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    Separator-free rechargeable lithium ion cells produced by the extrusion lamination of polymer gel electrolytes

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    Publication date
    2006
    Author
    Ward, Ian M.
    Kaschmitter J,J.
    Thompson, Glen P.
    Wellings, Simon C.
    Hubbard, H.V.St.A.
    Wang, H.P.
    Keyword
    Rechargeable lithium batteries
    Polymer gels
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    Polymer gel electrolytes (PGE) based on polyvinylidene fluoride (PVDF), lithium salts and appropriate solvent systems, developed at Leeds University, have been shown to form tough rigid films with conductivities approaching 10¿2 S cm¿1. A continuous process has now been developed for the construction of rechargeable lithium cells by extruding the PGE as a melt and directly laminating between the anode and cathode electrodes. On cooling, the solid PGE acts as electrolyte and separator and binds the cell laminate together from within requiring no external case. This process has been successfully applied for the fabrication of cells with electrodes developed by SpectraPower Inc. in a commercial process enabling cell laminates with PGE thickness less than 0.1 mm and with energy densities approaching 170 Wh kg¿1. A prototype manufacturing facility has been set up to produce rechargeable cells of high specific capacity and high energy density. Future developments will enable rechargeable lithium ion cells to be produced on a continuous process as flat sheets opening the way for novel battery geometries.
    URI
    http://hdl.handle.net/10454/3332
    Version
    No full-text available in the repository
    Citation
    Ward, I.M., Hubbard, H.V.St.A., Wellings, S.C., Thompson, G.P., Kaschmitter, J. and Wang, H.P. (2006). Separator-free rechargeable lithium ion cells produced by the extrusion lamination of polymer gel electrolytes. Journal of Power Sources. Vol. 162, No. 2, pp. 818-822.
    Link to publisher’s version
    http://dx.doi.org/10.1016/j.jpowsour.2005.07.005
    Type
    Article
    Collections
    Engineering and Digital Technology Publications

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