Carbon-based compounded ferric cyanamide material and preparation method thereof

A composite ferric cyanamide and carbon-based technology, which is applied in the direction of electrochemical generators, electrical components, battery electrodes, etc., can solve the problems of difficult to obtain composite structures, harsh synthesis and preparation conditions, and limited application of materials, so as to increase the magnification and cycle performance, reduce production cost, and solve the effect of volume expansion

Active Publication Date: 2018-07-24
MONALISA GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Iron cyanamide (FeCN 2 ) is a negative electrode material for sodium-ion batteries with high charge-discharge capacity potential. However, due to the extremely harsh synthesis and preparation conditions, it is difficult to obtain the material directly, and it is even more difficult to obtain the composite structure of the material, which significantly limits the material. Applications

Method used

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  • Carbon-based compounded ferric cyanamide material and preparation method thereof
  • Carbon-based compounded ferric cyanamide material and preparation method thereof
  • Carbon-based compounded ferric cyanamide material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0047] 1) Fully grind the analytically pure ferric ammonium oxalate and urea in a glass mortar to form a mixture A, wherein 1.5 g of ferric ammonium oxalate and 1.5 g of urea;

[0048] 2) Transfer A from the mortar to a quartz crucible, place the quartz crucible in a tube furnace, and raise the temperature to 150°C at a rate of 20°C / min under an argon atmosphere, and keep it warm for 1h, and then continue to heat up for 3 The heating rate of °C / min was continued to raise the temperature to 570 °C, and the temperature was kept for 1 h, and the obtained product was marked as B.

[0049] Adopt Japanese science D / max2000PCX-ray diffractometer to analyze product B, the XRD of gained product sees figure 1 . from figure 1 It can be seen that the product is a pure phase of FeCN 2 Structure, good crystallinity. Product B was observed under a scanning electron microscope and a transmission electron microscope, from Figure 2a and Figure 2b It can be seen that the product presents...

Embodiment 2

[0052] 1) Fully grind analytically pure ferric nitrate and melamine in a glass mortar to form mixture A, wherein 1 g of ferric nitrate and 1.67 g of melamine;

[0053] 2) Transfer A from the mortar to a quartz crucible, place the quartz crucible in a tube furnace, and raise the temperature to 160 °C at a rate of 30 °C / min under an argon atmosphere, keep it warm for 5 min, and then continue to heat it up for 5 min. The heating rate of °C / min was continued to raise the temperature to 600 °C, and the temperature was kept for 30 min, and the obtained product was marked as B.

[0054] Adopt Japanese science D / max2000PCX-ray diffractometer to analyze product B, the XRD of gained product sees image 3 . from image 3 It can be seen that the product is still pure phase FeCN 2 structure, but the crystallinity is weak, which may be related to the small particle size and the presence of a coating structure. The product B was observed under a scanning electron microscope and a transmi...

Embodiment 3

[0056] 1) Fully grind analytically pure ferrous oxalate and cyanamide in a glass mortar to form a mixture A, wherein 2 g of ferric nitrate and 0.4 g of cyanamide;

[0057] 2) Transfer A from the mortar to a quartz crucible, place the quartz crucible in a tube furnace, and raise the temperature to 160 °C at a rate of 30 °C / min under an argon atmosphere, keep it warm for 5 min, and then continue to heat it for 30 °C The heating rate of °C / min was continued to raise the temperature to 850 °C, and the temperature was kept for 1 min, and the obtained product was marked as B.

[0058] Adopt Japanese science D / max2000PCX-ray diffractometer to analyze product B, the XRD of gained product sees Figure 5a . from Figure 5a It can be seen that the product is still pure phase FeCN 2 Structure, good crystallinity, high purity. The product B was observed under a scanning electron microscope, from Figure 5b and Figure 5c It can be seen that the product presents a stacked polyhedral s...

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Abstract

The invention relates to a carbon-based compounded ferric cyanamide material and a preparation method thereof. The carbon-based compounded ferric cyanamide material comprises ferric cyanamide and carbon compounded with the ferric cyanamide. According to the material, the ferric cyanamide is compounded with the carbon, so that the problem that the volume of ferric cyanamide is increased can be effectively solved, meanwhile due to compounding of the two materials, the reaction activity of a battery can be further improved, the battery can be relatively stable in structure, and the multiplying power and the circulation performance of the battery can be improved.

Description

technical field [0001] The invention belongs to the field of composite material synthesis, and in particular relates to a novel carbon-based composite iron cyanamide material and a preparation method thereof. Background technique [0002] Due to the advantages of high energy density, long service life, and environmental friendliness, lithium-ion batteries have become a research hotspot in recent years and have been successfully commercialized. However, the reserves of lithium resources in the earth are relatively low, and the high price has become a bottleneck for the continued development of lithium-ion batteries. Therefore, it is urgent to find an element with abundant reserves and similar properties to replace lithium. Sodium and lithium are elements of the same main group, and sodium reserves are relatively high on the earth and widely distributed. Therefore, a large number of scientific researchers have invested a lot of energy in the research of sodium-ion batteries ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/60H01M4/62H01M10/054
CPCH01M4/366H01M4/60H01M4/625H01M10/054Y02E60/10
Inventor 刘一军李嘉胤黄剑锋潘利敏黄玲艳汪庆刚
Owner MONALISA GRP CO LTD
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