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Layered Co3O4 lithium ion battery negative electrode material and preparation method thereof

A technology of lithium-ion batteries and negative electrode materials, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of low specific capacity of negative electrode materials, and achieve the effects of increasing transmission speed, increasing specific capacity, and enhancing magnification

Active Publication Date: 2022-01-07
广州发展新能源股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a layered Co 3 o 4 Lithium-ion battery negative electrode material and its preparation method, the material uses its own layered structure to speed up the transmission rate of lithium ions and increase the specific capacity, so as to solve the technical problem of low specific capacity of lithium battery negative electrode materials

Method used

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  • Layered Co3O4 lithium ion battery negative electrode material and preparation method thereof
  • Layered Co3O4 lithium ion battery negative electrode material and preparation method thereof
  • Layered Co3O4 lithium ion battery negative electrode material and preparation method thereof

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Embodiment 1

[0032] A layered Co 3 o 4 Lithium-ion battery anode materials, including layered Co that can be used to prepare lithium-ion battery anode materials 3 o 4 , layered Co 3 o 4 It is a layered stack structure, layered Co 3 o 4 After stacking, a rod-shaped profile is formed, which is specifically prepared by the following steps:

[0033] S1, Co(NO 3 ) 2 ·6H 2 O and CoCl3 ·6H 2 O is mixed in a molar ratio of 1:1, and then added to 60mL of the shape-directing agent to prepare a precursor solution. At this time, the concentration of the precursor solution is 0.33mol / L, wherein the shape-directing agent is Containing the mixed solution of ethylene glycol and 8.3wt% ammoniacal liquor;

[0034] S2. Stir the precursor solution for 1 hour, then transfer the fully reacted precursor solution to the reactor for solvothermal reaction, control the reaction temperature to 220°C, and control the heating time to 18 hours. The reactor was allowed to stand and cooled to room temperature ...

Embodiment 2

[0038] A layered Co 3 o 4 Lithium-ion battery anode materials, including layered Co that can be used to prepare lithium-ion battery anode materials 3 o 4 , layered Co 3 o 4 It is a layered stack structure, layered Co 3 o 4 After stacking, a rod-shaped profile is formed, which is specifically prepared by the following steps:

[0039] S1, Co(NO 3 ) 2 ·6H 2 O and CoCl 3 ·6H 2 O is mixed in a molar ratio of 1:1, and then added to 60mL of the shape-directing agent to prepare a precursor solution. At this time, the concentration of the precursor solution is 0.6mol / L, wherein the shape-directing agent is Containing the mixed solution of ethylene glycol and 10wt% ammoniacal liquor;

[0040] S2. Stir the precursor solution for 2 hours, then transfer the fully reacted precursor solution to the reactor for solvothermal reaction, control the reaction temperature to 180°C, and control the heating time to 24 hours. The reactor was allowed to stand and cooled to room temperature...

Embodiment 3

[0044] A layered Co 3 o 4 Lithium-ion battery anode materials, including layered Co that can be used to prepare lithium-ion battery anode materials 3 o 4 , layered Co 3 o 4 It is a layered stack structure, layered Co 3 o 4 After stacking, a rod-shaped profile is formed, which is specifically prepared by the following steps:

[0045] S1, Co(NO 3 ) 2 ·6H 2 O and CoCl 3 ·6H 2 O is mixed in a molar ratio of 1:1, and then added to 60mL of the shape-directing agent to prepare a precursor solution. At this time, the concentration of the precursor solution is 0.2mol / L, wherein the shape-directing agent is Contain the mixed solution of ethylene glycol and 5wt% ammoniacal liquor;

[0046] S2. Stir the precursor solution for 2 hours, then transfer the fully reacted precursor solution to the reactor for solvothermal reaction, control the reaction temperature to 250°C, and control the heating time to 12 hours. The reactor was allowed to stand and cooled to room temperature to ...

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Abstract

The invention discloses a layered Co3O4 lithium ion battery negative electrode material and a preparation method thereof, and relates to the field of batteries. The method comprises the following steps: S1, weighing Co(NO3)2.6 H2O and CoCl3.6H2O, and adding the Co(NO3)2.6H2O and CoCl3. 6H2O into a morphology guiding agent containing ammonia water and ethylene glycol to prepare a precursor solution; s2, stirring the precursor solution, and then performing solvothermal reaction to prepare a solid suspension; s3, filtering the solid suspension, retaining a solid-phase product, cleaning and drying the solid-phase product, and preparing a precursor beta-Co(OH)2; and S4, heating and calcining the precursor beta-Co(OH)2 in an air atmosphere to obtain the layered Co3O4. The layered Co3O4 with the rod-shaped outline is obtained, and the layered structure of the Co3O4 is beneficial to accelerating the transmission rate of lithium ions, providing a stable discharge platform, enhancing the multiplying power of the battery and improving the specific capacity of the material.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a layered Co 3 o 4 Lithium-ion battery negative electrode material and preparation method thereof. Background technique [0002] With the rapid increase of the world's population, the problem of energy shortage is becoming more and more serious. At present, the main energy storage devices include chemical power storage and mechanical energy storage. Mechanical energy storage has randomness and variability that are difficult to control. Compared with mechanical energy storage, Due to the high requirements of the environment, chemical energy storage has high energy density and power density, and is easy to carry. It mainly includes lithium-ion batteries, lead-acid batteries, and flow batteries, which are widely used in consumer electronics and electric vehicle industries. [0003] Compared with traditional secondary batteries, lithium-ion batteries have the advantages of high working vol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/04H01M4/36H01M4/52
CPCC01G51/04H01M4/366H01M4/52C01P2002/72C01P2004/03C01P2004/04C01P2006/40Y02E60/10
Inventor 李烁烁程威李华峰卢必娟顾鹏王栋
Owner 广州发展新能源股份有限公司
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