On March 23, 2026, a joint research team from the Shanghai Academy of Spaceflight Technology (SAST) and Nankai University announced a significant breakthrough in lithium battery technology with the development of a novel hydrofluorocarbon-based electrolyte. The discovery, published in the journal Nature, addresses long-standing limitations in energy density and thermal stability that have historically constrained the performance of electric vehicles (EVs) and aerospace equipment.
The new electrolyte system utilizes a lithium-fluorine coordination mechanism, replacing the traditional oxygen- and nitrogen-based ligands found in conventional carbonate solvents. According to technical data released by the researchers, this chemical shift significantly reduces the viscosity of the electrolyte while enhancing its oxidative stability. The resulting batteries achieved an energy density exceeding 700 watt-hours per kilogram (Wh/kg) at room temperature. This figure represents more than double the capacity of current industry-standard lithium-ion batteries, which typically peak at approximately 300 Wh/kg.
A critical component of the breakthrough is the battery's performance in extreme environments. Standard lithium batteries often experience a sharp decline in efficiency in cold climates, with energy density frequently falling below 150 Wh/kg at temperatures of -20 degrees Celsius. In contrast, the SAST and Nankai University team reported that their hydrofluorocarbon-based system maintains an energy density of approximately 400 Wh/kg at -50 degrees Celsius. Li Yong, a lead researcher at SAST, stated that the technology allows batteries to operate reliably at temperatures as low as -70 degrees Celsius, making it suitable for polar expeditions and high-altitude aviation.
The implications for the automotive sector are substantial. The research team indicated that the two- to threefold increase in energy storage capacity could extend the driving range of a standard electric vehicle from the current 500-600 kilometer average to over 1,000 kilometers on a single charge. Furthermore, the electrolyte’s improved ionic conductivity supports faster charge transfer, potentially reducing charging times while maintaining safety standards.
Academician Chen Jun, vice-president of Nankai University and a lead coordinator of the project, noted that the team redesigned the electrolyte at the molecular level to improve wettability and ion transport. While the technology is currently in the advanced laboratory and pilot-testing phase, the researchers highlighted its compatibility with existing manufacturing processes. The project was supported by the National Natural Science Foundation of China and is expected to find early applications in the low-altitude economy, including heavy-lift drones and electric vertical takeoff and landing (eVTOL) aircraft, before transitioning to the mass EV market.