Lithium ion conducting gel film containing porous polymer framework and preparation method thereof

Lithium ion conducting gel film containing porous polymer framework and preparation method thereof

  • CN 1,927,921 B
  • Filed: 09/07/2006
  • Issued: 08/31/2011
  • Est. Priority Date: 09/07/2006
  • Status: Active Grant
First Claim
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1. lithium ion conducting gel film that contains porous polymer framework, it is characterized in that it has polymer-modified porous-film skeleton, in polymer-modified porous-film skeleton, fill by lithium salts, thinner, crosslinked polyethers is carried out the product that crosslinking reaction makes, polymer-modified porous-film skeleton is made up of main polymer and properties-correcting agent, be 70-90% wherein in polymer-modified porous-film skeleton total mass main polymer mass percent, the properties-correcting agent mass percent is 10-30%, main polymer is polyvinylidene difluoride (PVDF) or polyethersulfone, properties-correcting agent is two hydroxyl polypropylene glycols of relative number average molecular weight 3000-4000, the structure of polymer-modified porous-film skeleton has continuous hole path, aperture 0.2-3.0 μ

  • m, porosity 60-80%, thickness 15-25 μ

    m, crosslinked polyethers is the product of two hydroxyl polyoxyethylene glycol and di-isocyanate reaction, wherein two hydroxyl polyoxyethylene glycol mass percents of molecular weight 200-1400 are 85-90%, the vulcabond mass percent is 5-10%, and two hydroxyl polyoxyethylene glycol and vulcabond component concentration sum equal 100%.

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