China's new EV battery could double range to 600+ miles, survive -94°F temp

A research team from Nankai University and the Shanghai Institute of Space Power-Sources in China has developed a novel fluorine-based hydrofluorocarbon electrolyte for lithium-metal batteries that significantly enhances energy density and performance in extreme temperatures. Their batteries demonstrated more than double the energy density of conventional lithium batteries at room temperature—exceeding 700 Wh per pound compared to about 136 Wh per pound for standard designs—and maintained substantial capacity even at temperatures as low as minus 94°F. This breakthrough could potentially extend electric vehicle (EV) ranges from the current 310–370 miles to approximately 620 miles on a single charge, while also benefiting other devices like drones, smartphones, and robots. Traditional lithium battery electrolytes, typically based on oxygen- and nitrogen-containing compounds, face limitations such as reduced charge transfer efficiency under stress, slower charging, diminished cold-weather performance, and safety concerns. The new fluorine-based electrolyte offers lower viscosity, improved stability, and enhanced cold-weather operation, maintaining around