Self-Standing Metallic Mesh with MnO₂ Multiscale Microstructures for High-Capacity Flexible Transparent Energy...

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Flexible transparent electronics require efficient energy storage solutions.
• Current flexible transparent supercapacitors face limitations in energy storage capacity due to transparency demands.

Purpose of the Study:

• To develop high-capacity flexible transparent supercapacitor electrodes.
• To investigate a core-shell electrode structure for improved performance.

Main Methods:

• Morphology-controlled electrodeposition of manganese dioxide (MnO2) onto a self-standing flexible transparent metallic nickel (Ni) mesh.
• Fabrication of a symmetric solid-state supercapacitor device.

Main Results:

• Achieved a flowerlike multiscale microstructure of MnO2 nanosheets on the Ni mesh core.
• The electrode demonstrated an areal capacitance of 1.15 F/cm² at 69.4% optical transmittance.
• The supercapacitor device showed high areal capacitance (78.46 mF/cm²), excellent cycling stability, optical transmittance, and mechanical flexibility.

Conclusions:

• The core-shell metal oxide mesh electrode design synergistically enhances ionic and electronic transport for high performance.
• This approach offers a promising pathway for creating advanced high-capacity flexible transparent supercapacitors and solid-state devices.