High-performance flexible transparent micro-supercapacitors from nanocomposite electrodes encapsulated with solution...

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Two-dimensional molybdenum disulfide (MoS₂) nanosheets are promising for transparent, flexible micro-supercapacitors.
• Poor electrical conductivity and restacking of MoS₂ hinder electrode performance.
• Novel electrode architectures are needed to overcome these limitations.

Purpose of the Study:

• To develop a novel electrode architecture for MoS₂-based micro-supercapacitors.
• To improve the electrochemical activity, conductivity, and cycling stability of MoS₂ electrodes.
• To realize high-performance, flexible, and transparent energy storage devices.

Main Methods:

• Electrochemically exfoliated MoS₂ dispersion was spin-coated onto silver networks.
• A flexible conducting film encapsulated the MoS₂-coated silver network.
• The composite electrode was tested in a symmetric cell with 3 M KOH solution.

Main Results:

• The composite electrode exhibited pseudocapacitive behavior and high electrochemical activity.
• Achieved large areal capacitance (89.44 mF cm^-2 at 6 mA cm^-2) and high energy/power densities (12.42 µWh cm^-2, 6043 µW cm^-2).
• Demonstrated high optical transmittance (~80%) and stability under mechanical bending and cycling.

Conclusions:

• The novel electrode architecture effectively addresses MoS₂ restacking and conductivity issues.
• The developed flexible micro-supercapacitors offer excellent performance and durability.
• This technology is suitable for powering electronics in flexible and transparent applications.