Arbitrary deformable and high-strength electroactive polymer/MXene anti-exfoliative composite films assembled into
Yang Zhou1, Yubo Zou1, Zhiyuan Peng1
1College of Materials Science and Engineering, Hunan University, Changsha, 410082, P. R. China. wbzhong@hnu.edu.cn.
Nanoscale
|October 9, 2020
Summary
Flexible all-solid-state supercapacitors (ASSSs) electrodes were developed using Ti3C2Tx MXene-based films. These novel composite films exhibit enhanced mechanical strength and high energy densities for wearable electronics.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Flexible all-solid-state supercapacitors (ASSSs) are crucial for portable and wearable electronics.
- Developing high-performance flexible film electrodes for ASSSs remains a significant challenge.
Purpose of the Study:
- To create bendable, foldable, and anti-exfoliative Ti3C2Tx MXene-based films for supercapacitor electrodes.
- To enhance the mechanical integrity and electrochemical performance of flexible supercapacitor electrodes.
Main Methods:
- In situ oxidant-free polymerization of aniline on Ti3C2Tx nanosheets to form polyaniline/Ti3C2Tx composites (i-PANI@Ti3C2Tx).
- Construction of lignosulfonate (Lig) and Ti3C2Tx into a compact composite (Lig@Ti3C2Tx) film via hydrogen bonding.
- Fabrication of a hybrid film (Lig@Ti3C2Tx/i-PANI@Ti3C2Tx(5/5)) using vacuum-assisted filtration.
Main Results:
- The composite films demonstrated excellent deformability (bending, folding) and superior tensile strength compared to pure Ti3C2Tx films.
- The hybrid films exhibited enhanced vertical-plane tensile strength, indicating effective prevention of exfoliation.
- Supercapacitors assembled with these electrodes achieved high specific capacitances (up to 310 F g-1) and ultrahigh energy densities (up to 34.8 W h L-1).
Conclusions:
- The developed Ti3C2Tx MXene-based composite films offer a promising solution for high-performance flexible electrodes in ASSSs.
- These materials show potential for applications in electromagnetic-interference shielding and batteries.
- The flexible ASSSs are suitable for practical use as wearable energy storage devices.
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