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Rod-like cobalt carbonate iron composite material and application thereof

A technology of cobalt iron carbonate and composite materials, which is applied in structural parts, final product manufacturing, electrochemical generators, etc., can solve problems such as product difficulties, and achieve the effects of simple and easy-to-control reactions, good crystallization, and uniform size

Inactive Publication Date: 2014-06-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is even more difficult to prepare solid solution material products with regular and special morphology.

Method used

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  • Rod-like cobalt carbonate iron composite material and application thereof
  • Rod-like cobalt carbonate iron composite material and application thereof
  • Rod-like cobalt carbonate iron composite material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Add ferrous ammonium sulfate and cobalt chloride at a molar ratio of 0.2:0.8 (ie x=0.2) into distilled water at 0.20mmol / 40mL and 0.80mmol / 40mL respectively, and stir until the solution is clear;

[0031] (2) Add sodium bicarbonate in an amount of 3.00mmol / 40mL to the above solution while stirring, and then continue stirring for 10min to obtain a cloudy solution;

[0032] (3) Add sodium pyrophosphate in an amount of 1.00mmol / 40mL to the solution described in step (2) while stirring, and continue stirring for 10 minutes;

[0033] (4) Transfer the solution prepared in step (3) to the reactor, seal it, put it in an oven at 100°C, and react for 9 hours;

[0034] (5) After the reaction is over, cool the reactor to room temperature;

[0035] (6) Discard the supernatant in the reaction kettle, rinse the product with water and ethanol for 3±1 times, and then dry it in an oven at 50°C for 5 hours. The powdery product obtained is the rod-shaped cobalt-iron carbonate composit...

Embodiment 2

[0040] (1) Add ferrous chloride and cobalt nitrate in a molar ratio of 0.4:0.6 (ie x=0.4) into distilled water at 0.40mmol / 40mL and 0.60mmol / 40mL respectively, and stir until the solution is clear;

[0041] (2) Add potassium carbonate in an amount of 2.00mmol / 40mL to the above solution while stirring, and then continue stirring for 15min to obtain a cloudy solution;

[0042] (3) Add diethanolamine in an amount of 2.00mmol / 40mL to the solution described in step (2) while stirring, and continue stirring for 15 minutes;

[0043] (4) Transfer the solution prepared in step (3) to the reactor, seal it, put it in an oven at 120°C, and react for 12 hours;

[0044] (5) After the reaction is over, cool the reactor to room temperature;

[0045] (6) Discard the supernatant in the reaction kettle, rinse the product with water and ethanol for 3±1 times, and then dry it in a 60°C oven for 6 hours. The powdery product obtained is the rod-shaped cobalt-iron carbonate composite material Fe 0....

Embodiment 3

[0050] (1) Add ferrous sulfate and cobalt sulfate at a molar ratio of 0.6:0.4 (ie x=0.6) to distilled water in amounts of 1.20mmol / 40mL and 0.80mmol / 40mL respectively, and stir until the solution is clear;

[0051] (2) Add ammonium carbonate in an amount of 3.00mmol / 40mL to the above solution while stirring, and then continue stirring for 20min to obtain a cloudy solution;

[0052] (3) Add diethanolamine in an amount of 3.00mmol / 40mL to the solution described in step (2) while stirring, and continue stirring for 15 minutes;

[0053] (4) Transfer the solution prepared in step (3) to the reactor, seal it, put it in an oven at 140°C, and react for 14 hours;

[0054] (5) After the reaction is over, cool the reactor to room temperature;

[0055] (6) Discard the supernatant in the reaction kettle, rinse the product with water and ethanol for 3±1 times, and then dry it in an oven at 70°C for 7 hours. The powdery product obtained is the rod-shaped cobalt-iron carbonate composite mate...

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Abstract

The invention discloses a rod-like cobalt carbonate iron composite material. The molecular formula of the material is Fe(x)Co(1-x)CO(3), wherein x is smaller than 1 and greater than 0, the appearance of the material is in a rod shape, the width of the material is 2.5+ / -0.5 microns, and the length is regulated and controlled by the value of x. The rod-like cobalt carbonate iron composite material is prepared by the following steps: dissolving iron salt and a cobalt salt in water according to a certain ratio; adding a certain amount of carbonate and a certain quantity of a metal ion complexing agent, sealing in a reaction kettle, and reacting for a certain period of time at certain temperature; cleaning and drying to obtain the rod-like cobalt carbonate iron composite material. The invention also discloses application of the rod-like cobalt carbonate iron composite material in preparation of a lithium ion battery negative electrode material for the first time. The rod-like cobalt carbonate iron composite material disclosed by the invention has the specific capacity of 1,000mAh / g shown by tests, is 2-3 times of commercial anode graphite in capacity, and plays an important guiding role in development of a novel lithium ion battery.

Description

technical field [0001] The invention relates to a rod-shaped cobalt-iron carbonate composite material and an application thereof, and belongs to the technical field of nanometer materials and lithium ion battery electrode materials. Background technique [0002] Ferrous carbonate and cobalt carbonate are important industrial salts, which are widely used in production and daily life, and their preparation has always attracted much attention. Ferrous carbonate is an important raw material for steelmaking and preparation of other iron salts or iron oxides, and is also widely used in blood-enriching drugs. Cobalt carbonate is an important raw material for the production of other cobalt compounds, and it is also used as a colorant in the ceramic industry, and in the organic industry to make catalysts, camouflage paints, etc. [0003] With the development of human science and technology, the use of green energy to replace fossil fuels is considered to be one of the important meas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/1397H01M10/058
CPCH01M4/136H01M4/362H01M4/58H01M10/0525H01M2004/027Y02E60/10Y02P70/50
Inventor 沈强赵世强冯凡魏珊珊王欣欣
Owner SHANDONG UNIV
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