On December 5, the reporter learned from the Chinese Academy of Sciences Dalian Institute of Chemical Physics that the lithium-ion battery with high specific energy and wide temperature range developed by the team of academician Chen Zhongwei of the institute successfully adapted to the new industrial composite wing UAV designed by the Shenyang Institute of Automation, Chinese Academy of Sciences, and successfully completed the test flight in the airspace of Changhai County, Dalian, Liaoning Province. This test flight demonstrated an important technological breakthrough in the field of UAV power supply by Dalian Institute of Chemical Physics, Chinese Academy of Sciences, and injected strong power into the development of low altitude economy. The high specific energy lithium battery carried by the drone has an energy density of up to 400 watt hours per kilogram, which increases the drone's endurance time by 20% to 40%. The battery module has an energy density of 340 watt hours per kilogram and can operate stably in a wide temperature range of minus 40 degrees Celsius to over 60 degrees Celsius. During the test flight, the drone successfully completed the takeoff, climb, high-speed cruise, landing and other testing stages, and completed a high-quality 3-hour flight test, fully verifying the high-efficiency energy storage capacity and operational stability of the high energy density lithium battery. To achieve such high energy density and meet stringent wide temperature range requirements, the R&D team has made breakthroughs in multiple core technologies. They significantly improved the specific capacity of the battery by innovating the design of high nickel ternary positive electrode materials and optimizing the negative electrode silicon carbon composite; Simultaneously optimized the matching of positive and negative electrode capacities to achieve higher energy storage efficiency; Introducing a special formula of ultra-low temperature electrolyte into low freezing point solvents and functional additives significantly reduces the freezing point, ensuring ion conductivity and charge discharge efficiency at minus 40 degrees Celsius; Developing a new type of composite separator that combines high and low temperature resistance not only enhances the stability over a wide temperature range, but also comprehensively ensures the safety of the battery. In addition, this battery structure design adopts an advanced multi-layer composite strategy, further optimizing thermal management and packaging processes, greatly improving the battery's energy density, cycle life, and temperature adaptability. The successful application of high specific energy wide temperature range lithium batteries provides reliable power support for unmanned aerial vehicles in cold regions, emergency rescue, patrol monitoring and other application scenarios. This not only improves the operational performance and efficiency of drones, but also injects strong impetus into the development of low altitude economy. At the same time, this technology has also opened up vast application space for fields such as electric aviation and high-end equipment manufacturing, helping China's economic transformation and upgrading. (New Society)