A flower ball-shaped bismuth disulfide / tungsten disulfide composite material, a preparation method and application thereof

By preparing flower-shaped bismuth disulfide/tungsten disulfide composite materials, the problems of unstable structure and poor conductivity in potassium-ion batteries were solved, enabling efficient application and low-cost production of the materials.

CN117228722BActive Publication Date: 2026-03-17SHAANXI UNIV OF SCI & TECH
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Patent Information

Application Number
CN202311221506.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-09-20
Publication Date
2026-03-17
Estimated Expiration
2043-09-20

AI Technical Summary

Technical Problem

The low availability of lithium on Earth limits the large-scale application of lithium-ion batteries. Potassium-ion batteries suffer from structural instability and poor conductivity during charging and discharging, resulting in capacity decay and poor cycle stability.

Method used

Using bismuth nitrate pentahydrate, tungsten hexachloride, and thioacetamide as raw materials, a flower-shaped bismuth disulfide/tungsten disulfide composite material was prepared through homogeneous reaction, forming a self-assembled nanoflower structure with vertically grown nanosheets, which improves the structural stability and conductivity of the material.

Benefits of technology

The prepared composite material has a more stable structure and better conductivity, which significantly improves the electrochemical performance of potassium-ion battery anode materials. It is suitable for large-scale production and has low cost.

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Abstract

The application discloses a flower ball-shaped bismuth disulfide / tungsten disulfide composite material and a preparation method and application thereof. Tungsten hexachloride is added into anhydrous ethanol solution and fully stirred, then bismuth nitrate pentahydrate is added into the mixed solution and stirred to uniformly disperse the bismuth nitrate pentahydrate into the solution, then thioacetamide is added and stirred to be uniform, the obtained solution is moved into a reaction kettle, and the reaction kettle is sealed and placed into a homogeneous reactor; after the reaction is completed, the product is taken out, washed and fully dried in a vacuum oven to obtain the composite material. The composite material has a thickness of 20-30 nm, and nanosheets are vertically grown on a self-assembled flower ball-shaped structure with a diameter of 350-400 nm; the composite material can be applied to preparation of a potassium ion battery negative electrode material, and the structure is more stable, the conductivity is better, and the electrochemical performance is greatly improved.
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