Heterojunction MXene@PANI Inks with Fast Ion Migration and Strong Structural Stability by Microcosmically
Yihan Wang1,2,3, Yuxun Yuan4, Xiangrong Chen2
1Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
ACS Applied Materials & Interfaces
|June 9, 2025
Summary
We developed stable MXene/polyaniline inks for printable electronics. These inks enable faster ion transport and enhanced performance in microsupercapacitors, overcoming limitations of pure MXene materials.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Two-dimensional transition metal carbide/nitride (MXene) conductive inks show promise for flexible electronics.
- Intrinsic self-stacking and instability of MXene hinder their use in microsupercapacitors.
Purpose of the Study:
- To create stable and fast-ion-transporting MXene-based inks for microsupercapacitors.
- To address the limitations of pure MXene materials in energy storage applications.
Main Methods:
- Fabrication of heterojunction Ti3C2Tx/polyaniline inks via intercalation and cross-linking.
- Theoretical calculations of ion migration energy barriers and electronic properties.
- Experimental characterization of microsupercapacitor performance.
Main Results:
- The Ti3C2Tx/polyaniline heterojunction exhibited a lower ion migration energy barrier (2.44 eV) compared to pure Ti3C2Tx (3.29 eV).
- Microsupercapacitors demonstrated a high areal capacitance (71 mF cm-2), excellent rate performance (93.6%), and superior cyclic stability (95.2% retention after 10,000 cycles).
- Performance significantly surpassed that of pure MXene microsupercapacitors.
Conclusions:
- The developed heterojunction inks offer enhanced ion transport and structural stability.
- This approach provides a viable strategy for constructing high-performance MXene-based electronic inks.
- Promotes the practical application of MXene inks in advanced electronic devices.
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