1. Researchers from Tsinghua University and Zhejiang University have developed a new thermal-switching material for high-capacity lithium-ion batteries (LIBs) to enhance safety and performance across various climates and operating conditions. 2. The material, composed of microspheres between graphene layers, regulates temperature by disrupting heat transport when the microspheres expand in response to temperature changes. 3. Initial tests in a 50 Ah Ni-Co-Mn LIB showed the material effectively prevented heat propagation and potential explosions, indicating potential for widespread commercialization in high-capacity batteries.