A method of lithium-ion battery electrolytes are recycled using supercritical carbon dioxide fluid

A method of lithium-ion battery electrolytes are recycled using supercritical carbon dioxide fluid

  • CN 108,288,738 A
  • Filed: 01/30/2018
  • Published: 07/17/2018
  • Est. Priority Date: 01/30/2018
  • Status: Active Application
First Claim
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1. a kind of method recycling lithium-ion battery electrolytes using supercritical carbon dioxide fluid, it is characterised in that:

  • The sideMethod includes the following steps:

    (1) used Li ion cell is substantially discharged, is then disassembled, remove decapsidate, anode and cathode terminals, sealing ring and cover board;

    (2) it is folder the electrolyte after dismantling, the collector with positive and negative pole material and diaphragm to be transferred to ethyl butyl ketone,3-heptanoneIn carbon dioxide supercritical extraction device with agent;

    (3) temperature, pressure, extraction time and the flow of adjustment supercritical carbon dioxide fluid carry out the extraction of organic solvent, makeSolvent in electrolyte is efficiently separated with electrolyte;

    (4) obtained solvent is subjected to rectifying, removes entrainer, and carry out constituent analysis, electrolyte is supplemented according to analysis resultSalt, organic solvent and additive adjust proportioning and electrolyte are made.

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