Game-changing solid battery material moves ions as fast as liquid

Scientists at the University of Oxford have developed a novel class of organic materials called state-independent electrolytes (SIEs) that maintain high ionic conductivity even after solidifying, challenging the long-held electrochemical principle that ion movement slows drastically when a liquid electrolyte solidifies. These SIEs enable ions to move through solid structures as quickly as they do in liquid form, overcoming the "freezing out" effect that has hindered the performance of solid-state batteries compared to their liquid-based counterparts. The key innovation lies in the molecular design: disc-shaped molecules with flexible sidechains stack into rigid columns while their "soft bristles" create a permeable environment, allowing negative ions to flow freely through the solid matrix. This breakthrough offers significant advantages for battery manufacturing and safety. The electrolyte can be heated and poured as a liquid to thoroughly infiltrate battery electrodes, then cooled to form a stable solid that eliminates leakage and fire risks typical of liquid electrolytes, all without sacrificing performance. Due to their lightweight, flexible