Breakthrough in Polymer Electrolyte Technology Enhances Solid-State Battery Performance

Lithium-ion batteries are widely used in smartphones, laptops, and electric vehicles, yet they face challenges regarding charging speed, range, and safety hazards. Polymer-based solid-state batteries are considered a promising direction for early commercialization due to their low cost, good flexibility, and ease of processing.

Recently, a research team at Fuzhou University made progress in the field of polymer electrolytes. By applying the fundamental physics principle of a "built-in electric field," the researchers introduced zinc ions near the oxygen atoms on polymer chains. This reduced the binding force on lithium ions, constructing a lower-resistance pathway for ion transport within the electrolyte.

This design significantly lowers the migration energy barrier for lithium ions, markedly improving the battery's fast-charging capability and cycle life. Test results showed that lithium iron phosphate batteries using this technology retained 84% of their capacity after 5,000 charge-discharge cycles at a 2C rate. This work pioneers a new approach to regulating ion transport through physical fields, providing technical support for the development of safer, higher-performance solid-state batteries.