Molybdenum selenide composite carbonized sonchus oleraceus corolla hair used as electrode material of sodium ion battery

Abstract

The invention provides a molybdenum selenide composite carbonized sonchus oleraceus corolla hair used as an electrode material of a sodium ion battery, which comprises the steps of putting sonchus oleraceus corolla hair powder into a porcelain boat, heating to the temperature of 500 DEG C under the protection of argon, and continuously carbonizing the sonchus oleraceus corolla hair powder for two hours to obtain a carbonized sonchus oleraceus corolla hair material; dissolving Na2MoO4 in deionized water, adding selenium powder, and dissolving with N2H2.H2O; slowly adding dimethylformamide to obtain a black solution, transferring the black solution into a polytetrafluoroethylene reaction kettle, sealing the reaction kettle, and heating at temperature of 200 DEG C for 12 hours; and after the reaction kettle is naturally cooled, taking out the solution, diluting the solution with deionized water until the pH value is neutral, carrying out suction filtration to obtain powder, and drying the powder in a drying oven at the temperature of 60 DEG C for 12 hours to obtain the molybdenum selenide composite carbonized sonchus oleraceus corolla hair electrode material. The defects that a sodium ion battery material is low in rate capability, easy to agglomerate, poor in electron and ion conductivity and the like are overcome, and the problems that a sodium ion battery is short in cycle life, low in energy density and the like are solved.

Description

technical field [0001] The invention relates to an electrode material for a sodium-ion battery, in particular to an electrode material for a sodium-ion battery using molybdenum selenide composite carbonized endive cauliflower pappus. Background technique [0002] New energy vehicles and other fields are developing rapidly. In order to meet the future large-scale electrochemical energy storage demand and the increasing cost of lithium batteries, it is imminent to develop and design cheap and stable energy storage devices. Na-ion batteries have attracted extensive attention due to their excellent electrochemical performance and abundant Na resources. The cathode and anode of traditional Na-ion batteries are both slow diffusion reactions, which lead to their poor power density and cycle stability. The structure of a sodium-ion battery is similar to that of a lithium-ion battery. It is composed of a positive electrode, a negative electrode, a separator, and an electrolyte. Its ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a molybdenum selenide composite carbonized endive cabbage hair as an electrode material for sodium ion batteries, which makes up for the shortcomings of sodium ion battery materials such as low rate performance, easy agglomeration, and poor electronic and ion conductivity, and solves the problem. Solved the problems of poor cycle life and low energy density of sodium-ion batteries