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Alkali-Resistant Quasi-Solid-State Electrolyte for Stretchable Supercapacitors.

Qianqiu Tang1, Wenqiang Wang1, Gengchao Wang1

  • 1Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology , Shanghai 200237, China.

ACS Applied Materials & Interfaces
|September 24, 2016
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel stretchable, alkali-resistant electrolyte for elastic electronics. This new material, POE@KOH-PAAK, demonstrates excellent durability and conductivity for advanced energy-storage devices.

Keywords:
alkaline-resistantpolyacrylatestretchable electrolytesupercapacitor

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Science

Background:

  • Stretchable energy-storage devices are crucial for elastic electronics.
  • Development of stretchable electrodes has advanced, but stretchable electrolytes, especially alkali-resistant ones, remain underdeveloped.
  • Alkali-resistant electrolytes are essential for devices operating in harsh chemical environments.

Purpose of the Study:

  • To report a novel stretchable and alkali-resistant electrolyte.
  • To characterize the mechanical and electrochemical properties of the new electrolyte.
  • To demonstrate the potential application of the electrolyte in stretchable supercapacitors.

Main Methods:

  • Fabrication of a stretchable alkali-resistant electrolyte using a polyolefin elastomer porous membrane supporting potassium hydroxide-potassium polyacrylate (POE@KOH-PAAK).
  • Mechanical testing involving 1000 stretching cycles at 150% strain.
  • Electrochemical testing to determine conductivity and alkali resistance (immersion in 2 M KOH for 2 weeks).
  • Assembly and testing of a stretchable supercapacitor using CNT@NiCo2O4 and CNT@Fe2O3 electrodes.

Main Results:

  • The POE@KOH-PAAK electrolyte exhibited negligible plastic deformation after 1000 stretching cycles at 150% strain.
  • A high ionic conductivity of 0.14 S cm⁻¹ was achieved.
  • The electrolyte demonstrated excellent alkali resistance, with no significant degradation after 2 weeks in 2 M KOH.
  • A stretchable supercapacitor assembled with this electrolyte showed high performance.

Conclusions:

  • A novel stretchable, alkali-resistant electrolyte (POE@KOH-PAAK) has been successfully developed.
  • The electrolyte possesses excellent mechanical stability, high conductivity, and superior alkali resistance.
  • This material shows significant promise for applications in high-performance stretchable energy-storage devices.