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Micro-Nano Composite Structures: General Resolution for Transparent-to-Multicolored Electrochromic Supercapacitors

Qilin Wang¹, Chenchen Bian², Zhibo Zheng³

¹Engineering Research Center of Special Engineering Plastics, Ministry of Education, National and Local Joint Engineering Laboratory for Synthetic Technology of High Performance Polymer, College of Chemistry, Jilin University, Changchun 130012, China.

Polymer Science & Technology (Washington, D.C.)

|June 8, 2026

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This summary is machine-generated.

Researchers developed a new device construction strategy for electrochromic supercapacitors (ECSs) using high-performance polymers, tin oxide, and vanadium oxide. This innovation enhances energy efficiency and performance for smart windows and displays.

Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

The electrochromic (EC) phenomenon offers energy-saving potential for smart windows and displays.
Integrated functionality in a single device requires novel construction strategies.
High-performance polymers (HPPs) like poly-(arylsulfones) and poly-(aryl ketones) exhibit tunable optical properties.

Purpose of the Study:

To develop a versatile device construction strategy for electrochromic supercapacitors (ECSs).
To integrate electrochromic and energy storage functions into a single device.
To enhance the performance of EC devices for smart windows and displays.

Main Methods:

Coupling HPPs with conductive substrate modification layers (SnO2) and ion storage layers (V2O5).

Keywords:

Device fabrication Electrochromism High-performance polymer Porous composite structure Supercapacitor

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Utilizing SnO2 nanosheets for porous microstructures to improve response speed.

Employing modified V2O5 nanowires as counter electrode materials compatible with EC materials.

Main Results:

A P-TST@SnO2/V2O5 device achieved a 68.07% optical contrast ratio.
Coloring time was reduced by over 2/3, and coloration efficiency nearly doubled.
The strategy improved capacitive properties and demonstrated material compatibility for multi-functionality.

Conclusions:

The proposed construction strategy effectively integrates electrochromic and supercapacitor functionalities.
This approach enhances the performance metrics of EC devices, including optical contrast and speed.
The versatile strategy holds promise for advancing multifunctional smart windows and displays.