A preparation method of a supercapacitor based on a molybdenum disulfide film electrode

By using cesium salt aqueous solution and chemical lithiation reaction to prepare molybdenum disulfide thin film electrodes, the rate performance defects of existing supercapacitors are solved, and a supercapacitor with high volume capacitance and high power performance is realized, which is suitable for small-volume, high-power energy storage scenarios.

CN122370198APending Publication Date: 2026-07-10SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTHEAST UNIV
Filing Date
2026-05-21
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing supercapacitors based on molybdenum disulfide thin-film electrodes have rate performance defects and cannot meet the application requirements of high-power energy storage.

Method used

Cesium salt aqueous solution was used as the electrolyte, and molybdenum disulfide powder was converted into a self-supporting layered dense thin film electrode through chemical lithiation reaction. The electrochemical performance of the electrode material was optimized by combining the low diffusion barrier and weak solvation effect of cesium ions.

Benefits of technology

It significantly improves the charge transfer efficiency and ion storage kinetics at the electrode interface, achieving high volumetric capacitance and high rate performance, adapting to the application requirements of small-volume, high-power energy storage scenarios, and possessing excellent long-cycle stability.

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Abstract

This invention discloses a method for preparing a supercapacitor based on a molybdenum disulfide thin film electrode, comprising the following steps: (1) immersing molybdenum disulfide powder in a butyllithium solution to complete a chemical lithiation reaction; after the reaction, washing the resulting lithiation product and then adding it to deionized water for ultrasonic exfoliation; centrifuging after ultrasonic exfoliation to obtain a molybdenum disulfide nanosheet suspension; the suspension is vacuum filtered to form a film to obtain a re-stacked molybdenum disulfide thin film electrode; (2) adding cesium salt to deionized water and stirring at room temperature until completely dissolved to obtain a cesium salt aqueous solution, which serves as the aqueous electrolyte for the supercapacitor; (3) assembling the re-stacked molybdenum disulfide thin film electrode from step (1) and the cesium salt aqueous solution from step (2) into a supercapacitor under normal atmospheric conditions. The supercapacitor of this invention possesses excellent high-rate charge-discharge performance and maintains good capacitance retention even under high-current charge-discharge conditions.
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