High-power lithium ion microbatteries from interdigitated three-dimensional bicontinuous nanoporous electrodes

Area of Science:

• Materials Science
• Electrochemistry
• Microengineering

Background:

• Miniature power sources are crucial for advancing microelectronic systems.
• Existing microbatteries often lack sufficient power density for demanding applications.
• Supercapacitors offer high power but limited energy storage.

Purpose of the Study:

• To develop high-performance lithium ion microbatteries.
• To achieve power densities comparable to or exceeding supercapacitors.
• To explore a novel microarchitecture for enhanced power delivery.

Main Methods:

• Fabrication of lithium ion microbatteries with a three-dimensional bicontinuous interdigitated microelectrode architecture.
• Characterization of power and energy densities.
• Analysis of ion and electron transport within the microbattery structure.

Main Results:

• Achieved power densities up to 7.4 mW cm(-2) μm(-1), surpassing existing microbatteries by 2,000 times.
• Demonstrated power density equal to or greater than state-of-the-art supercapacitors.
• The 3D microarchitecture concurrently optimized ion and electron transport.

Conclusions:

• The developed lithium ion microbatteries offer a high-performance power source for microelectronics.
• The novel microarchitecture enables significant improvements in power delivery.
• The design is scalable to larger areas, indicating broad applicability.