Method for simultaneously recycling and preparing carbon-based metal sulfide negative electrode material from waste nickel-cobalt-manganese lithium ion battery positive electrode material and waste cobalt-manganese lithium ion battery negative electrode material

A nickel-cobalt-manganese-lithium-ion battery technology, which is applied in the field of waste lithium-ion battery recycling and reuse, can solve the problems of complex process, long process, and little attention to lithium-ion battery material graphite, etc. The method is simple, the recycling process is reduced, The effect of excellent electrochemical performance

Active Publication Date: 2021-08-03
CENT SOUTH UNIV
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Problems solved by technology

It is not difficult to find that the above-mentioned research reports generally carry out acid leaching and dissolving the materials first, and then regenerate them into materials after multiple treatments. The process is long and the process is very complicated; Graphite gets little attention

Method used

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  • Method for simultaneously recycling and preparing carbon-based metal sulfide negative electrode material from waste nickel-cobalt-manganese lithium ion battery positive electrode material and waste cobalt-manganese lithium ion battery negative electrode material

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Experimental program
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Effect test

Embodiment 1

[0023] (1) Take 3G waste graphite, 17 g of used nickel-manganese three-dimensional powder and 10 g of sublimation sulfur to the ball mill, placed in a ball mill, ground 18 h, ground 18 h, resulting in uniform mixing powder material.

[0024] (2) Take 5G powder into small porcelain, and placed it in the middle of the tube furnace tube, in Ar / h 2 Under the atmosphere, heated at a temperature rise rate of 5 ° C / min to 700 ° C for 2 h.

[0025] (3) The obtained composite is placed in a beaker while adding 600 ml of deionized water, extracting Li, after 30 min under ultrasound conditions, filtered, filter cake drying in an oven at 120 ° C to obtain a carbon group The sulfide composite can be used directly for the sodium ion battery negative electrode material.

[0026] (4) Electrochemical properties test at room temperature conditions. The results show that( figure 1 ), At 0.5a / g, after 100 laps, the specific capacity is 558.3mAh / g, exhibiting high specific capacity and good cy...

Embodiment 2

[0028] (1) Take 3G waste graphite, 17g used nickel-watenganese ternary positive electrode powder and 20 g of sublimation sulfur to the ball mill, placed in a ball mill, and ground 8 h, ground 8 h, to obtain a uniform mixed powder material.

[0029] (2) Take 5 g of powder into small porcelain, and placed it in the intermediate portion of the tubular furnace tube, under the AR atmosphere, the temperature rise rate of 5 ° C / min is heated to 600 ° C, maintained for 2 h.

[0030] (3) Put the obtained composite material into the beaker while adding 300 ml of deionized water, extracting Li, after 30 min under ultrasound conditions, filtered, filter cake drying in an oven at 120 ° C to obtain a carbon group The sulfide composite is directly used in the sodium ion battery negative electrode material.

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Abstract

The invention designs a simple, convenient and efficient regeneration process for a waste nickel-cobalt-manganese ternary lithium ion electrode material, so that a waste nickel-cobalt-manganese positive electrode material and a graphite negative electrode material are simultaneously recycled and regenerated into a sodium ion battery negative electrode material, and belongs to the technical field of lithium ion battery material recycling. The method mainly comprises the following steps: 1, mixing waste anode powder, waste cathode powder and sublimed sulfur according to a certain proportion, and carrying out mechanical ball milling to realize uniform compounding; 2, performing high-temperature calcination in a tubular furnace, and achieving the preparation of the carbon-based metal sulfide composite material in one step; 3, extracting lithium from the composite material by water leaching, and drying the leaching residue to directly use the leaching residue as a sodium ion battery negative electrode material. According to the invention, the pressure of environment and resources can be effectively relieved, and huge economic benefits are brought. Meanwhile, the method is simple and efficient in process and beneficial to large-scale preparation.

Description

Technical field [0001] The present invention belongs to the field of waste lithium ion battery recovery and reuse, and more particularly to the method of simultaneously recovering the preparation of sodium ion battery negative electrode materials in the simultaneous material of waste nickel manganese. Background technique [0002] As people pay more attention to environmental and resources, the lithium-ion battery is widely used in electric vehicles as a new type of power source to reduce greenhouse gas emissions. However, the lithium-ion battery has a short service life. In recent years, the number of revisit numbers of lithium-ion batteries has become an index rise. Waste lithium-ion battery materials include a large number of harmful, toxic substances and viable metal resources, and thus reasonable recovery of waste lithium-ion batteries can not only protect the environment, but also alleviate resources, bring huge economic benefits. At the same time, the waste negative materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/587H01M10/054H01M10/54
CPCH01M4/362H01M4/5815H01M4/587H01M10/054H01M10/54H01M2004/027Y02W30/84Y02E60/10
Inventor 欧星肖志明高蕾
Owner CENT SOUTH UNIV
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