记者19日从中国航天科技集团八院获悉，由八院811所和南开大学科研人员组成的联合团队，近日成功研制出用于高能量密度与低温电池的氢氟烃电解液，标志着我国锂电池核心技术取得新突破，有望使现有锂电池实现续航力成倍提升，耐低温性能明显增强。

On the 19th, a reporter from China Aerospace Science and Technology Corporation's Eighth Institute learned that a joint team composed of researchers from the 811 Institute of the Eighth Institute and Nankai University recently successfully developed a hydrofluorocarbon electrolyte for high energy density and low-temperature batteries. This marks a new breakthrough in China's lithium battery core technology, and is expected to significantly enhance the range and cold resistance of existing lithium batteries.

电解液作为连接锂电池正负极的关键组成部分，在锂电池中起着传导离子的作用，就像正负极之间的一条“高速公路”，对于电池的能量效率、工作稳定性与温度适应性等有着至关重要的作用。

The electrolyte, as a crucial component connecting the positive and negative electrodes of a lithium battery, plays the role of conducting ions within the battery, much like a "highway" between the positive and negative electrodes. It is of vital importance to the energy efficiency, working stability and temperature adaptability of the battery.

当前市场上锂电池的电解液溶剂以氧、氮基配体为主，虽对锂盐溶解性强，却限制了电荷转移，导致能量密度和低温性能提升遇到瓶颈。数据显示，传统锂电池室温能量密度约300瓦时/千克，在零下20℃环境下，能量密度会骤降至150瓦时/千克以下。

Currently, the electrolyte solvents of lithium batteries in the market are mainly composed of oxygen and nitrogen-based ligands. Although they have strong solubility for lithium salts, they limit the charge transfer, resulting in a bottleneck in the improvement of energy density and low-temperature performance. Data shows that the room temperature energy density of traditional lithium batteries is approximately 300 watt-hours per kilogram. At a temperature of -20℃, the energy density drops sharply to below 150 watt-hours per kilogram.

面对行业痛点，联合团队历经多年技术攻关，突破氟无法溶解锂盐等难题，合成出含单氟化烷烃的新型电解液溶剂，其有效降低电解液的黏度、提升氧化稳定性和低温离子电导率，提高高能量密度锂电池的低温能量输出性能。

In response to industry challenges, the joint team has conducted years of technical research and breakthroughs, overcoming problems such as the inability of fluorine to dissolve lithium salts. They have synthesized a new type of electrolyte solvent containing mono-fluorinated alkanes. This new solvent effectively reduces the viscosity of the electrolyte, enhances oxidation stability and low-temperature ionic conductivity, and improves the low-temperature energy output performance of high-energy-density lithium batteries.

据八院811所研究员李永介绍，这项突破性研究成果，可以使锂电池的能量密度在室温环境下大于700瓦时每千克，在零下50℃的环境下仍可达约400瓦时每千克。“同等质量的锂电池，室温储电能力提升2至3倍以上，能将电动汽车续航从五六百公里提升至一千公里甚至更高，且电池在零下70℃的极端低温环境下仍可正常工作。”李永表示。

According to Li Yong, a researcher from the 811 Institute of the 8th Academy, this groundbreaking research achievement enables the energy density of lithium batteries to exceed 700 watt-hours per kilogram at room temperature, and still reach approximately 400 watt-hours per kilogram at -50℃. "For batteries of the same quality, the storage capacity at room temperature can be increased by 2 to 3 times or more, which can increase the driving range of electric vehicles from 500 to 600 kilometers to over 1,000 kilometers or even more, and the batteries can still function normally at the extremely low temperature of -70℃." Li Yong stated.