Preparation method of aluminum ion battery cathode material

Abstract

The invention discloses a preparation method of an aluminum ion battery cathode material, which comprises the following steps: adding cobalt salt and carbon nanotubes into a three-neck flask, adding absolute ethyl alcohol, carrying out ultrasonic dispersion, reacting under the condition of introducing nitrogen at a certain temperature, cooling the liquid, transferring into a centrifuge tube, centrifuging and filtering the liquid, washing the liquid with absolute ethyl alcohol, and drying the liquid to obtain a precursor; adding the precursor, sodium sulfide and cyclodextrin into an absolute ethyl alcohol solution, carrying out ultrasonic treatment, transferring the mixture into a high-pressure reaction kettle, and reacting at a certain temperature; then cooling, washing, drying and grinding the reaction product, putting the reaction product into a tubular furnace, calcining the reaction production a mixed gas atmosphere, cooling and taking out the material and grinding and crushing thematerial; then adding the ground solid particles and dopamine hydrochloride into absolute ethyl alcohol, ultrasonically dispersing the mixture, transferring the mixture into a high-pressure reactionkettle, reacting at a certain temperature, and cooling, filtering and drying the mixture, and grinding the mixture by using a mortar to obtain the positive electrode material of the aluminum ion battery. After the positive electrode material is circulated for 180 times, the specific discharge capacity of the positive electrode material is still kept in a relatively good range.

Description

technical field [0001] The invention belongs to the technical field of aluminum ion batteries, and in particular relates to a preparation method of a positive electrode material of an aluminum ion battery. Background technique [0002] In recent years, with the increasing market demand for high-energy-density batteries, the need to develop power batteries and energy storage batteries with high energy, low cost, long life, green environmental protection, abundant battery material resources, and recyclability is becoming more and more urgent. The theoretical specific capacity of metal aluminum is second only to lithium, but its volume specific capacity is four times that of lithium, which is higher than any other metal material. As a negative electrode material and applied to aluminum ion batteries, it has high application potential and commercial value. [0003] Metal sulfides have more easily polarized anion skeletons and ion transport paths, the electronegativity of sulfur ...

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Problems solved by technology

[0003] Metal sulfides have more easily polarized anion skeletons and ion transport paths, the electronegativity of sulfur is lower, and the ionic radius is larger, so metal sulfides have greater potential in realizing the intercalation and diffusion of aluminum ions, and have great potential. Good thermal stability and conductivity, but metal sulfides often have the defect that the discharge specific capacity will drop sharply after repeated use in the process of applying metal sulfides to the positive electrode materials of aluminum ion batteries, resulting in a sharp decline in the performance of aluminum ion batteries

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