Preparation method and application of high-energy-density all-solid-state supercapacitor negative electrode molar superlattice MXene material

By preparing large-angle twisted moiré superlattice MXene materials and assembling all-solid-state supercapacitors, the problem of insufficient power density for UAVs was solved, realizing a power supply with high energy density and long cycle life. This provides a high-energy-density power supply for low-altitude economic UAVs and promotes the development of the low-altitude economic industry.

CN122202074APending Publication Date: 2026-06-12LIAONING UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LIAONING UNIVERSITY OF TECHNOLOGY
Filing Date
2026-03-13
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing drone power supplies have insufficient energy density. Lithium-ion batteries and traditional supercapacitors cannot meet the high energy density requirements, resulting in short flight time and low operational efficiency. Furthermore, the traditional MXene material preparation process is highly polluting and difficult to control in terms of structure, making it impossible to improve the energy density of supercapacitors.

Method used

A helical dislocation structure MAX phase precursor was prepared by hot isostatic pressing sintering. Combined with microwave and electrochemical etching-intercalation synchronous coupling process, a large-angle twisted moiré superlattice MXene material was prepared. Paired with Ti3C2/RuO2 composite cathode and sodium-based NASICON-type lithium-free solid electrolyte, a high energy density all-solid-state supercapacitor was constructed.

Benefits of technology

A breakthrough improvement in energy density of all-solid-state supercapacitors, ranging from 357 to 412 Wh/kg, has been achieved. It boasts a long cycle life and a flight time of 4.1 to 4.8 hours, significantly enhancing the endurance of drones and solving the problem of insufficient power energy density.

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Abstract

The application relates to a preparation method of a high-energy-density full-solid-state supercapacitor negative molar superlattice MXene material and application thereof. The method comprises the following steps: preparing a MAX phase precursor with a spiral dislocation characteristic through a hot isostatic pressing regulation technology; adopting a microwave-assisted electrochemical etching-intercalation coupling process to realize differential dislocation removal of A-site elements and in-situ doping of Fe elements by taking an NH4Cl-FeCl3 composite system as an etching electrolyte and taking TMAOH as an intercalation agent; and finally constructing a large-angle torsion molar superlattice MXene electrode material. The material is used as a negative electrode to assemble a full-solid-state supercapacitor, and the core performance realizes an energy density of 357-412 Wh / kg, a specific capacity of 411.3-474.6 F / g, a 10000-cycle capacity retention rate of 89.5-95.1%, and a charge transfer resistance of less than 10 omega. The material has a wide application prospect in the fields of unmanned aerial vehicles such as logistics distribution and emergency rescue.
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