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Lithium-ion battery cathode material with super-lattice ordered structure and synthesizing method thereof

A lithium-ion battery and ordered structure technology, applied in battery electrodes, secondary batteries, structural parts, etc., can solve the problems of material particle fragmentation, low lithium ion conductivity, poor structural stability, etc., and achieve high magnification The effect of high performance, simple operation, and high specific capacity

Active Publication Date: 2018-09-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of low electronic conductivity and lithium ion conductivity, poor rate performance, poor structural stability and short cycle life of conventional layered lithium-ion battery cathode materials, and the expansion of the material lattice during charge and discharge cycles. and the fragmentation and pulverization of material particles caused by shrinkage, and provide a lithium-ion battery positive electrode material with a superlattice ordered structure and its synthesis method

Method used

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  • Lithium-ion battery cathode material with super-lattice ordered structure and synthesizing method thereof
  • Lithium-ion battery cathode material with super-lattice ordered structure and synthesizing method thereof
  • Lithium-ion battery cathode material with super-lattice ordered structure and synthesizing method thereof

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Embodiment 1

[0054] A method for synthesizing a lithium-ion layered battery cathode material with a superlattice ordered structure, the specific steps of the method are as follows:

[0055] First, the molar ratio of preparation is Ni:Co=4:1 and the nickel sulfate and cobalt sulfate mixed metal salt solution that total concentration is 2.0mol / L, and the preparation molar ratio is Ni:Mn=4:1 and total concentration is 2.0mol / L L of nickel sulfate and manganese sulfate mixed metal salt solution, 4.0mol / L complexing agent ammonia solution, 2.0mol / L precipitant sodium hydroxide solution.

[0056] Get 4.0mol / L complexing agent ammonia solution and dilute it into 0.5mol / L ammonia solution and add it to the reaction kettle as the reaction bottom liquid. inert N 2 Under the protection of the atmosphere, heat the reaction bottom solution to 50°C, and then mix the two mixed metal salt solutions, ammonia solution, and sodium hydroxide solution at a rate of 1.0mL / min:1.0mL / min:1.0mL / min:5mL / min Gradua...

Embodiment 2

[0066] A method for synthesizing a lithium-ion layered battery cathode material with a superlattice ordered structure, the specific steps of the method are as follows:

[0067] First, the molar ratio of preparation is Ni:Co=3:2 and the nickel sulfate and cobalt sulfate mixed metal salt solution that the total concentration is 2.0mol / L, and the preparation molar ratio is Ni:Mn=3:2 and the total concentration is 2.0mol / L L of nickel sulfate and manganese sulfate mixed metal salt solution, 4.0mol / L complexing agent ammonia solution, 2.0mol / L precipitant sodium hydroxide solution.

[0068] Get 4.0mol / L complexing agent ammonia solution and dilute it into 0.4mol / L ammonia solution and add it to the reaction kettle as the reaction bottom liquid. inert N 2 Under the protection of the atmosphere, heat the reaction bottom solution to 60°C, and then mix the two mixed metal salt solutions, ammonia solution, and sodium hydroxide solution at a rate of 1.0mL / min:1.0mL / min:1.0mL / min:5mL / min...

Embodiment 3

[0072] A method for synthesizing a lithium-ion layered battery cathode material with a superlattice ordered structure, the specific steps of the method are as follows:

[0073] First, the molar ratio of preparation is Ni:Co=3:2 and the nickel sulfate and cobalt sulfate mixed metal salt solution that total concentration is 2.0mol / L, and preparation molar ratio is Ni:Mn=2:2 and total concentration is 2.0mol / L L of nickel sulfate and manganese sulfate mixed metal salt solution, 2.0mol / L complexing agent ammonia solution, 2.0mol / L precipitant sodium hydroxide solution.

[0074] Get 2.0mol / L complexing agent ammonia solution and dilute it into 0.5mol / L ammonia solution and add it to the reaction kettle as the reaction bottom liquid. inert N 2 Under the protection of the atmosphere, heat the reaction bottom solution to 80°C, and then mix the two mixed metal salt solutions, ammonia solution, and sodium hydroxide solution at a rate of 1.0mL / min:1.0mL / min:1.0mL / min:5mL / min Gradually ...

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Abstract

The invention belongs to the technical field of lithium-ion battery materials and manufacturing processes thereof, and particularly discloses a lithium-ion battery cathode material with a super-lattice ordered structure and a synthesizing method thereof. The lithium-ion battery layered cathode material with the super-lattice ordered structure disclosed by the invention has a unique super-lattice ordered structure on the basis of keeping a hexagonal layered R-3m spatial group structure of a common layered cathode material. The lithium-ion battery cathode material disclosed by the invention is synthesized through a specially made double-kettle interconnected co-precipitation reaction kettle, and is synthesized through the following specific steps: firstly, preparing a solution; secondly, preparing a precursor; thirdly, embedding lithium into a high-temperature solid phase. The cathode material prepared by the synthesizing method is applied to a lithium-ion battery.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery materials and manufacturing techniques thereof, and in particular relates to a lithium-ion battery cathode material with a superlattice ordered structure, a synthesis method thereof, and a reaction kettle. Background technique [0002] With the advancement of science and technology and the rapid development of human society, people's demand for energy continues to grow. However, fossil fuels such as coal, oil, and natural gas, which are the main energy sources, are exploited and used in large quantities, which makes these non-renewable fossil energy sources exhausted day by day, and the problem of energy crisis is becoming more and more severe. The two major problems of energy shortage and environmental degradation have become the most severe challenges facing modern human society, seriously restricting economic development and social progress. Lithium-ion battery is currently recogni...

Claims

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Application Information

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IPC IPC(8): C01G53/00H01M4/505H01M4/525H01M10/0525
CPCC01G53/006C01P2002/72C01P2004/03H01M4/505H01M4/525H01M10/0525H01M2004/021Y02E60/10
Inventor 杜春雨徐星鉴纪源耿天凤贺晓书尹鸽平左朋建程新群霍华马玉林高云智
Owner HARBIN INST OF TECH
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