Improved Performance of All-Solid-State Flexible Supercapacitor Based on the Stress-Compensation Effect.
D Y Wang1, Z Q Dong1, S Zhang1
1The 54th Research Institute of the China Electronics Technology Group Corporation, Shijiazhuang 050011, China.
Journal of Nanoscience and Nanotechnology
|January 6, 2021
Summary
A novel symmetrical sandwich-structured electrode significantly improves flexible polyaniline (PANI)-based supercapacitors (SC). This design enhances PANI deposition uniformity, mechanical stability, and electrochemical performance, leading to high energy density and excellent capacitance retention.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Flexible electronics require robust energy storage solutions.
- Polyaniline (PANI) is a promising material for supercapacitors but faces challenges in uniform deposition and mechanical stability.
Purpose of the Study:
- To develop a facile strategy for fabricating flexible polyaniline-based supercapacitors with enhanced performance.
- To investigate the impact of a symmetrical sandwich-structured electrode on polyaniline deposition and supercapacitor stability.
Main Methods:
- Fabrication of flexible electrodes using a symmetrical sandwich-structured configuration (PANI/flexible porous support/PANI).
- Electrochemical characterization of the supercapacitor performance, including capacitance, energy density, and cycling stability.
- Comparison with conventional electrodes (PANI/flexible support).
Main Results:
- The symmetrical sandwich-structured electrode suppressed support bending during electrodeposition, enabling uniform PANI film formation.
- This configuration improved mechanical stability by balancing stress during charge/discharge cycles.
- Supercapacitors utilizing the symmetrical electrode exhibited superior specific areal capacitance (369.2 mF·cm⁻²), higher energy density (0.031 mWh·cm⁻²), and excellent cycling retention (93.2% over 6000 cycles).
Conclusions:
- The symmetrical sandwich-structured electrode design is an effective strategy for developing high-performance flexible polyaniline-based supercapacitors.
- This approach overcomes limitations of conventional electrode designs, offering improved uniformity, stability, and electrochemical characteristics.
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