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Method for treating lithium iron phosphate cathode material of waste and old power lithium battery of automobile

A technology for lithium iron phosphate and cathode material, which is applied in the field of processing waste lithium iron phosphate cathode materials for automotive power lithium batteries, can solve the problems of unfavorable industrial operation, large environmental pollution and high cost, and achieves high economic and social benefits, and is environmentally friendly. , the effect of low cost

Active Publication Date: 2013-03-06
GEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method of extracting and separating these impurities using P204 has high cost and great environmental pollution, which is not conducive to industrial operation.

Method used

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  • Method for treating lithium iron phosphate cathode material of waste and old power lithium battery of automobile

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for processing waste automobile power lithium battery lithium iron phosphate cathode material, comprising the following steps:

[0026] (1) Roasting: take the lithium iron phosphate cathode material and roast it at 600°C for 4 hours;

[0027] (2) Acid leaching: Put the roasted product into the acid solution according to the solid-to-liquid ratio of 1:4 for leaching, adjust the pH value of the acid solution to 0.5, and the acid leaching temperature at 60°C, filter and separate the solid and liquid, and collect the acid leaching filter residue and acid leaching filtrate;

[0028] (3) Alkali leaching: Take the acid leaching filter residue, put it into the lye for leaching for 2 hours according to the solid-liquid ratio of 1:2, adjust the pH value of the lye to 12, and the alkali leaching temperature to 80°C, filter and separate the solid and liquid, and collect them separately Alkali leaching filter residue and alkali leaching filtrate;

[0029] (4) Lithium reco...

Embodiment 2

[0032] A method for processing waste automobile power lithium battery lithium iron phosphate cathode material, comprising the following steps:

[0033] (1) Roasting: take the lithium iron phosphate positive electrode material and roast it at 900°C for 2 hours;

[0034] (2) Acid leaching: put the roasted product into the acid solution for leaching according to the solid-liquid ratio of 1:8, adjust the pH value of the acid solution to 2.0, and the acid leaching temperature is 95°C, filter and separate the solid and liquid, and collect the acid leaching filter residue and acid leaching filtrate;

[0035] (3) Alkali leaching: Take the acid leaching filter residue, put it into the lye for leaching for 5 hours according to the solid-liquid ratio of 1:4, adjust the pH value of the lye to 14, and the alkali leaching temperature to 100°C, filter and separate the solid and liquid, and collect them separately Alkali leaching filter residue and alkali leaching filtrate;

[0036] (4) Lit...

Embodiment 3

[0039] A method for processing waste automobile power lithium battery lithium iron phosphate cathode material, comprising the following steps:

[0040] (1) Roasting: take the lithium iron phosphate positive electrode material and roast it at 750°C for 3 hours;

[0041] (2) Acid leaching: Put the roasted product into the acid solution according to the solid-liquid ratio of 1:6 for leaching, adjust the pH value of the acid solution to 1.0, and the acid leaching temperature is 85°C, filter and separate the solid and liquid, and collect the acid leaching filter residue and acid leaching filtrate;

[0042] (3) Alkali leaching: Take the acid leaching filter residue, put it into the lye for leaching for 4 hours according to the solid-liquid ratio of 1:3, adjust the pH value of the lye to 13, and the alkali leaching temperature to 90°C, filter and separate the solid and liquid, and collect them separately Alkali leaching filter residue and alkali leaching filtrate;

[0043](4) Lithi...

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Abstract

The invention provides a method for treating a lithium iron phosphate cathode material of a waste and old power lithium battery of an automobile. The method comprises the following steps of calcination, acid leaching, alkaline leaching, and recovery and recycle of valuable metals. The method avoids the interference of iron, copper and aluminum impurities in a lithium iron phosphate cathode material on lithium recovery thereby realizing production of a pure lithium phosphate product. The method realizes the greatest degree of integrated utilization of a lithium iron phosphate cathode material, is reasonable, is realized easily, has a low cost, is environmentally friendly, is suitable for industrialization, and has high economic benefits and social benefits.

Description

technical field [0001] The invention relates to a method for recovering resources from waste industrial products, in particular to a method for processing the lithium iron phosphate cathode material of waste automobile power lithium batteries. Background technique [0002] As new energy vehicles have gradually gained attention, promotion and become an inevitable trend to replace traditional vehicles in the past few years, the output of power lithium batteries, which are the "heart" of new energy vehicles, has also entered a period of rapid growth. It is estimated that by 2012, the annual output of new energy vehicles will reach 1 million, which will drive the demand for 52,000 tons of lithium battery cathode materials. Considering the limited life of lithium batteries, these new energy vehicle lithium batteries will gradually enter the phase-out period after a few years. If the lithium in the positive electrode material is discarded at will, it will cause a great waste of re...

Claims

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Application Information

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IPC IPC(8): H01M10/54
CPCY02E60/12Y02W30/84
Inventor 王勤杨柳陈艳红伍金平罗亮亮李艳华
Owner GEM CO LTD
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