en.Wedoany.com Reported - On April 6th, a team led by Hu Yongsheng from the Institute of Physics, Chinese Academy of Sciences, published a significant achievement in Nature Energy: The team successfully developed a polymerizable nonflammable electrolyte (PNE) with self-protection functionality, achieving, for the first time globally, the complete blocking of thermal runaway in ampere-hour-level sodium-ion batteries.

By constructing a protective system integrating "thermal stability, interface stability, and physical isolation," Hu Yongsheng's team has shifted away from the single-logic approach of traditional flame-retardant solutions. Experimental data show that when the internal temperature of the battery abnormally rises above 150°C, this electrolyte automatically transforms from a liquid state into a dense solid barrier. This mechanism can cut off the propagation path of thermal runaway within milliseconds, building an intelligent firewall inside the battery and significantly enhancing the inherent safety of the system.

While maintaining high safety, this sodium-ion battery safety technology also ensures high-performance output. Test results indicate that the battery operates within a wide temperature range of -40°C to 60°C and supports high-voltage stability above 4.3V. Since the raw materials used are all mature industrial products, this technology demonstrates strong competitiveness in production cost control and supply chain compatibility, clearing technical barriers for large-scale industrial application.

This achievement reshapes the understanding of battery safety and lays a solid foundation for the commercialization of sodium-ion batteries in fields such as electric vehicles, heavy-duty trucks, and large-scale energy storage.

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