Polymer Engineering Enables High Linear Capacity Fiber Electrodes by Microenvironment Regulation.

Area of Science:

• Materials Science
• Electrochemistry
• Polymer Science

Background:

• Traditional power systems lack flexibility for wearable electronics.
• Fiber batteries offer adaptability but face performance limitations due to ionic transfer and structural challenges.

Purpose of the Study:

• To address limitations in fiber battery performance and energy density.
• To develop high-linear-capacity fiber electrodes with enhanced cycling stability through polymer engineering.

Main Methods:

• Utilized polymer engineering to create crosslink networks, regulating electrode porosity.
• Optimized lithium-ion transfer using ether-abundant polymer chains.
• Enhanced structural integrity via reinforced covalent bonding with carbon nanotube networks.

Main Results:

• Fabricated large-scale, ultrahigh linear-capacity fiber electrodes (17.8 mAh m⁻¹).
• Achieved excellent cycling stability, retaining 92.8% capacity after 800 cycles.
• Demonstrated significant improvements in lithium-ion dynamics and structural stability.

Conclusions:

• Polymer regulation effectively enhances fiber electrode performance and stability.
• The developed fiber electrodes show superiority over existing technologies.
• This work provides new strategies for designing advanced wearable energy-storage systems.