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Rate type lithium ion battery anode composite and preparation method thereof

A lithium-ion battery and composite material technology, which is applied in the preparation of lithium-ion battery materials and battery materials, can solve the problems of poor rate performance and other problems, and achieve the effects of improving rate performance, easy control, and reducing accumulation

Pending Publication Date: 2018-06-08
内蒙古欣源石墨烯科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a negative electrode composite material of a rate type lithium ion battery and a preparation method thereof, which solves the problem of poor rate type performance of current lithium ion battery negative electrode materials under high rate conditions, and also has the advantages of simple preparation, simple process, easy control, and low price. , which is conducive to the industrial production of lithium-ion battery anode materials

Method used

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  • Rate type lithium ion battery anode composite and preparation method thereof
  • Rate type lithium ion battery anode composite and preparation method thereof
  • Rate type lithium ion battery anode composite and preparation method thereof

Examples

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Effect test

Embodiment 1

[0023] Step 1. the preparation method of inorganic lithium compound compound liquid and hard carbon solution;

[0024] A) The preparation method of the inorganic lithium compound compound liquid;

[0025] In a nitrogen atmosphere, weigh 8g of lithium carbonate, 2g of carbon nanotubes, and 1g of sodium dodecylbenzenesulfonate and add them to 500g of ethanol and stir to make it uniform;

[0026] B) Preparation method of hard carbon solution

[0027] Dissolve 80g of thermosetting phenolic resin material in 500g of ethanol organic solvent and stir evenly;

[0028] Step 2. Preparation of graphite inorganic / lithium composite:

[0029] Weigh 150g of artificial graphite powder with a particle size D50 of 10µm and a sphericity of 0.8, add it to the inorganic lithium compound compound liquid, and mill the graphite in a ball mill for 3 hours. After mixing evenly, stir at 80°C for 2 hours under stirring, and then cool , sieving to obtain graphite inorganic / lithium composite;

[0030] ...

Embodiment 2

[0033] Step 1. the preparation method of inorganic lithium compound compound liquid and hard carbon solution;

[0034] A) Preparation method of inorganic lithium compound compound solution:

[0035] In a helium atmosphere, weigh 5g of lithium hydroxide, 1g of carbon nanotubes, and 0.5g of sodium dodecylbenzenesulfonate and add them to 500g of ethanol and stir evenly to obtain an inorganic lithium compound compound solution;

[0036] B) Preparation method of hard carbon solution

[0037] Dissolve 50g of epoxy resin material in 500g of chloroform organic solvent and stir evenly to obtain hard carbon solution;

[0038] Step 2. Preparation of graphite / inorganic lithium composite:

[0039] Weigh 100g of natural graphite powder with a particle size D50 of 8µm and a sphericity of 0.6, add it to the inorganic lithium composite solution A, and mill the graphite in a ball mill for 1 hour. After mixing evenly, stir at 50°C for 2 hours under stirring, and then cool , sieving to obtain ...

Embodiment 3

[0043] Step 1. the preparation method of inorganic lithium compound compound liquid and hard carbon solution;

[0044] A) Preparation method of inorganic lithium compound compound solution:

[0045] In argon, weigh 10g of lithium metaaluminate powder, 2g of carbon nanotubes, and 1g of sodium dodecylbenzenesulfonate and add them to 500g of ethanol and stir evenly to obtain an inorganic lithium composite solution;

[0046] B) Preparation method of hard carbon solution

[0047] Dissolve 100g of phenolic resin polymer material in 500g of N-methylpyrrolidone organic solvent and stir to obtain a hard carbon solution;

[0048] Step 2. preparation of graphite inorganic lithium complex:

[0049] Then weigh 200g of artificial graphite powder with a particle size D50 of 12µm and a sphericity of 0.9, add it to the inorganic lithium composite solution, and mill the graphite in a ball mill for 5 hours. After mixing evenly, stir at 100°C for 2 hours under stirring, and then cool , sieving...

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Abstract

The invention discloses a rate type lithium ion battery anode composite and a preparation method thereof, and relates to the field of preparation of a battery material, in particular to the field of preparation of a lithium ion battery material. The battery anode composite is characterized in that the anode composite adopts a core-shell structure, the core is graphite, the middle layer is a lithium supplement layer and the outer layer is a hard carbon layer; the core and the middle layer are prepared into a graphite / inorganic lithium compound with an inorganic lithium compound complex liquid,then, the graphite / inorganic lithium compound is added to a hard carbon solution, and the rate type lithium ion battery anode composite is prepared. The problem of poor rate performance of existing lithium ion battery anode materials under the high rate condition is solved. The rate type lithium ion battery anode composite is simple to prepare, the process is simple and easy to control, the cost is low, and industrial production of lithium ion battery anode materials is facilitated.

Description

technical field [0001] The invention relates to the field of battery material preparation, in particular to the field of lithium ion battery material preparation. Background technique [0002] At present, the anode materials of commercial lithium-ion batteries are mainly graphite materials. All directly affect the development process of lithium-ion batteries in the field of power and energy storage batteries. For example, the graphite material has high activity, that is, it has poor compatibility with the electrolyte. At present, the graphite material mainly improves the compatibility between the negative electrode material and the electrolyte through surface coating modification, so as to improve the cycle and rate of the material. Graphitized carbon materials have a good layered structure, which is very suitable for the intercalation and deintercalation of lithium ions. However, due to the small interlayer spacing of graphite, the slow rate of lithium ion intercalation du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62
CPCH01M4/62H01M4/625Y02E60/10
Inventor 薛永谢志懋
Owner 内蒙古欣源石墨烯科技股份有限公司
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