Our country has made a major breakthrough in sodium-ion batteries.

The team led by Hu Yongsheng from the Institute of Physics of the Chinese Academy of Sciences published a major breakthrough in "Nature Energy": the team successfully developed a self-protecting aggregable non-flammable electrolyte, and for the first time globally achieved complete suppression of thermal runaway in a ten-hour sodium-ion battery. The team broke the traditional understanding that "flame-retardant electrolyte equals safety", and instead of relying solely on a single defense line, they built a three-in-one intelligent safety protection system of "thermal stability-interface stability-physical isolation". When the temperature of the battery abnormally rises above 150C, the PNE will automatically solidify from liquid to dense barrier, like building an "intelligent fire wall" inside the battery, completely cutting off the pathway of thermal runaway propagation. It is worth mentioning that this breakthrough did not sacrifice the high performance of the battery. The battery has excellent wide-temperature performance and high-voltage stability, and the materials are mature industrial products, providing a high competitive advantage for industrialization. This achievement has reshaped people's understanding of battery safety and laid a solid foundation for the commercialization of sodium-ion batteries in electric vehicles, heavy-duty trucks, large-scale storage, and other fields.