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Preparation method of hydroxyl iron phosphate-based battery material with novel morphology

A technology based on iron hydroxyphosphate and battery materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor electrochemical stability, uneven size distribution, and uncontrollable crystal morphology of materials, and achieve low cost, No agglomeration phenomenon, the effect of uniform size

Inactive Publication Date: 2017-01-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the solid phase method has simple process and low cost, the electrochemical stability of the prepared material is poor, the crystal morphology is uncontrollable, and the size distribution is not uniform.
Other methods are complex and costly

Method used

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  • Preparation method of hydroxyl iron phosphate-based battery material with novel morphology
  • Preparation method of hydroxyl iron phosphate-based battery material with novel morphology
  • Preparation method of hydroxyl iron phosphate-based battery material with novel morphology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this example, FeCl3·6H2O and Na3PO4·12H2O are used as raw materials, and the molar ratio of Fe:P is 1:1 for batching, and the hydrothermal method is used to prepare ferric hydroxyphosphate. The details are as follows: Weigh 5.406g of FeCl3·6H2O and dissolve it in a small amount of deionized water, then add 7.602g of Na3PO4·12H2O, after stirring continuously for 20 minutes, add an appropriate amount of deionized water to make the volume of the entire solution 100ml. The prepared solution was transferred to a polytetrafluoroethylene liner, and heated at 140° C. for 24 hours. Then it was centrifuged, washed and dried at 80°C for 2h. The product obtained after drying was redissolved in 100ml of 1mol / L hydrochloric acid solution, stirred continuously for 30 minutes, centrifuged, washed and dried again to obtain the final product iron trihydroxyphosphate.

[0028] The morphology of the prepared ferric trihydroxyphosphate is as follows figure 1 As shown in the figure, we ...

Embodiment 2

[0030] In this example, FeCl3·6H2O and Na3PO4·12H2O were used as raw materials, and the molar ratio of Fe:P was 1:1 for batching, and hydrothermal method was used to prepare ferric hydroxyphosphate. The details are as follows: Weigh 5.406g of FeCl3·6H2O and dissolve it in a small amount of deionized water, then add 7.602g of Na3PO4·12H2O, after stirring continuously for 20 minutes, add an appropriate amount of deionized water to make the volume of the entire solution 100ml. The prepared solution was transferred to a polytetrafluoroethylene liner, and heated at 180° C. for 24 hours. Then it was centrifuged, washed and dried at 80°C for 2h. The product obtained after drying was redissolved in 100ml of 1mol / L hydrochloric acid solution, stirred continuously for 30 minutes, centrifuged, washed and dried again to obtain the final product iron trihydroxyphosphate.

[0031] The morphology of the prepared ferric trihydroxyphosphate is as follows image 3 As shown, we can observe fro...

Embodiment 3

[0033] In this example, FeCl3·6H2O and Na3PO4·12H2O are used as raw materials, and the molar ratio of Fe:P is 1:0.85--1.15 for batching, and the hydrothermal method is used to prepare ferric hydroxyphosphate. The details are as follows: Weigh four parts of 5.406g of FeCl3·6H2O and dissolve them in a small amount of deionized water respectively, then add 6.462g, 7.222g, 7.983g, and 8.743g of Na3PO4·12H2O respectively, and after stirring continuously for 20 minutes, add an appropriate amount of deionized water Ionized water, so that the total solution volume is 100ml. The prepared solution was transferred to a polytetrafluoroethylene liner, and heated at 140° C. for 24 hours. Then it was centrifuged, washed and dried at 80°C for 2h. The product obtained after drying was redissolved in 100 ml of 1 mol / L hydrochloric acid solution, stirred continuously for 30 min, centrifuged, washed and dried again to obtain the final product.

[0034] The morphology of the prepared ferric hydr...

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Abstract

The invention discloses a preparation method of a hydroxyl iron phosphate-based battery material with novel morphology. The preparation method comprises the following steps of dissolving soluble iron salt in water, stirring and dispersing to prepare a 0.1-0.3 M solution, adding trisodium phosphate according to a mole ratio of soluble iron salt to trisodium phosphate as 1:(0.8-1.2), continuously stirring for 10-30 min, adding to-be-doped salt according to the mass ratio of trisodium phosphate to the to-be-doped salt as 1:(0.004-0.02), continuously stirring for 5 min, transferring an obtained mixed solution to a 100 ml reaction kettle, placing in an oven, performing reaction at 140-180 DEG C for 18-36 h, performing suction filtration after the reaction finishes, and putting in the oven at 80-100 DEG C for drying treatment for 4-10 h to form the material. According to the method, the large-scale hydroxyl iron phosphate material with the standardized morphology, good dispersity and uniform dimension is prepared by a simple hydrothermal method.

Description

technical field [0001] The invention relates to the field of battery material preparation, in particular to a method for preparing a novel morphology iron hydroxyphosphate-based battery material. Background technique [0002] At present, with the decreasing reserves of the three main energy sources of coal, oil and natural gas, and the deteriorating environmental pollution and global warming caused by them, the development of clean and renewable resources, such as solar energy, wind energy, tidal energy, etc. attracted the attention of many scholars. However, the role of these renewable energies is discontinuous. If you want to use these renewable energies on a large scale, you must have matching energy storage equipment. [0003] Lithium-ion batteries are more and more used in mobile phones, laptops, digital cameras, electric Automotive, aerospace, military equipment and many other fields. The lithium iron phosphate material with an olivine structure has the characterist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M10/0525
CPCH01M4/5825H01M10/0525Y02E60/10
Inventor 耿旺昌赵佳伟何小伟顾军渭张秋禹
Owner NORTHWESTERN POLYTECHNICAL UNIV
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