Solid polymer could power safer EVs, drones, and space probes

Researchers at Florida State University’s FAMU-FSU College of Engineering have developed a novel polymer blend that could lead to safer, longer-lasting solid-state batteries for smartphones, electric vehicles (EVs), drones, and space probes. By combining polyethylene oxide (PEO), a polymer commonly used in lithium-ion batteries for its ionic conductivity and mechanical strength, with a specially designed charged polymer called p5, the team demonstrated that even small amounts of charge significantly influence how polymers mix. Their experiments showed that low concentrations of p5 result in phase separation, while higher p5 content produces a stable, uniform blend. This finding validates theoretical models predicting polymer behavior and identifies key temperature thresholds for maintaining blend stability. The study’s insights into charge concentration and electrostatic interactions provide crucial levers for tuning polymer properties, enabling faster design and screening of advanced battery materials without extensive trial and error. This advancement is particularly promising for solid-state lithium metal batteries, which use solid electrolytes instead of flammable liquid ones, offering enhanced