Method for recovering lithium hexafluorophosphate in waste lithium ion battery
A lithium-ion battery and lithium hexafluorophosphate technology, which is applied in battery recycling, recycling by waste collectors, secondary batteries, etc., can solve the problems of low recovery rate of lithium hexafluorophosphate, high recycling cost, cumbersome steps, etc., and achieve pollution prevention, less production investment, The effect of high recovery rate
Inactive Publication Date: 2016-10-12
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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The invention discloses a method for recovering lithium hexafluorophosphate in a waste lithium ion battery. The method comprises the following steps: fully discharging the waste lithium ion battery, disassembling and removing a housing and a cover plate, removing a wound core; immersing the wound core in a solvent and stirring the wound core, fully leaching lithium hexafluorophosphate in the wound core to obtain an extract of a battery solution; filtering the extract of the battery solution and centrifuging the extract, introducing centrifuge HF gas, and distilling the material to obtain lithium hexafluorophosphate. The method uses the solvent for dissolving lithium hexafluorophosphate in the positive and negative electrode plates and a diaphragm, recovery rate of lithium hexafluorophosphate is high, the production input for the method is less, lithium hexafluorophosphate with high price can be recovered by the material with low cost, material loss during a recovery process is little, considerable economic benefit is created, lithium resource waste is wasted, and pollution of lithium hexafluorophosphate and the electrolyte on environment can be prevented.
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