GR/M20792/01 |
| Title: |
LOW DIMENSIONAL POLYMER ELECTROLYTES WITH BLOCK COPOLYMERS |
| Principal Investigator: |
Wright, Professor PV |
| Other Investigators: |
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| Department: |
Materials Science and Engineering |
| Organisation: |
University of Sheffield |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 October 1998 |
Ends: |
31 January 2002 |
Value (£): |
141,206
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| EPSRC Research Topic Classifications: |
| Electrochemical Science & Eng. |
Materials Characterisation |
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| EPSRC Industrial Sector Classifications: |
| No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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New polymer electrolytes having laminar organisation of helical polyether-salt adducts and alkyl side chains and alk 'spacers' have high ionic conductivities(-10-'S to 10-2 S/cm in their lc and lamellar phases (60-100C).These conductivites are higher than at corresponding temperatures in conventional amorphous,solvent-free systems and hold promise of high ambient temperature conductivities. However:i) optimum conductivities between the surfaces of the film should be observed in systems in which the plane of helic growth, and of optimum ion mobility, is normal to the plane of the film (and of the electrodes)ii)Mechanical properties of the most conductive (3-component systems) are poor in the liquid crystal and micellar phases.iii)Lowering the crystal-liquid crystal transition temperatures should increase conductivities at ambient temperatur It is proposed to address these 3 issues by forming blends of the low-dimensional system and a high molar mass amphiphilic copolymer. In oriented film the copolymer should promote lamellar growth normal to the strain direction the same time improving mechanical properties by introducing bridges between adjacent lamellae. Structural irregularities within the ionophobic layers should destabilise them to lower their melting temperatures .Post-organisational photo-crosslinking and polymeric spacers will also be investigated. Mechanical properties and morphology will be studied by rheometry,SAXS and EM.Keywords describing areas of proposal.Polymer electrolytes, lithium salt complexes, liquid crystals, self-assembly
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Key Findings |
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.shef.ac.uk |