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Related Concept Videos

MOS Capacitor01:25

MOS Capacitor

793
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
793

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Highly Ionic Conductive, Stretchable, and Tough Ionogel for Flexible Solid-State Supercapacitor.

Ying Wang1, Zhengxuan Wei1, Tongtai Ji1

  • 1Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA, 02115, USA.

Small (Weinheim an Der Bergstrasse, Germany)
|December 19, 2023
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Researchers developed a tough, highly conductive ionogel for advanced energy storage in wearable electronics. This new material offers superior stretchability and ionic conductivity, overcoming key challenges in flexible device design.

Keywords:
ionic conductivityionogelstretchabilitysupercapacitortoughness

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Science

Background:

  • Wearable electronics require energy storage solutions with both high electrochemical performance and mechanical robustness.
  • Ionogels are promising due to their stretchability and ionic conductivity, but optimizing both properties simultaneously is challenging.

Purpose of the Study:

  • To develop a tough and highly ion-conductive ionogel for advanced energy storage applications.
  • To overcome the limitations of current ionogels in balancing mechanical and electrochemical properties.

Main Methods:

  • Fabrication of ionogel using ion impregnation and solvent exchange techniques.
  • Creation of a double interpenetrating polymer network structure crosslinked by hydrogen bonds.
  • Characterization of mechanical properties (stretchability, tensile strength, fracture toughness) and ionic conductivity.

Main Results:

  • The ionogel exhibits excellent mechanical properties: 2600% stretchability, 1.34 MPa tensile strength, and 4175 J m⁻² fracture toughness.
  • Achieved high ionic conductivity of 3.18 S m⁻¹ at room temperature due to high ion concentration and mobility.
  • A supercapacitor demonstrated remarkable areal capacitance (615 mF cm⁻²), energy density (341.7 µWh cm⁻²), and power density (20 mW cm⁻²).

Conclusions:

  • The developed ionogel successfully integrates high mechanical robustness and ionic conductivity.
  • The ionogel-based supercapacitor shows significant potential for high-efficiency, compact energy storage in flexible and wearable electronics.
  • This work provides a pathway for designing advanced ionogels for next-generation electronic devices.