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Preparation method, product and application of tricobalt tetroxide loaded on carbon nanosheet electrode material

A technology of cobalt tetraoxide and carbon nanosheets, which is applied in the field of lithium-ion batteries, can solve the problems of volume expansion and poor conductivity, achieve stable properties, high conductivity, and solve the effects of poor conductivity and volume expansion

Active Publication Date: 2021-07-20
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of poor conductivity and volume expansion of cobalt tetroxide electrode material, the purpose of the present invention is to provide a preparation method of cobalt tetroxide loaded on carbon nanosheet electrode material

Method used

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  • Preparation method, product and application of tricobalt tetroxide loaded on carbon nanosheet electrode material
  • Preparation method, product and application of tricobalt tetroxide loaded on carbon nanosheet electrode material

Examples

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Embodiment 1

[0029] A preparation method of tricobalt tetroxide loaded on carbon nanosheet electrode material, comprising the steps of:

[0030] (1) Dissolve the cobalt salt in a saturated sodium sulfate solution, stir for 10 minutes at a stirring speed of 500 r / min, and name the solution A, where the concentration of sodium sulfate is 0.05 mol / L;

[0031] (2) Dissolve sodium oleate in saturated sodium sulfate solution, stir for 10 minutes at a stirring speed of 500 r / min, and name the solution B, where the concentration of sodium oleate is 0.05 mol / L;

[0032] (3) Under the conditions of 80°C water bath and a stirring speed of 500r / min, drop solution A into solution B at a rate of 1 drop / s, and keep stirring until the water in the solution is evaporated, and finally oleic acid will be obtained Cobalt precipitation and precipitated sodium sulfate;

[0033] (4) Vacuum-dry the obtained product at 80°C to obtain cobalt oleate precursor;

[0034] (5) By insulating cobalt oleate from the air ...

Embodiment 2

[0037] A preparation method of tricobalt tetroxide loaded on carbon nanosheet electrode material, comprising the steps of:

[0038] (1) Dissolve the cobalt salt in a saturated sodium sulfate solution, stir for 20 minutes at a stirring speed of 600 r / min, and name the solution A, where the concentration of sodium sulfate is 1 mol / L;

[0039] (2) Dissolve sodium oleate in saturated sodium sulfate solution, stir for 20 minutes at a stirring speed of 600 r / min, and name the solution B, where the concentration of sodium oleate is 1 mol / L;

[0040] (3) Under the conditions of 80°C water bath and a stirring speed of 600 r / min, drop solution A into solution B at a rate of 2 drops / s, and keep stirring until the water in the solution is evaporated, and finally oil will be obtained acid cobalt precipitation and precipitated sodium sulfate;

[0041] (4) Vacuum-dry the obtained product at 80°C to obtain cobalt oleate precursor;

[0042] (5) By separating the cobalt oleate from the air unde...

Embodiment 3

[0045] A preparation method of tricobalt tetroxide loaded on carbon nanosheet electrode material, comprising the steps of:

[0046] (1) Dissolve the cobalt salt in a saturated sodium sulfate solution, stir for 15 minutes at a stirring speed of 500 r / min, and name the solution A, where the concentration of sodium sulfate is 1 mol / L;

[0047] (2) Dissolve sodium oleate in saturated sodium sulfate solution, stir for 15 minutes at a stirring speed of 500 r / min, and name the solution B, where the concentration of sodium oleate is 1.5 mol / L;

[0048] (3) Under the conditions of 80°C water bath and a stirring speed of 600 r / min, drop solution A into solution B at a rate of 2 drops / s, and keep stirring until the water in the solution is evaporated, and finally oil will be obtained acid cobalt precipitation and precipitated sodium sulfate;

[0049] (4) Vacuum-dry the obtained product at 80°C to obtain cobalt oleate precursor;

[0050] (5) By separating the cobalt oleate from the air ...

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Abstract

The invention discloses a method for preparing cobalt tetroxide loaded on carbon nanosheet electrode materials and its products and applications. Cobalt tetroxide is loaded on the surface of nanosheets in a one-step method, and at the same time, the content of carbon is more than 30%. First, the cobalt salt is dissolved Obtain A in a saturated sodium sulfate solution, dissolve sodium oleate in a saturated sodium sulfate solution to obtain B, add solution A to solution B dropwise, and dry the precursor after the water in the solution evaporates. Then, under nitrogen atmosphere, calcining can obtain black tricobalt tetraoxide nanoparticles supported on carbon nanosheets. The product has high stability and stable properties. It not only has a high specific capacity of cobalt tetroxide, but also has high conductivity of carbon and eases volume expansion, making the material have excellent cycle stability. The preparation method has the advantages of simple operation, low raw material cost, low reaction temperature and excellent electrochemical properties, and can be widely used in the fields of catalysis, sensing, energy storage and the like.

Description

technical field [0001] The present invention relates to a preparation method of an electrode material loaded with tricobalt tetroxide loaded on carbon nanosheets and its product and application, in particular to the preparation of a novel electrode material loaded with tricobalt tetroxide loaded on carbon nanosheets with excellent discharge specific capacity, cycle performance and coulombic efficiency The method and its products and applications belong to the technical field of lithium ion batteries. Background technique [0002] Although the economy develops, people's demand for energy is increasing. At the same time, the problems of environmental degradation and energy shortage have become increasingly prominent. Although lead-acid batteries and nickel-metal hydride batteries alleviate the energy shortage to a certain extent, due to their own problems such as unfriendly environment and poor electrochemical performance, they are doomed not to become the main choice on the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/583H01M4/62H01M4/525H01M10/0525C01G51/04C01B32/15B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G51/04C01P2004/80C01B32/15H01M4/362H01M4/525H01M4/583H01M4/625H01M10/0525Y02E60/10
Inventor 何丹农林琳王敬锋周移金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH