On the 19th, it was learned from the Eighth Academy of China Aerospace Science and Technology Corporation that a joint team composed of 811 institutes and researchers from Nankai University has successfully developed a hydrogen fluorine hydrocarbon electrolyte for high-energy density and low-temperature batteries, marking a new breakthrough in China's core technology of lithium batteries. It is expected to double the endurance and significantly enhance the low-temperature resistance of existing lithium batteries. Electrolyte, as a key component connecting the positive and negative electrodes of lithium batteries, plays a role in conducting ions in lithium batteries, just like a "highway" between the positive and negative electrodes. It plays a crucial role in the energy efficiency, working stability, and temperature adaptability of the battery. The current electrolyte solvents for lithium batteries in the market are mainly oxygen and nitrogen based ligands. Although they have strong solubility for lithium salts, they limit charge transfer, resulting in bottlenecks in improving energy density and low-temperature performance. Data shows that the energy density of traditional lithium batteries at room temperature is about 300 watt hours per kilogram, and in an environment of minus 20 ℃, the energy density drops sharply to below 150 watt hours per kilogram. In the face of industry pain points, the joint team has gone through years of technological breakthroughs, breaking through difficulties such as the inability of fluorine to dissolve lithium salts, and synthesizing a new type of electrolyte solvent containing monofluorinated alkanes. It effectively reduces the viscosity of the electrolyte, improves oxidation stability and low-temperature ion conductivity, and enhances the low-temperature energy output performance of high-energy density lithium batteries. According to Li Yong, a researcher at the 811 Institute of the Eighth Academy, this breakthrough research achievement can make the energy density of lithium batteries greater than 700 watt hours per kilogram at room temperature, and still reach about 400 watt hours per kilogram at minus 50 ℃. Li Yong said, "Lithium batteries of the same quality can increase their room temperature storage capacity by more than 2 to 3 times, and can increase the range of electric vehicles from five to six hundred kilometers to one thousand kilometers or even higher. Moreover, the battery can still work normally in extreme low temperature environments of minus 70 ℃. (New Society)