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Slurry for preparing negative electrode material and preparation method of negative electrode material

A technology of negative electrode material and slurry, applied in the field of preparation of slurry and negative electrode material, can solve problems such as poor comprehensive performance, and achieve the effect of enhancing battery safety performance, high rate performance, and improving rate performance

Active Publication Date: 2019-10-25
SHENZHEN LI S TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Fe prepared by existing methods and raw materials 3 The comprehensive performance of C and its derivatives is poor, thus limiting the Fe 3 Application of C and its derivatives in lithium batteries

Method used

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  • Slurry for preparing negative electrode material and preparation method of negative electrode material
  • Slurry for preparing negative electrode material and preparation method of negative electrode material
  • Slurry for preparing negative electrode material and preparation method of negative electrode material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The present invention provides a kind of slurry that prepares negative electrode material and the preparation method of negative electrode material, and described slurry comprises the following components of mass percentage:

[0035] Organic solvent 99.91%,

[0036] Active substance 0.09%;

[0037] The organic solvent is a combination of 50 wt% oleic acid and 50 wt% octadecene; the active substance is iron acetylacetonate.

[0038] The preparation method of described negative electrode material, comprises the following steps:

[0039] S1: Weigh the organic solvent and the active material according to the mass ratio, and put them in a container for mixing to obtain a slurry for preparing the negative electrode material of the lithium battery.

[0040] S2: Vacuumize the container containing the slurry for preparing the negative electrode material of the lithium battery in step S1 to a negative pressure of 3 kpa, and pass through argon gas after stabilizing at room tempe...

Embodiment 2

[0053] The present invention provides a kind of slurry that prepares negative electrode material and the preparation method of negative electrode material, and described slurry comprises the following components of mass percentage:

[0054] Organic solvent 99.6%,

[0055] Active substance 0.4%;

[0056] The organic solvent is a combination of 40wt% polyethylene glycol and 60wt% octadecene; the active substance is ferric hydroxide.

[0057] The preparation method of described negative electrode material, comprises the following steps:

[0058] S1: Weigh the organic solvent and the active material according to the mass ratio, and put them in a container for mixing to obtain a slurry for preparing the negative electrode material of the lithium battery.

[0059] S2: Vacuumize the container containing the slurry for preparing the lithium battery negative electrode material in step S1 to a negative pressure of 2 kpa, and pass it through argon gas after stabilizing at room temperat...

Embodiment 3

[0065] The present invention provides a kind of slurry that prepares negative electrode material and the preparation method of negative electrode material, and described slurry comprises the following components of mass percentage:

[0066] Organic solvent 95%,

[0067] active substance 5%;

[0068] The organic solvent is a combination of 60 wt% oleic acid and 40 wt% polyethylene glycol; the active substance is iron carbonyl.

[0069] The preparation method of described negative electrode material, comprises the following steps:

[0070] S1: Weigh the organic solvent and the active material according to the mass ratio, and put them in a container for mixing to obtain a slurry for preparing the negative electrode material of the lithium battery.

[0071] S2: Vacuumize the container containing the slurry for preparing the lithium battery negative electrode material in step S1 to a negative pressure of 3kpa, and pass it into argon after stabilizing at room temperature for 60 mi...

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Abstract

The invention discloses slurry for preparing a negative electrode material and a preparation method of the negative electrode material. The slurry includes the following components in percentage by mass: 90%-99.98% of an organic solvent and 0.02%-10% of an active substance, wherein the organic solvent includes the combination of at least two of oleylamine, polyethylene glycol, oleic acid and octadecene; and the active substance is one or the mixture of at least two of ferric oxide, ferric hydroxide and an iron source containing organic substance or inorganic substance capable of being thermally decomposed into ferric oxide or ferric hydroxide. The negative electrode material preparation method provided by the invention is simple in process and easy to implement, and facilitates improving the production efficiency and saving the production cost. The comprehensive performance of the negative electrode material is superior to that of the traditional commercial C material electrode. Therefore, the battery assembly by the electrode material prepared from Fe3C has high cycle stability and high rate performance, and the safety performance of the battery is significantly enhanced.

Description

technical field [0001] The technical field of lithium batteries of the present invention, in particular, relates to a slurry for preparing negative electrode materials and a method for preparing negative electrode materials. Background technique [0002] Lithium-ion batteries have been widely used in various portable electronic devices and electric vehicles due to their advantages of zero memory effect and low self-discharge. However, the electrochemical performance of batteries is often limited by the performance of electrodes. Therefore, looking for a high-performance New electrode materials with high cycle and high rate are the challenges we face. The current commercial battery anode material is carbon. Its limited energy density (372mAh g-1) and poor rate capability, thermal stability, and mechanical properties cannot meet people's increasing pursuit of high-capacity, high-performance batteries. Therefore, it is of great significance to develop new materials with high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/587H01M4/62H01M10/0525
CPCH01M4/366H01M4/587H01M4/625H01M10/0525Y02E60/10
Inventor 何伟东陈东江丁显波陈太宝袁博韬
Owner SHENZHEN LI S TECH CO LTD
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