Method for comprehensively recovering anode materials of waste lithium ion batteries

A lithium-ion battery and cathode material technology, which is applied in the field of comprehensive recovery of useful elements in waste lithium-ion battery cathode materials, can solve the problems of high equipment requirements, increased energy consumption and cost, and achieve reduced energy consumption, fast response, and reduced costs Effect

Active Publication Date: 2018-09-21
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method also needs to consume a large amount of acid and reducing agent, and the leaching ball mill requires high equipment, which increases energy consumption and cost

Method used

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  • Method for comprehensively recovering anode materials of waste lithium ion batteries

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Get 100g of ternary battery cathode powder containing 10.63% cobalt, 6.50% lithium, 28.30% nickel, 11.75% manganese, and 3.75% iron, and mix it evenly with concentrated sulfuric acid with a mass concentration of 98% and anthracite coal powder with a fixed carbon content of 75%. The amount of concentrated sulfuric acid added is the total molar ratio of sulfuric acid to all metal elements in the positive electrode material 2:1, and the amount of anthracite powder added is the total molar ratio of the total carbon in the coal powder to all metal elements in the positive electrode material 1:2; After the material was stirred evenly, it was reacted and matured at 300°C for 2 hours, and the obtained matured material was soaked in water for 1 hour at 95°C and a liquid-solid ratio of 5:1mL / g. The composition is charcoal leaching residue, the leaching rate of cobalt is 99%, the leaching rate of lithium is 99%, the leaching rate of nickel is 98%, the leaching rate of manganese is ...

Embodiment 2

[0032] Take 100g of positive electrode powder containing 51.78% cobalt, 6.14% lithium, and 8.30% aluminum, and mix it evenly with concentrated sulfuric acid with a mass concentration of 98% and anthracite powder with a fixed carbon content of 75%. The total molar ratio of all metal elements is 2:1, and the amount of anthracite powder added is the total molar ratio of the total carbon in the coal powder to the total molar ratio of all metal elements in the positive electrode material; after the mixture is stirred evenly, it is reacted and matured at 250°C for 2 Hours, the obtained clinker was immersed in water for 1 hour at 95°C and a liquid-solid ratio of 8:1mL / g, and the solid-liquid separation obtained a solution containing cobalt, nickel, and lithium ions. The leaching solution was further purified and separated to recover nickel, cobalt, and lithium.

Embodiment 3

[0034] Take 100g of ternary battery positive electrode powder containing 4.95% cobalt, 2.99% lithium, 12.39% nickel, 17.01% manganese, 1.53% iron, and 15% moisture, and combine it with concentrated sulfuric acid with a mass concentration of 98% and coke with a fixed carbon content of 85%. Mix the powder evenly, wherein the added amount of concentrated sulfuric acid is the total molar ratio of sulfuric acid to all metal elements in the positive electrode material 2:1, and the added amount of coke powder is the total molar ratio of the total carbon in the coke powder to all metal elements in the positive electrode material 1 : 1; after the mixed material was stirred evenly, it was reacted and matured at 250°C for 2 hours, and the obtained cured material was soaked in water for 1 hour at 95°C and a liquid-solid ratio of 6:1mL / g, and the solid-liquid separation obtained the compound containing cobalt, nickel, manganese, and lithium ions. The solution, the leaching solution is furth...

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Abstract

The invention discloses a method for comprehensively recovering anode materials of waste lithium ion batteries and belongs to the technical field of lithium ion battery material recovery. The method comprises the steps that firstly, anode material powder obtained by splitting, crushing and screening the waste lithium ion batteries is evenly mixed with a certain number of carbon-containing solid reductants such as coal dust and coke powder and an appropriate amount of concentrated sulfuric acid, and then, after reaction curing is conducted in a period of time under the condition of the temperature of 100-300 DEG C, a solid clinker is obtained; and the solid clinker is subjected to slurrying leaching through water or dilute sulfuric acid, thus a leaching agent containing useful elements is obtained, and lithium, cobalt, nickel, manganese, vanadium and the like are recovered from the leaching agent. According to the method for comprehensively recovering the anode materials of the waste lithium ion batteries, the roasting activation process is not needed, thus energy consumption is low, and environment pollution is little; reagents which are wide in source and low in price are used, and thus the cost is low; and the concentrated sulfuric acid curing reaction condition is adopted, and thus the useful element recovery rate is high.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery material recovery, and in particular relates to a method for comprehensively recovering useful elements in waste lithium ion battery positive electrode materials. Background technique [0002] Due to its high working voltage and specific energy, stable discharge voltage, light weight and small size, long cycle life, and no memory effect, lithium-ion batteries are widely used in portable devices, electric vehicles, power reserves, satellites and other fields. With the advancement of lithium-ion battery technology and the increase in output, its waste is also increasing year by year. The lifespan of lithium-ion batteries is generally 2 to 3 years. At present, the recycling system has not yet reached a large scale, and the recovery rate is low. Most of the waste lithium-ion batteries have not been effectively treated, which not only pollutes the environment, but also wastes a lot of usefu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/00C22B26/12H01M10/54
CPCC22B7/007C22B23/043C22B26/12H01M10/54Y02P10/20Y02W30/84
Inventor 蒋训雄赵峰汪胜东蒋伟刘巍李达
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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