CN-116826041-B - Preparation method of sulfonated asphalt carbon@BiOCl sodium ion battery negative electrode composite material

CN116826041BCN 116826041 BCN116826041 BCN 116826041BCN-116826041-B

Abstract

The invention relates to a preparation method of a sulfonated asphalt carbon@BiOCl sodium ion battery cathode composite material, which comprises the steps of dissolving Bi (NO 3 ) 3 ·5H 2 O and A in ethylene glycol, adding 3-aminopropyl methoxy silane into the mixture, stirring to form a uniform suspension, wherein A is SnCl 4 ·5H 2 O、SnCl 4 or SnCl 2 , adding sulfonated asphalt into the suspension, magnetically stirring the mixture, transferring the mixture into polytetrafluoroethylene, placing the polytetrafluoroethylene into a high-pressure reaction kettle for keeping the temperature between 160 and 200 ℃ for 10 to 24 hours, cooling the reaction kettle to room temperature, centrifugally taking out the reaction kettle, and drying the reaction kettle, and 4) keeping the temperature between 600 and 1000 ℃ in a tubular furnace in an inert atmosphere for 1 to 3 hours until the temperature is reduced to room temperature. The preparation method has the advantages that the sodium ion battery negative electrode composite material with high performance is prepared by a simple one-step hydrothermal method, and the sodium ion battery negative electrode composite material has higher specific capacity and excellent multiplying power performance.

Inventors

WANG KUN
Tian ru
ZENG QINGGANG
LI JIANKE
XU GUIYING
ZHOU WEIMIN
LI ZEWEI
LI LIXIANG
AN BAIGANG

Assignees

鸡西市唯大新材料科技有限公司
辽宁科技大学

Dates

Publication Date: 20260512
Application Date: 20230630

Claims (1)

1. The preparation method of the sulfonated asphalt carbon@BiOCl sodium ion battery anode composite material is characterized by comprising the following steps of: 1) 0.3-0.6g Bi (NO 3 ) 3 ·5H 2 O and 0.1-0.8g A are dissolved in 30-60ml ethylene glycol, and 100-400 mu l 3-aminopropyl methoxy silane is added into the mixture and stirred for 1-10h to form a uniform suspension, wherein the A is SnCl 4 ·5H 2 O、SnCl 4 or SnCl 2 ; 2) Adding 0.1-0.9g of sulfonated asphalt into the suspension, and magnetically stirring for 0.5-1.5h to form uniform mixed suspension; 3) Transferring the mixed suspension into 75-160ml polytetrafluoroethylene, placing the polytetrafluoroethylene into a high-pressure reaction kettle, keeping the temperature at 160-200 ℃ for 10-24 hours, cooling the reaction kettle to room temperature, centrifuging, taking out and drying; 4) And (3) keeping the temperature of the dried sample in a tube furnace at 600-1000 ℃ for 1-3 hours in an inert atmosphere, and cooling to room temperature to obtain the sulfonated asphalt carbon@BiOCl composite material.

Description

Preparation method of sulfonated asphalt carbon@BiOCl sodium ion battery negative electrode composite material Technical Field The invention belongs to the field of sodium ion battery cathode materials, and particularly relates to a preparation method of a sulfonated asphalt carbon@BiOCl sodium ion battery cathode composite material. Background Sodium ion (Na +) battery studies have emerged based on many electrochemical properties of sodium ions that are similar to those of lithium ions. In fact, however, the interaction of Na + with the electrode material does not exhibit the high performance characteristics associated with lithium ion batteries. As lithium resources are continuously consumed, the practical application pace of the sodium ion battery is faster and faster, so the development of high-performance electrode materials of the sodium ion battery is also urgent. The development of the negative electrode material of the sodium ion battery is now in an important position mainly because the electrode potential of the negative electrode material greatly influences the energy density of the sodium ion full battery. To date, research on negative electrode materials of sodium ion batteries is mainly focused on biomass hard carbon, but the hard carbon materials are different in source, uniformity of the properties of the hard carbon materials cannot be guaranteed, and large-scale production of the materials is limited by regions, time and space. The ionic lamellar semiconductor nano-sheet sodium ion battery anode material based on the alloy reaction system enters the eye curtain of researchers due to higher. First, a unique layered structure consisting of alternating layers of anions and cations can provide a fast diffusion path along the ion layer and between the ion layers. Secondly, more importantly, the layered structure unit can provide a larger space for intercalation and deintercalation of sodium ions, so that the problem of volume expansion of the electrode material in the circulation process is fundamentally reduced. BiOCl is a material consisting of alternating layers of [ Bi 2O2]2+ ] stacked between two Cl-ions along the c-axis. However, the conductivity of the material is not excellent enough, and the material is used as an electrode material and is a short plate with poor multiplying power performance in the energy storage process. The improvement method is often adopted, wherein the carbonaceous substrate is coated on the surface of the carbonaceous substrate, and the conductivity of the carbonaceous substrate is improved through carbonization. The main component of the sulfonated asphalt is sodium sulfonate salt of asphalt, which is prepared by the working procedures of sulfonation, neutralization, post-treatment and the like of asphalt under certain conditions. The sulfonated asphalt has the characteristic of water solubility, can avoid the use of organic solvents in the process of coating BiOCl by being used as a carbon precursor, and has the advantages of more energy conservation and environmental protection. Because the sulfonated asphalt has the characteristic of thermosetting, the coated composite material cannot be melted in the heat treatment process, and the preparation process is simpler. Disclosure of Invention In order to overcome the defects of the prior art, the invention aims to provide a preparation method of a sulfonated asphalt carbon@BiOCl sodium ion battery negative electrode composite material, which adopts low-cost and easily-obtained sulfonated asphalt to prepare the sulfonated asphalt carbon@BiOCl sodium ion battery negative electrode composite material through a simple one-step hydrothermal method, so that the sulfonated asphalt carbon@BiOCl sodium ion battery negative electrode composite material has higher specific capacity and excellent multiplying power performance. In order to achieve the above purpose, the present invention is realized by the following technical scheme: The preparation method of the sulfonated asphalt carbon@BiOCl sodium ion battery anode composite material comprises the following steps: 1) 0.3-0.6g Bi (NO 3)3·5H2 O and 0.1-0.8g A are dissolved in 30-60ml ethylene glycol, and 100-400 mu l 3-aminopropyl methoxy silane is added into the mixture and stirred for 1-10h to form a uniform suspension, wherein the A is SnCl 4·5H2O、SnCl4 or SnCl 2; 2) Adding 0.1-0.9g of sulfonated asphalt into the suspension, and magnetically stirring for 0.5-1.5h to form uniform mixed suspension; 3) Transferring the mixed suspension into 75-160ml polytetrafluoroethylene, placing the polytetrafluoroethylene into a high-pressure reaction kettle, keeping the temperature at 160-200 ℃ for 10-24 hours, cooling the reaction kettle to room temperature, centrifuging, taking out and drying; 4) And (3) keeping the temperature of the dried sample in a tube furnace at 600-1000 ℃ for 1-3 hours in an inert atmosphere, and cooling to room temperature to obtain the sulfonated asphalt ca