Fiber-shaped aqueous dual-ion batteries integrating rectification and synaptic functions.

Area of Science:

• Materials Science
• Electronics Engineering
• Energy Storage

Background:

• Wearable electronics demand integrated fabric systems for energy storage, signal rectification, and neuromorphic computing.
• Integrating diverse functionalities into single fibers faces material compatibility and operational challenges.

Purpose of the Study:

• To present novel fiber-shaped aqueous dual-ion batteries (FADIBs) as a unified platform for multifunctional integration.
• To demonstrate the capability of FADIBs in energy storage, ionic rectification, and synaptic emulation.

Main Methods:

• Fabrication of FADIBs using a CuHCF/CNTF cathode, Ag/CNTF anode, and NH4Cl/PVA gel electrolyte.
• Characterization of FADIBs for energy density, ionic rectification ratio, and synaptic behavior.

Main Results:

• Achieved a high energy density of 51.5 mWh cm⁻³ and an ionic rectification ratio up to 109.
• Demonstrated artificial synaptic behavior with ultra-low energy consumption (7.5 fJ per event).
• Successfully integrated FADIBs into fabric modules for energy harvesting, power supply, and electrochromic regulation.

Conclusions:

• FADIBs provide a foundational technology for multifunctional integration in fabric systems.
• This work offers insights for future fabric systems unifying energy management, perception, and information processing.