On-chip integrated vertically aligned carbon nanotube based super- and pseudocapacitors

Area of Science:

• Materials Science
• Electrical Engineering
• Nanotechnology

Background:

• On-chip energy storage is crucial for advanced electronic platforms and integrated circuits.
• Stand-alone energy storage elements like supercapacitors are progressing on various substrates.
• Developing integrated energy solutions is key for portable and autonomous devices.

Purpose of the Study:

• To demonstrate on-chip energy storage using highly aligned vertical carbon nanotubes (CNTs).
• To enhance the capacitance of these CNT-based supercapacitors by incorporating pseudocapacitive materials.
• To assess the scalability and compatibility of the developed energy storage with standard manufacturing processes.

Main Methods:

• Fabrication of on-chip energy storage devices using highly aligned vertical carbon nanotubes (CNTs).
• Incorporation of electrochemically active manganese oxide (MnOₓ) nanoparticles to create pseudocapacitive architectures.
• Characterization of device capacitance and areal specific capacitance.

Main Results:

• Demonstrated on-chip energy storage architectures based on CNTs functioning as supercapacitors.
• Achieved enhanced device capacitance through the integration of MnOₓ nanoparticles, forming pseudocapacitive structures.
• Obtained an areal specific capacitance of 37 mF/cm².

Conclusions:

• The developed on-chip energy storage is scalable and compatible with standard CMOS processes.
• This lightweight energy storage solution offers significant advantages for portable and autonomous electronic devices.
• The integration of CNTs and MnOₓ nanoparticles presents a promising approach for next-generation integrated electronics.