Battery breakthrough unlocks secrets to more EV range, longer life

Researchers at Tohoku University have developed a breakthrough in lithium-ion battery anode technology by stabilizing fullerene (C60) molecules through a covalently bridged framework called Mg4C60. This novel material uses magnesium atoms to create strong intercage connections, transforming the fullerene from a fragile molecular solid into a robust layered polymeric structure. This design prevents the dissolution and structural collapse that previously limited fullerene use in batteries, enabling reversible lithium storage without degradation. Unlike graphite anodes, which face limitations such as slow charging rates and lithium plating risks, Mg4C60 offers a stable alternative that could support ultra-fast charging and higher energy density. The study demonstrates that the Mg4C60 framework maintains its integrity during lithium insertion and extraction, showing electrochemical behavior similar to soft carbon but with enhanced stability. This advancement points to longer battery lifetimes and improved safety, with potential applications in electric vehicles, consumer electronics, and renewable energy storage. The research team plans to extend this covalent