Porous layered CoFe2O4/C nano composite material and preparation method thereof

A nano-composite material, cofe2o4 technology, applied in the direction of electrical components, electrochemical generators, battery electrodes, etc., can solve the problems of lithium-ion battery capacity decline, affecting battery cycle performance, and damage to material integrity, so as to facilitate scale production, reduce volume expansion, and reduce the effect of production energy consumption

Pending Publication Date: 2021-04-16
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The repeated changes in the volume of the active material during the charge and discharge process will seriously damage the integrity of the material, and will cause the active material to be crushed and fall off from the current collector, which will cause a rapid decline in the capacity of the lithium-ion battery and affect the cycle performance of the battery.
Therefore, transition metal oxides cannot be directly used as anode materials, and further optimization is still needed

Method used

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  • Porous layered CoFe2O4/C nano composite material and preparation method thereof
  • Porous layered CoFe2O4/C nano composite material and preparation method thereof
  • Porous layered CoFe2O4/C nano composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A porous layered CoFe 2 o 4 The preparation method of / C nanocomposite material, comprises the following steps:

[0032] Step 1: Dissolve 0.4g of ferric chloride hexahydrate, 0.18g of cobalt chloride hexahydrate and 0.5g of hexamethyltetramine in 20ml of ethylene glycol, stir magnetically for 30 minutes to fully dissolve, and configure A solution;

[0033] Step 2: Dissolve 0.5g of sodium citrate in 20ml of ethylene glycol and magnetically stir in a water bath at 60°C for 30 minutes to fully dissolve it and configure it into solution B;

[0034] Step 3: Slowly pour solution B into solution A and continue magnetic stirring for 30 minutes to obtain mixed solution C;

[0035] Step 4, transfer the mixed solution C to an 80ml reaction kettle, set the temperature of the incubator at 160°C to keep the reaction for 6h, wash thoroughly with water and ethanol, and then obtain the initial product of the reaction by a one-pot method;

[0036] Step 5, transfer the initial product...

Embodiment 2

[0038] A porous layered CoFe 2 o 4 The preparation method of / C nanocomposite material, comprises the following steps:

[0039] Step 1: Dissolve 0.4g of ferric chloride hexahydrate, 0.18g of cobalt chloride hexahydrate and 1g of hexamethyltetramine in 20ml of ethylene glycol, stir magnetically for 30min to fully dissolve, and prepare solution A ;

[0040] Step 2: Dissolve 0.5g of sodium citrate in 20ml of ethylene glycol and magnetically stir in a water bath at 60°C for 30 minutes to fully dissolve it and configure it into solution B;

[0041] Step 3: Slowly pour solution B into solution A and continue magnetic stirring for 30 minutes to obtain mixed solution C;

[0042] Step 4, transfer the mixed solution C to an 80ml reaction kettle, set the temperature of the incubator at 160°C to keep the reaction for 6h, wash thoroughly with water and ethanol, and then obtain the initial product of the reaction by a one-pot method;

[0043] Step 5, transfer the initial product of the ...

Embodiment 3

[0045] A porous layered CoFe 2 o 4 The preparation method of / C nanocomposite material, comprises the following steps:

[0046] Step 1: Dissolve 0.2g of ferric chloride hexahydrate, 0.09g of cobalt chloride hexahydrate and 1g of hexamethyltetramine in 20ml of ethylene glycol, stir magnetically for 30 minutes to fully dissolve, and prepare solution A ;

[0047] Step 2: Dissolve 0.5g of sodium citrate in 20ml of ethylene glycol and magnetically stir in a water bath at 60°C for 30 minutes to fully dissolve it and configure it into solution B;

[0048] Step 3: Slowly pour solution B into solution A and continue magnetic stirring for 30 minutes to obtain mixed solution C;

[0049] Step 4, transfer the mixed solution C to an 80ml reaction kettle, set the temperature of the incubator at 160°C to keep the reaction for 6h, wash thoroughly with water and ethanol, and then obtain the initial product of the reaction by a one-pot method;

[0050] Step 5, transfer the initial product of...

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Abstract

The invention relates to a preparation method of a porous layered CoFe2O4/C nano composite material, and the method comprises the following steps: by using ferric trichloride hexahydrate and cobalt chloride hexahydrate as an iron source and a cobalt source, hexamethylenetetramine as a carbon source, ethylene glycol as a solvent and sodium citrate as a complexing agent, preparing the porous layered CoFe2O4/C nano composite material by a one-pot method, wherein the porous layered CoFe2O4/C nano composite material has a porous structure. Moreover, the method directly realizes the compounding of the transition metal oxide and the carbon material, and is beneficial to the inhibition of the volume expansion problem in the charging and discharging process as an improved lithium battery negative electrode material.

Description

technical field [0001] The invention relates to the field of preparation of energy nanomaterials, more specifically, to a porous layered CoFe 2 o 4 / C nanocomposite preparation method. Background technique [0002] Transition metal oxide anode material CoFe 2 o 4 , MgFe 2 o 4 , Fe 3 o 4 It has the advantages of high theoretical specific capacity, low raw material price, and environmental friendliness, so it has great potential in energy storage applications. Transition metal oxides have a different lithium-deintercalation mechanism from commercial graphite electrodes. The storage and release of electrical energy is carried out through a reversible redox reaction with elemental lithium. During the conversion reaction, a highly active electrochemically active Li2O and nano metal particles ensure that the reversible reaction can continue. The conversion reaction equation is as follows: [0003] [0004] From the principle of the transformation reaction mechanism, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525H01M4/62H01M10/0525
CPCY02E60/10
Inventor 陈冠政程琳彭艳来刘田徐皓莹周艳平钱矜辰
Owner ZHEJIANG SCI-TECH UNIV
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