PVTIME – A team from the Institute of Physics at the Chinese Academy of Sciences has developed a non-flammable, self-protective polymerisable electrolyte identified as PNE. This electrolyte delivers the world’s first complete prevention of thermal runaway in ampere-hour scale sodium-ion batteries. This breakthrough was published in Nature Energy on 6 April by the research group led by Hu Yongsheng.
This development challenges the traditional belief that flame-retardant electrolytes ensure safety, instead establishing a three-part intelligent safety system that combines thermal stability, interfacial stability, and physical isolation. Above 150°C, PNE converts from a liquid to a solid barrier, halting the propagation of thermal runaway.
The battery retains its performance across a wide temperature range of -40°C to 60°C and remains stable above 4.3 V. This is supported by industrially mature materials that ensure strong commercial viability.
Zhongke Haina Technology will deploy the technology in ampere-hour scale sodium-ion batteries, supporting its commercial use in electric and heavy goods vehicles, as well as in large-scale energy storage systems.
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