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Remanufacturing process of Li(Ni, Co, Al)O2 positive electrode material for vehicle power battery

A nickel-cobalt-aluminate lithium, power battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of low effective resource recycling rate, easy introduction of impurities, cost, complex process, etc. The effect of small damage to physical and chemical properties and simple process

Inactive Publication Date: 2018-05-11
JINGMEN GEM NEW MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the above-mentioned problems in the recovery of the existing lithium-ion positive electrode materials such as low effective recovery and utilization rate of resources, complex process, easy introduction of impurities and high cost, the embodiment of the present invention provides a nickel-cobalt-lithium-aluminate positive electrode for a vehicle power battery material recycling process

Method used

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  • Remanufacturing process of Li(Ni, Co, Al)O2 positive electrode material for vehicle power battery
  • Remanufacturing process of Li(Ni, Co, Al)O2 positive electrode material for vehicle power battery
  • Remanufacturing process of Li(Ni, Co, Al)O2 positive electrode material for vehicle power battery

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specific Embodiment approach

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] Such as figure 1 As shown, the embodiment of the present invention provides a remanufacturing process of nickel-cobalt-lithium aluminate positive electrode material for vehicle power batteries, which at least includes the following steps:

[0021] 1) Perform cracking treatment on the invalid nickel-cobalt-lithium-aluminate positive electrode sheet to obtain the cracked material;

[0022] 2) sieving the cracked material obtained in step 1), and collecting the nickel-cobalt-lithium-aluminate powder obtained by sieving;

[0023] 3) performing cyclone classification on the nickel-cobalt-lithiu...

Embodiment 1

[0040] A process for remanufacturing a nickel-cobalt-lithium-aluminate cathode material for a power battery for a vehicle, comprising the following steps:

[0041] 1) Put a tray of 1 kg of waste nickel-cobalt-lithium aluminate cathode sheet into the cracking furnace, heat up to 500°C, and crack for 3 hours. The binder PTFE will fail to crack, and the active material nickel-cobalt-lithium aluminate and other powders will be removed from the current collector aluminum foil fall off;

[0042] 2) Take out the tray, and after the cracked product is cooled, put the cracked product together into a 500r / min drum sieving machine to sieve for 2 hours, and collect nickel-cobalt-lithium-aluminate powder;

[0043] 3) According to step 2), collect the difference in physical properties of the material in the powder, and use cyclone classification to purify the active material of nickel cobalt lithium aluminate, remove the fine powder with particles smaller than 5 μm and a little light conduc...

Embodiment 2

[0051] A process for remanufacturing a nickel-cobalt-lithium-aluminate cathode material for a power battery for a vehicle, comprising the following steps:

[0052] 1) Put 5kg of waste nickel-cobalt-lithium-aluminate positive plate trays into the cracking furnace, heat up to 600°C, and crack for 2 hours. The binder PTFE will fail to crack, and the active material nickel-cobalt-lithium aluminate and other powders will be removed from the current collector aluminum foil fall off;

[0053] 2) Take out the tray, and after the cracked product is cooled, put the cracked product together into a 600r / min drum sieving machine to sieve for 3 hours, and collect nickel-cobalt-lithium-aluminate powder;

[0054] 3) According to step 2), collect the difference in physical properties of the material in the powder, and use cyclone classification to purify the active material of nickel cobalt lithium aluminate, remove the fine powder with particles smaller than 5 μm and a little light conductive...

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Abstract

The invention discloses a remanufacturing process of a Li(Ni, Co, Al)O2 positive electrode material for a vehicle power battery. The process includes at least the following steps: 1) cracking a spentLi(Ni, Co, Al)O2 positive electrode sheet to obtain a cracked material; 2) sieving the cracked material obtained in step 1) and collecting the sieved Li(Ni, Co, Al)O2 powder; 3) performing cyclonic grading treatment on the sieved Li(Ni, Co, Al)O2 powder obtained in the step 2) to collect a Li(Ni, Co, Al)O2 material; and 4) mixing the Li(Ni, Co, Al)O2 material obtained in the step 3) with a lithiumsalt, and placing a mixture obtained by mixing into a flowing oxygen atmosphere for sintering. The remanufacturing process has less damage to the physicochemical properties of active materials, has the advantages of high repair rate, low cost, and small pollution and the like, and is suitable for popularization and application.

Description

technical field [0001] The invention relates to the technical field of recycling nickel-cobalt-lithium-aluminate materials of waste batteries, in particular to a process for remanufacturing a nickel-cobalt-lithium-aluminate positive electrode material of a vehicle power battery. Background technique [0002] Lithium Nickel Cobalt Aluminate Li[Ni-Co-Al]O 2 (abbreviation: NCA) positive electrode material has a ternary layered structure, and the aluminum ions in it can inhibit the change of crystal structure during charging and discharging. It has good thermal stability, high discharge capacity and cycle performance when used in power lithium batteries. Good, low toxicity and other advantages. Therefore, NCA has become one of the hottest materials in the research and application of cathode materials for lithium-ion batteries. [0003] With the rapid development of new energy vehicles and the application technology of lithium-ion power batteries in electric vehicles is becomin...

Claims

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Application Information

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IPC IPC(8): H01M4/525H01M10/0525
CPCH01M4/525H01M10/0525Y02E60/10
Inventor 张云河许开华叶建郭苗苗
Owner JINGMEN GEM NEW MATERIAL