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A kind of composite spinel material and its preparation method and application

A technology of spinel and reaction, applied in the field of preparation of spinel materials, can solve the problems of high energy consumption and complexity, and achieve the effects of uniform particle size distribution, good magnification, and low energy consumption

Inactive Publication Date: 2018-03-09
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are relatively complicated to operate and consume high energy consumption.

Method used

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  • A kind of composite spinel material and its preparation method and application
  • A kind of composite spinel material and its preparation method and application
  • A kind of composite spinel material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of composite spinel material:

[0024] 1) First weigh 0.400g of manganese sulfate, 0.210g of nickel sulfate and 0.223g of cobalt sulfate into the lining of the reactor, add 12mL of water, stir to dissolve the medicine, add 1.0g of urea, stir to dissolve, add 2.2moL / L Lithium hydroxide 58mL, then add 1.2g ammonium persulfate to react, stir for one minute (be careful not to stir for too long, otherwise there will be heterogeneous phase formation);

[0025] 2) Finally, cover the lining of the reactor and put it into the reactor, and put it in an oven at 190°C for 20 hours;

[0026] 3) The samples were obtained after centrifugal washing and drying, and the obtained samples were annealed at 700°C for 8 hours;

[0027] Lithium battery assembly: According to the mass ratio of lithium-rich: carbon black: polyvinylidene fluoride = 80:12:8, after mixing and grinding, apply evenly on 0.25 cm 2 The aluminum sheet is used as the positive electrode, the negativ...

Embodiment 2

[0034] A preparation method of composite spinel material:

[0035] 1) First weigh 0.338g of manganese sulfate, 0.175g of nickel sulfate, and 0.187g of cobalt sulfate into the lining of the reaction kettle, add 10mL of water, stir to dissolve the medicine, add 1.5g of urea, stir to dissolve, add 2moL / L Lithium hydroxide 60mL, then add 1g ammonium persulfate to react, stir for one minute (be careful not to stir for too long, otherwise there will be heterogeneous phase formation);

[0036] 2) Finally, cover the lining of the reactor and put it into the reactor, and put it in an oven at 180°C for 12 hours;

[0037] 3) The samples were obtained after centrifugal washing and drying, and the obtained samples were annealed at 600°C for 12 hours.

Embodiment 3

[0039] A preparation method of composite spinel material:

[0040] 1) First weigh 0.507g of manganese sulfate, 0.263g of nickel sulfate, and 0.281g of cobalt sulfate into the lining of the reaction kettle, add 15mL of water, stir to dissolve the medicine, add 1.5g of urea, stir to dissolve, add 2.5mol / L Lithium hydroxide 55mL, then add 1.5g ammonium persulfate to react, stir for one minute (be careful not to stir for too long, otherwise there will be heterogeneous phase formation);

[0041] 2) Finally, cover the lining of the reactor and put it into the reactor, and put it in an oven at 200°C for 30 hours;

[0042] 3) The samples were obtained after centrifugal washing and drying, and the obtained samples were annealed at 800°C for 6 hours.

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Abstract

The invention belongs to the field of preparing of spinel materials, and discloses a composite spinel material, a preparing method thereof and an application thereof. The chemical formula of the spinel material is Li2Co0.6Ni0.4Mn3O8. The preparing method of the spinel material includes the following steps that 1, manganese sulfate, nickel sulfate and cobaltous sulfate are put into a reaction kettle lining, water is added, and the mixture is stirred to enable the raw materials to be dissolved; then urea is added, the mixture is stirred and dissolved, lithium hydroxide is further added, ammonium persulfate is finally added to carry out a reaction, and the mixture is stirred for 1 min; 2, then the reaction kettle lining is sealed to be placed into a reaction kettle and placed into a dryer, and a reaction is carried out for 12 hours to 30 hours at the temperature ranging from 180 DEG C to 200 DEG C; 3, the mixture is centrifugally washed and dried, then a sample is obtained, and the obtained sample is annealed for 6 hours to 12 hours at the temperature ranging from 600 DEG C to 800 DEG C, and the composite spinel material is prepared. When the spinel material serves as a lithium ion battery anode material, quite excellent cycling stability and the good rate are achieved.

Description

technical field [0001] The invention belongs to the field of preparation of spinel materials, and discloses a composite spinel material and its preparation method and application. Background technique [0002] Lithium-ion batteries are widely used in mobile phones, notebook computers, electric vehicles and other fields due to their advantages such as high energy density, small self-discharge, high working voltage, good cycle performance, and environmental friendliness. With the expansion of the application field of lithium-ion batteries, new requirements are put forward for the cathode materials of lithium-ion batteries. Since the research found that certain elements (such as Co, Ni, Cr, Cu, Fe) have a strong effect on spinel LiMn 2 o 4 Partial replacement of the Mn element in Mn will form a series of electrode materials with a higher potential platform spinel phase, so high-voltage positive electrode materials have attracted people's attention and are expected to become t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/1391H01M4/505H01M4/525H01M4/131H01M10/0525
CPCH01M4/131H01M4/1391H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 洪振生谢超兵曾悦峰
Owner FUJIAN NORMAL UNIV