World’s First Breakthrough! China Conquers the "Spontaneous Combustion Chronic Disease" of Sodium-ion Batteries to Completely Block Thermal Runaway
April 22, 2026, Beijing.
The research team led by Hu Yongsheng from the Institute of Physics, Chinese Academy of Sciences, published a landmark achievement in the top international journal Nature Energy. For the first time globally, the team achieved 100% blocking of thermal runaway in ampere-hour level sodium-ion batteries, thoroughly solving the worldwide challenge of battery spontaneous combustion and explosion, and drawing a full stop to new energy safety hazards.
For a long time, thermal runaway has been a fatal pain point for lithium-ion and sodium-ion batteries. Once internal short circuit or overheating occurs, it easily triggers a chain reaction and leads to fire and explosion. The Chinese team independently developed a Polymerizable Non-flammable Electrolyte (PNE), acting as an intelligent firewall for batteries. When the temperature rises above 150°C, the electrolyte automatically transforms from liquid into dense solid, instantly isolating the positive and negative electrodes, cutting off the transfer of heat and energy, and fundamentally eliminating combustion and explosion risks.
This new ultra-safe battery also boasts world-leading overall performance. It operates stably in an extreme temperature range from -40°C to 60°C, adapting to the frigid cold of Northeast China and the scorching heat of South China. Its cycle life exceeds 5,000 times, far outperforming traditional lithium batteries, while the cost is reduced by 30%. It can be massively deployed to replace lead-acid batteries and part of lithium-ion batteries.
Industry experts commented that this breakthrough rewrites global battery safety standards, enabling China to leap from a follower to a global leader in the sodium-ion battery sector. In the next three years, this technology will be widely applied in new energy vehicles, energy storage power stations, electric ships and other fields. It is expected to drive trillion-level industrial upgrading and provide core support for the national dual-carbon goals.