Method for recycling lithium from waste ternary lithium ion battery

A lithium-ion battery, lithium recovery technology, applied in battery recycling, waste collector recycling, recycling technology and other directions, to achieve the effect of expanding production, high purity and low cost

Active Publication Date: 2017-07-07
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the existing problems of lithium recovery in the existing waste ternary lithium-ion batteries, the present invention provide

Method used

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  • Method for recycling lithium from waste ternary lithium ion battery
  • Method for recycling lithium from waste ternary lithium ion battery
  • Method for recycling lithium from waste ternary lithium ion battery

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0036] A method for reclaiming lithium from waste and old ternary lithium-ion battery active materials, comprising the following steps:

[0037] (1) Assembled and scrapped LiNi in the laboratory 1 / 3 co 1 / 3 mn 1 / 3 o 2 Place in graphite-containing solid powder and discharge for 12 hours, then disassemble and vibrate to obtain mixed powder of positive and negative active materials.

[0038] (2) Pass the mixed powder of positive and negative active materials through a 180-mesh sieve, and collect the sieved active material powder.

[0039] (3) Take 10g of the positive and negative active material mixed powder and mix them evenly with 5g of NaOH powder;

[0040] (4) Roasting the mixed powder of the active material and NaOH at 500°C for 4h;

[0041] (5) adding the roasted material into water and filtering;

[0042] (6) Add 0.5mol / L Na to the filtrate 2 CO 3 Solution, if there is precipitation, stir thoroughly for a period of time until no new precipitation is formed;

[0043...

Embodiment 2

[0046] A method for reclaiming lithium from waste and old ternary lithium-ion battery active materials, comprising the following steps:

[0047] (1) The acquisition of the active substance is the same as in Example 1, and the mixed powder of the positive and negative active substances of 10g is mixed with 5g NaOH;

[0048] (2) Roasting the mixed powder of active material and NaOH at 500°C for 2h;

[0049] (3) adding the roasted material into water and filtering;

[0050] (4) Add 0.5mol / L Na to the filtrate2 CO 3 Solution, if there is precipitation, stir thoroughly for a period of time until no new precipitation is formed;

[0051] (5) Filter the suspension in (4), and the obtained filter cake is Li 2 CO 3

[0052] Adopt present embodiment to reclaim lithium recovery rate from waste and old ternary lithium ion battery as follows figure 1 As shown, it shows that after 10g of ternary battery active material powder is treated above, the recovery rate of lithium is 60.3%.

Embodiment 3

[0054] A method for reclaiming lithium from waste and old ternary lithium-ion battery active materials, comprising the following steps:

[0055] (1) The acquisition of the active substance is the same as in Example 1, and the mixed powder of the positive and negative active substances of 10g is mixed with 5g NaOH;

[0056] (2) Roasting the mixed powder of active material and NaOH at 600°C for 3h;

[0057] (3) adding the roasted material into water and filtering;

[0058] (4) Add 0.5mol / L Na to the filtrate 2 CO 3 Solution, if there is precipitation, stir thoroughly for a period of time until no new precipitation is formed;

[0059] (5) Filter the suspension in (4), and the obtained filter cake is Li 2 CO 3

[0060] Using this example to recover lithium from waste ternary lithium-ion batteries, it shows that after 10 g of ternary battery active material powder is treated above, the recovery rate of lithium is 82.1%.

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Abstract

The invention discloses a method for recycling lithium from a waste ternary lithium ion battery. According to the method, the waste ternary lithium ion battery is detached, an electrode active material is separated out, and is evenly mixed with sodium hydroxide and/or potassium hydroxide, and low-temperature roasting is carried out; a roasted material and water are evenly stirred and mixed, liquid-solid separation is carried out, a carbonate precipitant is added into an obtained liquid phase, and lithium carbonate sedimentation is generated. Through the method, the lithium can be rapidly and efficiently recycled from the waste ternary lithium ion battery, the cost is low, and the method is suitable for industrial application.

Description

technical field [0001] The invention relates to a treatment method for waste lithium ion batteries, in particular to a method for recovering lithium from waste ternary lithium ion batteries, and belongs to the field of waste lithium ion battery recovery. Background technique [0002] According to the data released by the Ministry of Industry and Information Technology, in the first half of 2014, the total output value of my country's lithium-ion battery industry has reached 40 billion yuan, and the sales revenue of batteries has also reached 27.7 billion yuan. In the entire sales market share, consumption-type lithium-ion batteries accounted for 87%, power-type batteries accounted for 10%, and energy-storage batteries accounted for only 3%. Although the current battery production is already large, the battery market for plug-in electric vehicles and hybrid electric vehicles has continued to grow rapidly in the past three years. It has tripled in three years, and the demand f...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B7/00C22B26/12H01M10/54
CPCC22B1/02C22B7/001C22B7/006C22B26/12H01M10/54Y02P10/20Y02W30/84
Inventor 张治安赖延清吴剑杨声海洪波方静张凯李劼
Owner CENT SOUTH UNIV
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