A novel intrinsically porous separator for self-standing lithium-ion batteries

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Abstract

γ-LiAlO2, Al2O3and MgO were used as fillers in a PVdF-HFP polymer matrix to form self-standing, intrinsically porous separators for lithium-ion batteries. These separators can be hot-laminated onto the electrodes without losing their ability to adsorb liquid electrolyte. The electrochemical stability of the separators was tested by constructing half-cells with the configuration: Li/fibre-glass/filler-based separator/electrode. MgO-based separators were found to work well with both positive and negative electrodes. An ionic conductivity of about 4×10-4S cm-1was calculated for the MgO-based separator containing 40% 1 M solution of LiPF6in an EC/DMC 1:1 solvent. Self-standing, lithium-ion cells were constructed using the MgO-based separator and the resulting battery performance evaluated in terms of cyclability, power and energy density. © 2002 Elsevier Science Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)227 - 233
Number of pages7
JournalElectrochimica Acta
Volume48
Issue number3
DOIs
Publication statusPublished - 11 Dec 2002

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All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

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