Electrode for ionic-liquid batteries

méthode de préparation d'une électrode pour batterie à base de liquide ionique

Method for preparing an electrode with high load per unit of mass filled with electrolyte for a battery with high energy density

The present invention relates to a method for preparing batteries with high energy density. more particularly, it relates to an improved method for preparing an electrode with high load per unit of mass for a metal-ion battery with high energy density. This method involves preparing an electrolyte-filled solid electrode by mixing a salt, a solvent, a binder and an active material in order to produce a mechanically stable paste.

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Process for manufacturing and use of a gel polymer electrolyte

Illustration processus de fabrication d’un électrolyte polymère gélifié

The invention relates to a process for manufacturing a gelled polymer electrolyte (GPE), comprising the steps of:

  1. solubilizing a polymer in a solvent, leading to the formation of a first homogeneous solution;
  2. mixing said solution with an electrolyte consisting of aluminum chloride with a predetermined weight ratio of electrolyte to polymer;
  3. mixing said mixture until a second homogeneous solution is obtained;- pouring said second homogeneous solution onto a substrate;
  4. removing/evaporating the solvent to obtain a homogeneous GPE membrane: polymer;- mixing said mixture until a second homogeneous solution is obtained;
  5. pouring said second homogeneous solution onto a substrate;
  6. removing/evaporating the solvent to obtain a homogeneous, mechanically stable GPE membrane;
  7. activating the polymer membrane, to further etch/deposit aluminum on the GPE membrane.
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Liquid compositions based on ionic liquids for the protection of lithium metal parts

Compositions liquides à base de liquides ioniques pour la protection de pièces en lithium métal, méthodes de revêtement et de polymérisation associées et système de stockage électrochimique

An ionic liquid-based composition for protecting lithium metal anodes in a lithium-based electrochemical energy storage systeme, comprising a polymerizable ionic liquid (or ionic liquid monomer), the cation or the anion of which carries at least one polymerizable function, a non-polymerizable ionic liquid, an ionic liquid of the “crosslinker” type, the citation or the anion of which carries at least two polymerizable functions, and a lithium salt.

The ionic liquid-based polymer composition coated as such on the lithium surface, even if it is swelling with liquid electrolyte, protects the lithium against a constant electrolyte consumption and formation of unstable solid-electrolyte interphase (SEI), which is continuously forming on a bare lithium surface. The growing of dendrites is retarded with such ionic liquid-based polumer composition protection.

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