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Phosphorus-Regulated Te-Vacancy-Localized Re2Te5 Anchored on TiN/MXene as High-Energy Anode for all-Solid-State
Haotian Hu1, Mai Li1, Jiayi Shen1
1College of Physics, Donghua University, Shanghai, 201620, China.
Small Methods
|November 10, 2025
Summary
This study introduces a novel solid-state supercapacitor using a P-A/C-Re2Te5@TiN/MXene anode and a specialized electrolyte. The new design offers high energy density and stability for advanced portable electronics.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Conventional liquid-electrolyte supercapacitors suffer from leakage risks and low energy density, limiting their use in portable electronics.
- Developing safe, high-performance solid-state energy storage is crucial for next-generation devices.
Purpose of the Study:
- To engineer a novel solid-state supercapacitor with enhanced energy density and stability.
- To overcome the limitations of traditional supercapacitors through advanced material design and interface optimization.
Main Methods:
- Fabrication of a P-doped Re2Te5 anode integrated with a TiN/MXene conductive framework.
- Development of a silicon dioxide (SiO2)-optimized polyvinyl alcohol (PVA)/lithium chloride (LiCl) solid electrolyte.
- Utilizing density functional theory (DFT) calculations to validate material properties and interfacial behavior.
- Device fabrication and electrochemical performance testing in both coin cell and flexible pouch configurations.
Main Results:
- The P-doped Re2Te5 anode exhibited high Li+ adsorption sites and intrinsic conductivity, achieving a specific capacitance of 1458 F g-1.
- The TiN/MXene framework provided a stable conductive network, enhancing charge transfer and electrode integrity.
- The integrated solid-state supercapacitor demonstrated high energy density (56.3 Wh kg-1 in coin cells, 84.6 Wh kg-1 in pouch cells) and power density (780 W kg-1).
- Exceptional cycling stability and 120° bending durability were observed in the flexible device.
Conclusions:
- The developed solid-state supercapacitor system effectively addresses the limitations of conventional supercapacitors.
- This flexible, high-energy storage platform shows significant potential for applications in wearable technology.
- The study highlights the success of defect engineering, heterojunction design, and interface optimization in advancing energy storage solutions.
