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A kind of preparation method of antimony trioxide/redox graphene composite material

A technology of antimony trioxide and composite materials, applied in nanotechnology for materials and surface science, secondary batteries, electrochemical generators, etc., can solve the problems of chemical energy storage, poor chemical stability, etc., and achieve high quality Recyclability, good application prospects, and the effect of excellent recyclability

Active Publication Date: 2022-02-22
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of antimony trioxide / reduced graphene oxide (Sb 2 o 3 / rGO) composite materials, which are mainly used as anode materials for lithium / sodium ion batteries

Method used

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  • A kind of preparation method of antimony trioxide/redox graphene composite material
  • A kind of preparation method of antimony trioxide/redox graphene composite material
  • A kind of preparation method of antimony trioxide/redox graphene composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0027]Take 0.30 g of antimony trioxide, dissolve it in 20 mL of ethylene glycol, heat and stir at 120 ° C for 1 h, after cooling to room temperature, add 0.1 g of freeze-dried graphene, stir well, add 1 g of sodium borohydride, and stir for 1 h; Wash by filtration and collect samples, grind, and dry to obtain black Sb / Sb 2 o 3 / rGO precursor. Sb / Sb 2 o 3 / rGO precursor was dissolved in 30% graphene aqueous solution, hydrothermally reacted at 140°C for 12h, cooled to room temperature, ground and dried to obtain Sb 2 o 3 / rGO composites.

[0028] The composite material is used as the negative electrode material of lithium-ion batteries, and the specific capacity of the first charge and discharge reaches 938.7 / 1525.8mAh g -1 , the first Coulombic efficiency is 61.52%, and the reversible specific capacity after 100 cycles is 779.1 mAh g -1 .

[0029] The composite material is used as the negative electrode material of sodium ion battery, and the specific capacity of the fi...

Embodiment 2

[0031] Take 0.30 g of antimony trioxide, dissolve it in 30 mL of ethylene glycol, heat and stir at 120 ° C for 1 h, after cooling to room temperature, add 0.1 g of freeze-dried graphene, stir well, add 2 g of sodium borohydride, and stir for 2 h; Wash by filtration and collect samples, grind, and dry to obtain black Sb / Sb 2 o 3 / rGO precursor; Sb / Sb 2 o 3 / rGO precursor was dissolved in 40% graphene aqueous solution, hydrothermally reacted at 140°C for 12h, cooled to room temperature, ground and dried to obtain Sb 2 o 3 / rGO composites.

[0032] The composite material is used as the negative electrode material of lithium-ion batteries, and the specific capacity of the first charge and discharge reaches 853.7 / 1448.8mAh g -1 , the first Coulombic efficiency is 58.92%, and the reversible specific capacity after 100 cycles is 699.3 mAh g -1 .

[0033] The composite material is used as the negative electrode material of sodium ion battery, and the specific capacity of the fi...

Embodiment 3

[0035] Take 0.30 g of antimony trioxide, dissolve it in 40 mL of ethylene glycol, heat and stir at 120 ° C for 1 h; after cooling to room temperature, add 0.1 g of freeze-dried graphene, stir well, add 3 g of sodium borohydride, and continue stirring for 3 h ; Wash and collect samples by suction filtration, grind and dry to obtain black Sb / Sb 2 o 3 / rGO precursor; Sb / Sb 2 o 3 / rGO precursor was dissolved in 50% graphene aqueous solution, hydrothermally reacted at 140°C for 12h, cooled to room temperature, ground and dried to obtain Sb 2 o 3 / rGO composites.

[0036] The composite material is used as the negative electrode material of lithium-ion batteries, and the specific capacity of the first charge and discharge reaches 774.1 / 1353.6mAh g -1 , the first Coulombic efficiency is 57.12%, and the reversible specific capacity after 100 cycles is 627.3 mAh g -1 .

[0037] The composite material is used as the negative electrode material of sodium ion battery, and the speci...

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Abstract

The invention provides a preparation method of antimony trioxide / redox graphene composite material, which uses antimony trioxide and graphene oxide as raw materials, and synthesizes the former by chemical reduction under the action of a strong reducing agent. Body Sb / Sb 2 o 3 / rGO; then the precursor Sb / Sb 2 o 3 / rGO was dissolved in 10-30% graphene aqueous dispersion for secondary hydrothermal compounding, and Sb with smaller size and uniform dispersion of antimony trioxide was obtained. 2 o 3 / rGO nanocomposites. The nano-composite material is used for the negative electrode material of lithium ion battery, has high theoretical specific capacity and excellent recyclability; is used for the negative electrode material of sodium ion battery, has excellent recyclability, and low cost, high mass specific capacity, has Very good application prospects.

Description

technical field [0001] The invention relates to a preparation method of antimony trioxide / reduced graphene oxide composite nanometer material, which is mainly used for negative electrode materials of lithium / sodium ion batteries. Background technique [0002] With the increase of human demand for energy, rechargeable batteries play an increasingly critical role in the storage and utilization of new energy. Lithium-ion / sodium-ion batteries are the fastest-growing and most promising rechargeable batteries for high-efficiency chemical energy storage and energy supply. , so it is widely used in electronic devices such as mobile phones and notebook computers. The anode materials of current commercial lithium-ion batteries are graphite and other forms of carbon materials. Since the theoretical capacity of graphite is only 372mAh g -1 , and the lithium intercalation potential is low, which limits its application range. [0003] Antimony-based oxides are environmentally friendly,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/587H01M4/62H01M10/0525H01M10/054B82Y30/00
CPCH01M4/362H01M4/483H01M4/587H01M4/625H01M10/0525H01M10/054B82Y30/00Y02E60/10
Inventor 周小中刘俊才陆和杰雷自强王武强雷玉彤
Owner NORTHWEST NORMAL UNIVERSITY