High-Performance Biodegradable Energy Storage Devices Enabled by Heterostructured MoO₃ -MoS₂ Composites.

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Biodegradable implantable devices are crucial for biosensors and bioelectronics.
• A significant challenge is the need for reliable, biodegradable power sources.
• Existing power solutions often lack biocompatibility or biodegradability.

Purpose of the Study:

• To synthesize and characterize 2D heterostructured MoO₃-MoS₂ nanosheet arrays for biodegradable energy storage.
• To demonstrate the application of these materials in various biodegradable electrochemical devices.
• To address the power supply challenge for biodegradable electronics.

Main Methods:

• Synthesis of 2D heterostructured MoO₃-MoS₂ nanosheet arrays on water-soluble Mo foil.
• Fabrication and testing of symmetric supercapacitors, asymmetric Zn-ion hybrid supercapacitors, and Mg primary batteries using the synthesized materials.
• Evaluation of electrochemical performance, including areal capacitance, energy density, and output voltage.

Main Results:

• Achieved a high areal capacitance of 164.38 mF cm^-2 (at 0.5 mA cm^-2) for MoO₃-MoS₂ electrodes.
• Demonstrated high performance in Zn-ion hybrid supercapacitors (181.86 mF cm^-2, 30.56 µWh cm^-2) and Mg primary batteries (≈1.6 V).
• All fabricated devices exhibited desirable biocompatibility and full biodegradability.

Conclusions:

• The developed MoO₃-MoS₂ heterostructure is a promising material for biodegradable energy-storage devices.
• These devices offer a viable solution for powering biodegradable electronics and implantable systems.
• The study highlights the potential of these materials for next-generation biocompatible and biodegradable power sources.