Preparation method of sodium-sulfur battery positive electrode material and application thereof

A sodium-sulfur battery and positive electrode material technology, applied in the field of material chemistry, can solve the problems of affecting the sulfur loading of active materials and losing the layered structure, and achieve the effects of high industrialization feasibility, increased energy density, and high yield

Active Publication Date: 2019-11-26
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Ti 3 C 2 When nanosheets are used as sulfur-loaded materials for the positive electrode of sodium-sulfur batteries, it is inevitable that the stacking phenomenon between sheets will occur, which will lead to Ti 3 C 2 The nanosheets lose their original hierarchical structure, which affects the loading capacity of the active material sulfur

Method used

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  • Preparation method of sodium-sulfur battery positive electrode material and application thereof
  • Preparation method of sodium-sulfur battery positive electrode material and application thereof

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Experimental program
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Embodiment 1

[0028] Ti with spherical three-dimensional porous structure 3 C 2 / S composite cathode material, comprising the following steps:

[0029] The first step is to prepare Ti 3 C 2 Dispersions.

[0030] Phase MAX to Ti 3 C 2 Al powder is slowly dispersed in deionized water, and the MAX phase Ti is made by a high-power ultrasonic machine 3 C 2 The Al powder is uniformly dispersed in deionized water to obtain an aqueous dispersion. where the MAX phase Ti 3 C 2 The mass volume ratio of Al powder to deionized water is 1:200g / mL. Then, under the action of magnetic stirring, the HF solution was slowly added dropwise. Wherein, the concentration of the HF solution is 40 wt%, and the volume of the HF solution is 50% of the volume of the aqueous phase dispersion. After the dropwise addition was completed, the magnetic stirring was continued for 24 h. After the magnetic stirring is completed, wait for the reaction system to stand for stratification, and use deionized water and ab...

Embodiment 2

[0039] Embodiment 2: other is the same as embodiment 1, difference is the second step Ti 3 C 2 Solute and SiO 2 The mass ratio of solute is 1:40.

Embodiment 3

[0040] Embodiment 3: other is with embodiment 1, difference is the second step Ti 3 C 2 Solute and SiO 2 The mass ratio of solute is 1:50.

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Abstract

The invention relates to a preparation method of a sodium-sulfur battery positive electrode material and application of the sodium-sulfur battery positive electrode material in a sodium-sulfur battery. The preparation method of the positive electrode material comprises the steps of preparing a sulfur-carrying material with a spherical three-dimensional porous structure by using a hard template-based pore forming technology and a spray drying technology granulation technology, and further preparing the composite positive electrode material with sulfur powder. The Ti3C2/S composite positive electrode material has the characteristics of good conductivity, special two-dimensional layered structure, higher specific surface area and the like, is applied to the sodium-sulfur battery, and is beneficial to high-speed transmission of electrons, so that the battery performance is improved.

Description

technical field [0001] The present invention relates to a preparation method of anode material for a sodium-sulfur battery and its application in a sodium-sulfur battery, in particular to a preparation method of a spherical three-dimensional porous sulfur-carrying material based on hard template pore making and spray drying granulation technology The method belongs to the field of material chemistry. Background technique [0002] Today's world is facing severe energy problems, and traditional fossil fuel resources are limited. With the continuous advancement of the industrialization process, the demand for energy in human life and production is increasing day by day. It is imminent to develop a high-efficiency, low-carbon, clean, sustainable energy and related energy conversion and storage technologies. At present, lithium-sulfur batteries are very promising next-generation lithium secondary batteries with high energy density. The theoretical specific capacity of sulfur is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/39
CPCH01M4/366H01M4/38H01M4/625H01M4/628H01M10/3909H01M2004/021H01M2004/028Y02E60/10
Inventor 钊妍孙正豪
Owner INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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