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A kind of nanocomposite material and its preparation method and application

A nanocomposite material and technology of preparation steps, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as the inability to apply sodium ion batteries, achieve high reversible specific capacity, stable products, Effect of improving cycle stability and sodium storage performance

Inactive Publication Date: 2019-07-05
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Compared with lithium-ion batteries, sodium-ion batteries have obvious differences in electrode materials. For example, graphite has been widely used in commercial lithium-ion batteries and has a high theoretical capacity, but it cannot be used in sodium-ion batteries.

Method used

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  • A kind of nanocomposite material and its preparation method and application
  • A kind of nanocomposite material and its preparation method and application
  • A kind of nanocomposite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of embedding structure MoS 2 The preparation method of Sb sodium ion battery negative electrode material comprises the steps:

[0031] (1) Add 0.14g MoO to 20mL ethylene glycol 3 and 1.2g Na 2 S, solution A is obtained after magnetic stirring;

[0032] (2) Add 0.2g SbCl to 20mL ethylene glycol 3 , to obtain solution B by magnetic stirring;

[0033] (3) Under stable magnetic stirring conditions, solution B is added dropwise in solution A, after the dropwise addition is completed, the resulting mixed solution is transferred to a stainless steel high-pressure reactor containing a polytetrafluoroethylene liner, and the reactor is placed Put it into an electric blast drying oven, and keep the temperature at 200°C. After reacting for 24 hours, let it cool down to room temperature naturally.

[0034] (4) The product was separated by centrifugation, washed several times with deionized water and ethanol, and then dried in a vacuum oven for 12 hours.

[0035] see fi...

Embodiment 2

[0039] A kind of embedding structure MoS 2 The preparation method of Sb sodium ion battery negative electrode material comprises the steps:

[0040] (1) Add 0.28g MoO to 20mL ethylene glycol 3 and 1.2g Na 2 S, solution A is obtained after magnetic stirring;

[0041] (2) Add 0.2g SbCl to 20mL ethylene glycol 3 , to obtain solution B by magnetic stirring;

[0042] (3) Under stable magnetic stirring conditions, solution B is added dropwise in solution A, after the dropwise addition is completed, the resulting mixed solution is transferred to a stainless steel high-pressure reactor containing a polytetrafluoroethylene liner, and the reactor is placed Put it into an electric blast drying oven, and keep the temperature at 200°C. After reacting for 24 hours, let it cool down to room temperature naturally.

[0043] (4) The product was separated by centrifugation, washed several times with deionized water and ethanol, and then dried in a vacuum oven for 12 hours.

Embodiment 3

[0045] A kind of embedding structure MoS 2 The preparation method of Sb sodium ion battery negative electrode material comprises the steps:

[0046] (1) Add 0.07g MoO to 20mL ethylene glycol 3 and 1.2g Na 2 S, solution A is obtained after magnetic stirring;

[0047] (2) Add 0.2SbCl to 20mL ethylene glycol 3 , to obtain solution B by magnetic stirring;

[0048] (3) Under stable magnetic stirring conditions, solution B was added dropwise to solution A, and after the addition was complete, the resulting mixed solution was transferred to a stainless steel autoclave with a polytetrafluoroethylene liner, and the autoclave was placed Put it into an electric blast drying oven, and keep the temperature at 200°C. After reacting for 24 hours, let it cool down to room temperature naturally.

[0049] (4) The product was separated by centrifugation, washed several times with deionized water and ethanol, and then dried in a vacuum oven for 12 hours.

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Abstract

The invention provides a nanocomposite material and its preparation method and application, the nanocomposite material is MoS 2 The invention relates to an embedded composite structure of ultra-thin nanosheets and Sb nanosheets, which belongs to the technical field of preparation of electrode materials for sodium ion batteries. One-step synthesis of MoS by solvothermal method 2 / Sb nanocomposites, MoS 2 can effectively alleviate the volume expansion of Sb during charge and discharge, and Sb can prevent MoS 2 The superposition of nanosheets, through the synergistic effect of the two materials, improves the cycle stability and sodium storage performance of the composite material as the anode material of the sodium ion battery. The preparation process of the invention is simple, high in repeatability, stable in product and short in cycle, which is beneficial to convenient production. MoS obtained by this method 2 The / Sb composite material has a two-dimensional embedded structure, and as an anode material for sodium-ion batteries, it has the characteristics of high reversible specific capacity and excellent cycle stability.

Description

technical field [0001] The invention belongs to the field of preparation of electrode materials for sodium ion batteries, and specifically relates to a nanocomposite material and its preparation method and application. The nanocomposite material is MoS with embedded structure 2 / Sb sodium ion battery negative electrode material, also relates to a kind of MoS with embedded structure prepared by solvothermal method 2 / Sb high-performance sodium-ion battery anode material method. Background technique [0002] With people's widespread attention to renewable energy and new energy, as well as the vigorous development of new energy vehicles and smart grids, research on efficient and convenient energy storage technologies has become a research hotspot worldwide. Compared with lithium-ion batteries, which suffer from the lack of lithium resources in the world, sodium-ion batteries have very broad application prospects due to their physical and chemical properties similar to lithium-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/58H01M10/054B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/362H01M4/38H01M4/5815H01M10/054Y02E60/10
Inventor 安长华李闯王淑涛王兆杰张军
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)