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Preparation methods of antimony trioxide and antimony trioxide composite material and applications of antimony trioxide and antimony trioxide composite material in sodium-ion batteries

An antimony trioxide and composite material technology, applied in battery electrodes, non-aqueous electrolyte batteries, circuits, etc., can solve the problems of capacity decay, cracking and pulverization of negative electrode materials, and falling off, and achieve high specific capacity, ease volume expansion, low-cost effects

Active Publication Date: 2014-07-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a drastic volume expansion will lead to cracking and pulverization of the negative electrode material, falling off from the current collector and failing, resulting in a large capacity fading

Method used

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  • Preparation methods of antimony trioxide and antimony trioxide composite material and applications of antimony trioxide and antimony trioxide composite material in sodium-ion batteries
  • Preparation methods of antimony trioxide and antimony trioxide composite material and applications of antimony trioxide and antimony trioxide composite material in sodium-ion batteries
  • Preparation methods of antimony trioxide and antimony trioxide composite material and applications of antimony trioxide and antimony trioxide composite material in sodium-ion batteries

Examples

Experimental program
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Effect test

Embodiment 1

[0028] In this example, electrostatic spray deposition is used to prepare antimony trioxide sodium ion battery negative electrode material, and the specific steps are:

[0029] Dissolve antimony acetate in a mixed solvent of ethanol / ethylene glycol (4:1 by volume) to form a precursor solution with a concentration of 0.01 mol / L, and flow the precursor solution to the spray needle at a constant speed of 3ml / h to adjust the spray The distance from the needle to the substrate is 4 cm. Under the action of an electrostatic field of 7 kV, the precursor solution forms a stable and uniform aerosol spray, which is deposited on a stainless steel substrate with a heating temperature of 160 °C. The deposition time is controlled to be 240 min, and three antimony oxide film.

[0030] The above-mentioned antimony trioxide film, that is, the negative electrode material of the sodium ion battery, is prepared into a sodium ion battery. The antimony trioxide thin film can be directly used as a n...

Embodiment 2

[0032] In this embodiment, a ball milling method is used to prepare antimony trioxide / carbon composite material, and the specific steps are:

[0033] The antimony trioxide powder and Super P (mass ratio: 7:3) were ball milled and mixed in an argon-filled ball mill tank at 500 rpm for 6 hours to obtain a carbon-coated antimony trioxide / carbon composite material, in which three The mass fraction of antimony oxide is 70%.

[0034]The above composite materials were prepared into sodium-ion batteries. The specific steps are: mix the prepared antimony trioxide powder with acetylene black and binder PVDF (polyvinylidene fluoride) according to the weight ratio of 80:10:10, and add an appropriate amount of NMP (N-methylpyrrolidone) solution Ultrasonic dispersion, stirring evenly to form a slurry coated on the copper foil, dried and cut into Φ = 15mm pole piece, dried at 120 ℃ under vacuum for 10 hours, randomly transferred into the glove box for later use. The test method of the asse...

Embodiment 3

[0036] In this embodiment, a ball milling method is used to prepare antimony trioxide / iron oxide composite material, and the specific steps are:

[0037] Mix antimony trioxide powder with iron nitrate (mass ratio 1:5) by ball milling at 500 rpm for 10 hours, and heat-treat the mixed powder at 300°C for 5 hours to obtain antimony trioxide / iron oxide composite material, in which The mass fraction of diantimony is about 50%.

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Abstract

The invention discloses preparation methods of antimony trioxide and an antimony trioxide composite material and applications of the antimony trioxide and the antimony trioxide composite material in sodium-ion batteries. The antimony trioxide and the antimony trioxide composite material are used as sodium-ion battery negative electrode materials. The antimony trioxide composite material is prepared from the antimony trioxide, metal or metallic oxides by using a complex method, wherein the metal comprises Ag, Au, Cu, Fe, Sn, Si and Ni, the metallic oxides comprise nickel oxide, copper oxide, tin oxide, cobalt oxide, iron oxide and manganese oxide, and the mass percentage of the antimony trioxide is 50-99%. The antimony trioxide and the antimony trioxide composite material which are prepared by using multiple effective methods are used as the sodium-ion battery negative electrode materials, have the advantages of high specific capacity and good cycling stability, and simultaneously are low in manufacturing cost and suitable for large-scale development and application of the sodium-ion batteries.

Description

technical field [0001] The invention relates to a preparation method of antimony trioxide and a composite material and an application in a sodium ion battery, belonging to the field of secondary batteries. Background technique [0002] In recent years, due to its advantages of light weight, high voltage, high capacity, high power, stable discharge, and environmental friendliness, lithium-ion batteries have shown broad potential in portable electronic devices, electric vehicles, space technology, and defense industries. Application prospects and potential huge economic benefits. However, limited lithium resources and rising lithium raw material prices limit the large-scale development of lithium-ion batteries. [0003] On the other hand, the reserves of sodium element are extremely abundant (the metal elements in the earth's crust rank fourth, accounting for 2.64% of the total reserves), and the price is low. It is in the same main group as lithium, with similar chemical pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/48H01M4/62
CPCH01M4/366H01M4/483H01M4/62H01M4/625H01M10/05Y02E60/10
Inventor 姜银珠胡梅娟严密
Owner ZHEJIANG UNIV
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