Novel method for preparing lithium ion battery anode ternary material LiCoxNiyMn2O2

A lithium-ion battery, a new method of technology, applied in battery electrodes, electrical components, circuits, etc., can solve the problems of difficult to precisely control the uniform and synchronous precipitation of various elements, complex liquid phase process conditions, and long mixing time. Realize the effect of environment-friendly production, low cost and short processing cycle

Inactive Publication Date: 2009-02-18
ZHEJIANG HUAYOU COBALT
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Problems solved by technology

[0005] However, both the liquid phase method and the solid phase method have their disadvantages. The liquid phase method has complex process conditions, it is difficult to accurately control the uniform and simultaneous precipitation of various elements, and it needs to consume a lot of water, which is easy to cause environmental pollution.
The solid-phase method generally uses ball milling to mix the simple substances or compounds of various metals uniformly. This method takes a long time for mixing, and it is difficult to evenly distribute the components of various metal elements, which is easy to cause component segregation. It is easy to bring impurities in the process of feeding

Method used

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  • Novel method for preparing lithium ion battery anode ternary material LiCoxNiyMn2O2

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1, with reference to figure 1 .

[0019] Using cobalt chloride, nickel chloride and manganese chloride as raw materials, according to the ratio of nCo:nNi:nMn=1:1:1, dissolve and mix the samples, and obtain uniformly mixed Co+Ni+Mn of 0.8~3.3mol / L cobalt / nickel / manganese chloride salt solution. The above solution is pressure sprayed under the pressure of 0.2-6MPa to obtain mist droplets, and the mist droplets obtained by spraying are roasted in a dynamic roasting furnace under air or oxygen atmosphere at 600-1000°C to obtain cobalt Nickel manganese composite oxide. The cobalt-nickel-manganese composite oxide obtained by spray roasting is used as a precursor, mixed with lithium carbonate according to n(Co / Ni / Co):nLi=1:1-1.5, and roasted at 700-1000°C for 9-20h to obtain LiCo 1 / 3 Ni 1 / 3 mn 1 / 3 o 2 . The tail gas generated during the spray roasting process is rinsed and absorbed to obtain regenerated hydrochloric acid.

Embodiment 2

[0020] Embodiment 2, with reference to figure 1 .

[0021] Using cobalt chloride, nickel chloride and manganese chloride as raw materials, according to the ratio of nNi:nCo:nMn = 8:1:1, dissolving and mixing, to obtain uniformly mixed Co+Ni+Mn of 0.8 ~ 3.3mol / L nickel / cobalt / manganese chloride salt solution. The above solution is pressure sprayed under the pressure of 0.2-5MPa to obtain mist droplets, and the mist droplets obtained by spraying are roasted in a dynamic roasting furnace under an air or oxygen atmosphere at 600-1000°C to obtain cobalt Nickel manganese composite oxide. The cobalt-nickel-manganese composite oxide obtained by spray roasting is used as a precursor, mixed with lithium carbonate according to n(Co / Ni / Co):nLi=1:1-1.5, and roasted at 700-1000°C for 9-20h to obtain LiNi 0.8 co 0.1 mn 0.1 o 2 . The tail gas generated during the spray roasting process is rinsed and absorbed to obtain regenerated hydrochloric acid.

Embodiment 3

[0022] Embodiment 3, with reference to figure 1 .

[0023] Using cobalt chloride, nickel chloride and manganese chloride as raw materials, according to the ratio of nNi:nCo:nMn=4:2:4, dissolve and mix the samples, and obtain uniformly mixed Co+Ni+Mn with a content of 0.8-3.3mol / L nickel / cobalt chloride salt solution. The above solution is pressure sprayed under the pressure of 0.2-6MPa to obtain mist droplets, and the mist droplets obtained by spraying are roasted in a dynamic roasting furnace under air or oxygen atmosphere at 600-1000°C to obtain cobalt Nickel composite oxide. The cobalt-nickel composite oxide obtained by spray roasting is used as a precursor, mixed with lithium hydroxide according to n(Ni / Co / Mn):nLi=1:1-1.5, and roasted at 700-1000°C for 9-20h to obtain LiNi 0.4 co 0.2 mn 0.4 o 2 . The tail gas generated during the spray roasting process is rinsed and absorbed to obtain regenerated hydrochloric acid.

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Abstract

The invention relates to a preparation method of ternary system material, in particular to a preparation method of lithium cobalt nickel manganese oxide ternary system material for lithium ion batteries. The invention applies ensured ternary system material salt as raw material. After needed matching weight, by means of eve dissolving and mixing, a composite metal oxide prepared by a spray-roasting method is used as a fore body. The fore body is mixed with a lithium-source compound according to the substance amount of 1:1-1.5, and then roasting is carried out at the temperature of 700 to 1000 degrees centigrade to obtain the ternary system material. The tail gases, such as vapor, acidic gas, generated in the spray-roasting process are absorbed by a washing tower to obtain acid. The invention has the advantages of advanced technique, stable production, low cost, no waste water discharge, environmental protection, high product purity, even granularity, high crystallinity, etc.

Description

technical field [0001] The present invention relates to the preparation method of ternary system material, be specifically related to LiCo for lithium ion battery x Ni y mn z o 2 Preparation methods of ternary materials. Background technique [0002] Ternary materials refer to lithium-cobalt-nickel-manganese-oxygen, lithium-cobalt-nickel-aluminum-oxygen or lithium-cobalt-nickel, etc., which are mainly studied in order to overcome the shortcomings of lithium-cobalt-oxygen, lithium-nickel-oxygen or lithium-manganese-oxygen. compound compound. At present, the synthesis methods of ternary materials basically adopt liquid phase co-precipitation method and solid phase synthesis method. [0003] The liquid-phase co-precipitation method will be to use various target metal salt solutions in the liquid phase state, select a suitable precipitant, make it undergo a co-precipitation reaction, and obtain a composite metal salt precipitate, which is used as a precursor, and then The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/48H01M4/505H01M4/525
CPCY02E60/10
Inventor 刘秀庆向波翟世双
Owner ZHEJIANG HUAYOU COBALT
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