Preparation method of fusiform iron oxide single crystal nano material

A technology of single-crystal nanometer and iron oxide, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of cumbersome preparation methods, slow electron transfer speed, poor electrical conductivity, etc., and achieve large capacity And cycle performance, reduce the dissipation of electrons, reduce the effect of production cost

Inactive Publication Date: 2020-05-22
HENAN UNIV OF URBAN CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, commercial lithium-ion batteries mainly use carbon-based materials as negative electrodes, but the reversible capacity of graphite negative electrode materials is only 372mAh / g, which seriously limits the development of lithium-ion batteries in the future. Electrode materials with excellent capacity and cycle performance to prepare lithium-ion batteries
Fe 2 o 3 As a negative electrode material for lithium-ion batteries, it has a theoretical capacity of up to 1007mAh / g, but Fe 2 o 3 Poor electrical conductivity, slow electron transfer, and volume expansion during cycling, ultimately leading to unsatisfactory battery rate performance and cycle performance; in addition, the existing Fe 2 o 3 Preparation method is loaded down with trivial details, is unfavorable for industrialized production
CN102528027B report adopts ferric perchlorate, sodium dihydrogen phosphate and urea to prepare spindle-shaped α-Fe 2 o 3 Particles, this method needs to add urea to adjust pH, and ferric perchlorate is a strong oxidant, which is not conducive to large-scale production

Method used

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  • Preparation method of fusiform iron oxide single crystal nano material
  • Preparation method of fusiform iron oxide single crystal nano material
  • Preparation method of fusiform iron oxide single crystal nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) 50mL 0.2mol / L FeCl 3 ·6H 2 O and 10mL of 0.01mol / L NaH 2 PO 4 well mixed;

[0029] (2) hydrothermally reacting the mixed solution obtained in step (1) at 80° C. for 72 hours;

[0030] (3) Filtering the reacted sample in step (2), putting the obtained precipitate into a vacuum drying chamber at 80° C. to dry to obtain a fusiform iron oxide single crystal nanomaterial;

[0031] Carry out X-ray diffraction and scanning electron microscope to the ferric oxide material obtained in the embodiment, by figure 1 As can be seen, the material that the present invention obtains is ferric oxide material; By figure 2 It can be seen that the ferric oxide material is a shuttle-shaped nanometer material, and the ferric oxide material prepared by this method has high purity and no other impurities; image 3 It shows that the ferric oxide material obtained in this example has a single crystal structure.

[0032] Assembling and performance testing of lithium-ion batteries: mix ...

Embodiment 2

[0034] (1) 100mL 0.5mol / L FeCl 3 ·6H 2 O and 2mL of 0.05mol / L NaH 2 PO 4 well mixed;

[0035] (2) hydrothermally reacting the mixed solution obtained in step (1) at 120° C. for 24 hours;

[0036] (3) Filtering the reacted sample in step (2), putting the obtained precipitate into a vacuum drying chamber at 80° C. to dry to obtain a fusiform iron oxide single crystal nanomaterial;

[0037] The assembly and performance test of the lithium-ion battery are the same as in Example 1, and the stable discharge capacity is shown in Table 1.

Embodiment 3

[0039] (1) 60mL 0.4mol / L FeCl 3 ·6H 2 O and 5mL of 0.04mol / L NaH 2 PO 4 well mixed;

[0040] (2) hydrothermally reacting the mixed solution obtained in step (1) at 120° C. for 24 hours;

[0041] (3) Filtering the reacted sample in step (2), putting the obtained precipitate into a vacuum drying chamber at 80° C. to dry to obtain a fusiform iron oxide single crystal nanomaterial;

[0042] The assembly and performance test of the lithium-ion battery are the same as in Example 1, and the stable discharge capacity is shown in Table 1.

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Abstract

The invention relates to the technical field of new energy materials, in particular to a preparation method of a fusiform iron oxide single crystal nano material. The method comprises the following steps: mixing an iron salt solution with a NaH2PO4 solution to obtain a mixed solution; carrying out hydrothermal reaction on the obtained mixed solution; performing centrifugal separation of the obtained product, and obtaining a fusiform iron oxide single crystal nano material after drying. The monodisperse fusiform iron oxide nano single crystals can be prepared in batches by adopting a simple method, and the material has a single crystal structure, is suitable for electron transmission, reduces electron dissipation in the transmission process, can be prepared in batches, and is high in yieldand stable in material finished product.

Description

technical field [0001] The invention relates to the technical field of new energy materials, in particular to a method for preparing a shuttle-shaped iron oxide single crystal nanomaterial. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high open circuit voltage, long cycle life, and good safety. They are widely used in portable electronic devices, such as mobile phones and notebook computers. They are also the preferred power source for electric vehicles in the future. They have broad application space and economical value. [0003] At present, the focus of lithium-ion battery research is on the positive and negative electrode materials of the battery, and the negative electrode material is one of the key materials of the lithium-ion battery. At present, commercial lithium-ion batteries mainly use carbon-based materials as negative electrodes, but the reversible capacity of graphite negative electrode materials is only 372mA...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/525H01M10/0525Y02E60/10
Inventor 杨亦龙党丽赟毛艳丽陈乐乐李山鹰刘向云苏箐
Owner HENAN UNIV OF URBAN CONSTR
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