EVs can get 2.8x more range, 3x battery life with oxygen bodyguard gel

Researchers at the Ulsan National Institute of Science and Technology (UNIST) have developed a novel gel polymer electrolyte (GPE), named An-PVA-CN, that could significantly enhance electric vehicle (EV) battery performance by increasing driving range by 2.8 times and extending battery life nearly threefold. Traditional lithium-ion batteries face challenges at high voltages (above ~4.4 V), where nickel-rich cathodes release surface oxygen that forms reactive oxygen species (ROS). These ROS degrade the electrolyte, damage cathode structure, cause nickel dissolution, and generate gas that swells batteries, increasing failure risk and shortening lifespan. The new gel electrolyte addresses these issues with a dual protection mechanism: anthracene molecules bind to unstable surface oxygen to prevent ROS formation and also scavenge any ROS already present, neutralizing them before damage occurs. Additionally, nitrile groups in the polymer bind to nickel ions, preventing their dissolution and maintaining cathode structural integrity. This results in reduced cracking, degradation