Metal doping LiMn(1-x-y)NixCoyO2 compounded by lithium ion battery positive electrode waste, as well as preparation method and application of metal doping LiMn(1-x-y)NixCoyO2

A technology of nickel-cobalt lithium manganese oxide and lithium-ion batteries, which is applied in the field of metal-doped nickel-cobalt lithium manganese oxide and its preparation, can solve the problems of long process flow, narrow application range, and high processing cost of waste lithium-ion battery recycling technology. To achieve the effect of short-range cleaning cycle, wide application range and simple operation

Active Publication Date: 2015-09-30
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] In view of the deficiencies in the prior art, in order to solve the problems of long process flow, high processing cost, narrow scope of application, secondary pollution, etc. of waste lithium ion battery recycling technology and to fill in the gaps in related technologies, the purpose of the present invention is to provide a battery that uses lithium ion batteries. Metal-doped nickel-cobalt lithium manganese oxide synthesized from battery positive electrode waste and its preparation method and use, the method overcomes the shortcomings of the prior art and improves the electrochemical performance of lithium-ion battery positive electrode materials

Method used

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  • Metal doping LiMn(1-x-y)NixCoyO2 compounded by lithium ion battery positive electrode waste, as well as preparation method and application of metal doping LiMn(1-x-y)NixCoyO2
  • Metal doping LiMn(1-x-y)NixCoyO2 compounded by lithium ion battery positive electrode waste, as well as preparation method and application of metal doping LiMn(1-x-y)NixCoyO2
  • Metal doping LiMn(1-x-y)NixCoyO2 compounded by lithium ion battery positive electrode waste, as well as preparation method and application of metal doping LiMn(1-x-y)NixCoyO2

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Effect test

Embodiment 1

[0060] Take 10 g of nickel-cobalt lithium manganate positive electrode material containing a small amount of impurity aluminum separated by the method described in CN102751549B, and synthesize an aluminum-doped nickel-cobalt lithium manganate positive electrode active material according to the following steps, the specific steps are as follows:

[0061] (1) Put the separated nickel cobalt lithium manganese oxide positive electrode waste containing a small amount of impurity aluminum in a constant temperature resistance furnace at 600 ° C for 5 hours to obtain the positive active material, and use an infrared carbon-sulfur analyzer to detect the mass fraction of carbon in the positive active material If it is less than 0.001%, it indicates that the conductive agent and binder in the positive electrode active material are completely removed.

[0062] (2) Add 0.5 g of the positive electrode active material obtained in step (1) into aqua regia, heat and digest for 2 hours, and then...

Embodiment 2

[0073] According to the mass ratio of 1:2:1, lithium cobalt oxide (LiCoO) produced in the production process of lithium-ion batteries was taken respectively. 2 ), lithium nickel manganese oxide (LiNi 1 / 2 mn 1 / 2 o 2 ) and lithium nickel cobalt manganese oxide (LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 ) positive electrode waste 20g, of which LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 Al 2 o 3 Nanoparticle-coated and modified materials, using NMP to dissolve the binder to separate the above-mentioned mixed positive electrode material, and synthesize the aluminum-doped nickel-cobalt lithium manganese oxide positive electrode active material according to the following steps, the specific steps are as follows:

[0074] (1) The separated Al 2 o 3 The mixed positive electrode waste was placed in a 400°C constant temperature resistance furnace and roasted for 8 hours to obtain the positive electrode active material. The mass fraction of carbon in the positive electrode active material was detected by a...

Embodiment 3

[0087] Take the lithium cobalt oxide (LiCoO) separated from the lithium-ion battery 2 ) positive electrode waste 10g and lithium nickel manganese oxide (LiNi 1 / 2 mn 1 / 2 o 2 ) positive electrode waste 20g, use NMP to dissolve the binder to separate the positive electrode material in the above mixed positive electrode waste, and mix evenly, which contains a small amount of fine copper foil fragments mixed in when the waste lithium-ion battery is disassembled and separated. Synthesize copper-doped Miscellaneous nickel cobalt lithium manganese oxide positive electrode active material, concrete steps are as follows:

[0088] (1) Put the separated mixed positive electrode waste containing a small amount of copper foil fragments in a muffle furnace at 1000°C for 2 hours to obtain the positive active material, and use an infrared carbon-sulfur analyzer to detect that the mass fraction of carbon in the positive active material is less than 0.001 %, indicating that the positive elect...

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Abstract

The invention provides metal doping LiMn(1-x-y)NixCoyO2 compounded by lithium ion battery positive electrode waste, as well as a preparation method and an application of the metal doping LiMn(1-x-y)NixCoyO2. The method comprises the steps: removing a binder and a conductive agent from the lithium ion battery positive electrode waste so as to obtain a positive electrode active material; determining the element composition of the positive electrode active material; adjusting the content / contents of one or more of Ni, Co, Mn and M in the positive electrode active material, so as to enable a molar ratio to accord with the molar ratio of Ni to Co to Mn to M in the molecular formula LiNixMnyCo(1-x-y-z)MzO2 so as to obtain positive electrode active material precursor powder; and adding a lithium source, and performing high-temperature solid-phase reaction so as to obtain metal doping LiMn(1-x-y)NixCoyO2. The method is wide in application range, easy to operate, low in cost and capable of avoiding secondary pollution, and achieving the short-range cleaning circulation of the positive electrode active material in a waste lithium ion battery. The prepared metal doping LiMn(1-x-y)NixCoyO2 is excellent in electrochemical performance.

Description

technical field [0001] The invention belongs to the technical field of secondary resource recycling and circular economy, and relates to a method for recycling and recycling lithium-ion battery positive electrode waste, in particular to a metal-doped nickel-cobalt lithium manganate synthesized by using lithium-ion battery positive electrode waste and Its preparation method and use. Background technique [0002] Due to the advantages of high charging voltage, high energy density, long cycle life, good safety, no memory effect and small self-discharge, lithium-ion batteries have been widely used in mobile phones, notebook computers, video cameras, digital batteries since the 1990s. Portable electronics such as cameras and medical devices. With the rapid development of lithium-ion battery technology in recent years, it has become a strong competitor for hybrid electric vehicles, pure electric vehicles and smart grid power supplies. At the same time, due to the accelerated upd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/54H01M4/525H01M4/505
CPCH01M4/131H01M4/505H01M4/525H01M10/0525H01M10/54Y02E60/10Y02W30/84
Inventor 谢勇冰曹宏斌张西华宁朋歌林晓
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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