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Method for recycling regenerated sodium ion battery cathode material from waste lithium cobalt oxide battery cathode material

A sodium-ion battery and battery positive electrode technology, which is applied in the field of recycling waste lithium cobalt oxide battery positive electrode materials to regenerate metal sulfide negative electrode materials for sodium-ion batteries, can solve the problems of long and complicated processes, and achieve the reduction of recycling processes, simple methods, and The effect of excellent electrochemical performance

Pending Publication Date: 2021-08-03
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is not difficult to find that the above-mentioned research reports generally dissolve the material first, and then regenerate it into a material after multiple treatments. The process is long and complicated.

Method used

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  • Method for recycling regenerated sodium ion battery cathode material from waste lithium cobalt oxide battery cathode material
  • Method for recycling regenerated sodium ion battery cathode material from waste lithium cobalt oxide battery cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Take 20 g of spent lithium cobaltate positive electrode powder and put it into a ball mill tank, put it into a ball mill, and grind it for 9 hours at a speed of 600 r / min to obtain a uniformly mixed powder material.

[0024] (2) Take 5g of sublimated sulfur and 5g of waste electrode materials and put them into different small porcelain boats, respectively, and place them in the upstream and middle parts of the tube furnace tube respectively. 2 Under the atmosphere, the temperature was raised to 700°C at a heating rate of 5°C / min and kept for 2h.

[0025] (3) Put the obtained composite material into a beaker, add 600mL deionized water at the same time, extract Li, and after ultrasonic treatment for 30min, perform suction filtration, and dry the filter cake in an oven at 120°C to obtain metal sulfide materials, phase test results such as figure 1 shown, for CoS 2 And the composite material of C can be directly used as the negative electrode material of sodium ion ba...

Embodiment 2

[0028] (1) Take 20 g of spent lithium cobaltate positive electrode powder and put it into a ball mill tank, put it into a ball mill, and grind it for 9 hours at a speed of 300 r / min to obtain a uniformly mixed powder material.

[0029] (2) Take 5g of sublimated sulfur and 5g of waste electrode materials and put them into different small porcelain boats, respectively, and place them in the upstream and middle parts of the tube furnace tube respectively. 2 Under the atmosphere, the temperature was raised to 600°C at a heating rate of 5°C / min and kept for 2h.

[0030] (3) Put the obtained composite material into a beaker, add 300mL deionized water at the same time, extract Li, and after ultrasonic treatment for 30min, perform suction filtration, and dry the filter cake in an oven at 120°C to obtain metal sulfide material.

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Abstract

A simple, convenient and efficient regeneration process is designed for the waste lithium cobalt oxide battery positive electrode material, cobalt resources in the waste lithium cobalt oxide positive electrode material can be reused and regenerated into a sodium ion battery metal sulfide negative electrode material, and the method belongs to the technical field of lithium ion battery material recovery. The method mainly comprises the following steps: 1, carrying out mechanical ball milling treatment on a waste positive lithium cobalt oxide powder material, so that a waste electrode composite material is uniformly mixed; 2, placing porcelain boats respectively filled with sublimed sulfur and waste electrode materials at the upstream part and the middle part of a tubular furnace, and carrying out high-temperature calcination in an Ar / H2 atmosphere to realize solid-solid conversion so as to realize the preparation of the metal sulfide in one step; 3, carrying out water extraction on the obtained metal sulfide material to extract lithium, and drying leached residues to directly use the dried leached residues 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 invention belongs to the field of recovery and reuse of waste lithium ion batteries, and in particular relates to a method for recovering and regenerating metal sulfide negative electrode materials of waste lithium cobalt oxide batteries. Background technique [0002] With people's increasing attention to the environment and resources, lithium-ion batteries are widely used in electric vehicles as a new type of power source to reduce greenhouse gas emissions. However, lithium-ion batteries have a short service life. In recent years, the number of scrapped lithium-ion batteries has risen exponentially. Waste lithium-ion battery materials contain a large amount of harmful and toxic substances and valuable metal resources. Therefore, the reasonable recycling of waste lithium-ion batteries can not only protect the environment, but also alleviate the shortage of resources and bring huge economic benefits. [0003] The patent with the publication number ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54
CPCH01M10/54Y02W30/84
Inventor 欧星肖志明高蕾
Owner CENT SOUTH UNIV
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