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Re-stickable All-Solid-State Supercapacitor Supported by Cohesive Thermoplastic for Textile Electronics.

Guilin Tang1,2, Yan Qiao1,2, Ling Yu1,2

  • 1Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, School of Materials & Energy, Southwest University, 1 Tiansheng Road, Chongqing 400715, P. R. China.

ACS Applied Materials & Interfaces
|September 11, 2020
PubMed
Summary

Researchers developed a washable, all-solid-state supercapacitor using parafilm, a thermoplastic. This flexible electronic device maintains performance after washing and bending, offering a durable solution for wearable technology.

Keywords:
flexible electronicssupercapacitortextilethermoplasticwaterproof

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Textile Electronics

Background:

  • Textile-based flexible electronics offer excellent conformability and skin affinity but are vulnerable to damage during machine washing.
  • Existing flexible electronic devices often fail due to component damage from washing processes, limiting their practical application in wearable technology.

Purpose of the Study:

  • To develop a robust, washable substrate and encapsulation material for textile-based flexible electronics.
  • To fabricate a high-performance, all-solid-state supercapacitor and a piezoresistive sensor using a novel material strategy.
  • To demonstrate a universal approach for creating durable, re-stickable electronic devices for wearable applications.

Main Methods:

  • Utilized parafilm, a commercially available cohesive thermoplastic, as both the substrate and encapsulating material for device fabrication.
  • Constructed an all-solid-state supercapacitor and a parafilm-based piezoresistive sensor.
  • Evaluated device performance under various conditions, including washing, bending, twisting, and pressure sensing.

Main Results:

  • The parafilm-based supercapacitor exhibited excellent capacitive behavior (73.7 F/g at 1 A/g) and a long cycle life (>90% retention after 5000 cycles).
  • The device demonstrated remarkable flexibility (capacitance retention >98% after 100 bending/twisting cycles) and water resistance (98% capacitance retention after water exposure).
  • A parafilm-based piezoresistive sensor showed good pressure-sensing performance, validating the material's versatility.

Conclusions:

  • Parafilm serves as an effective substrate and encapsulant for creating durable, washable, and flexible electronic devices.
  • The proposed strategy offers a universal solution to overcome machine-washing challenges in textile electronics.
  • This work enables novel flexible electronic systems for wearable applications with enhanced longevity and washability.