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Chinese researchers develop new lithium battery withstanding - 40 C with both long endurance and explosive strength_我的网站

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    Different types of consumer lithium primary batteries on display Photo: VCGChinese researchers have developed a new high-energy lithium primary battery that can deliver both long-lasting energy and strong bursts of power while maintaining stable performance at temperatures as low as -40 C, Science and Technology Daily reported on Monday.
A research team led by Chen Zhongwei at the Dalian Institute of Chemical Physics under the Chinese Academy of Sciences developed a 25-ampere-hour pouch-type lithium-metal primary battery. Tests conducted by the safety laboratory of the China Electronics Standardization Institute showed that the battery achieved an energy density of more than 750 Watt-hour per kilogram at a low discharge rate, according to the report.
Meanwhile its discharge rate can be increased by up to 100 times, enabling short bursts of high-current discharge at 10C. The "C" stands for C-rate, which is the charge and discharge rates of a battery. According to sector website Battery University, the capacity of a battery is commonly rated at 1C, meaning that a fully charged battery rated at 1Ah should provide 1A for one hour. The same battery discharging at 0.5C should provide 500mA for two hours, and at 2C it delivers 2A for 30 minutes. 
The new battery puts China among the world's leading players in high-power primary battery technology.
Primary batteries offer high specific energy, long storage times and instant readiness, allowing them to be used immediately even after long storage. 
Primaries play an important role, especially when charging is impractical or impossible, such as in military combat, rescue missions and forest-fire services, the article said. 
Traditional lithium primary batteries can store large amounts of energy for long periods, but their ability to rapidly release that energy can be limited. The new battery is designed to combine high energy density with high power output, allowing it to both operate for extended periods and provide large amounts of power when needed.
The battery can deliver short bursts of high-current discharge at up to 10C and sustain discharge at 4C. At room temperature, its specific power reaches 4,487 Watts per kilogram, according to Science and Technology Daily.
The battery also maintains strong performance under extremely cold conditions. At -40 C, the battery retains an energy density of 447 Watt-hour per kilogram at a 1C discharge rate. Its annual self-discharge rate is below 1 percent, meaning that it loses relatively little stored energy during long periods of standby.
Such characteristics could make the battery suitable for equipment that needs both long-term energy storage and sudden high-power output, including drones, robots, spacecraft and sensors deployed in remote areas.
Chen said the team achieved a breakthrough in cathode materials by developing a high-entropy oxide material and has established a pilot production line with an annual capacity of 10 tons, linking material development with battery-cell production.
The battery has passed third-party testing and is now undergoing further validation for applications including drones, robots, spaceflight simulators and field sensor nodes, according to Chen.
Global Times 
。    　　讯 国家移民管理局8月20日发布公告，自2026年8月20日起，吉尔吉斯斯坦、越南公民可适用240小时过境免签政策和海南30天入境免签政策来华，240小时过境免签政策适用国家增至57国，海南30天入境免签政策适用国家增至61国。　　吉尔吉斯斯坦、越南公民持普通护照和确定日期及行程的联程客票，从中国过境前往第三国或地区，可从北京、上海等65个对外开放口岸免签入境，并在规定区域内免签停留不超过240小时。两国公民持普通护照可由海南省对外开放口岸入境，在海南省行政区域内免签停留不超过30天。适用上述2项免签政策停留期间可从事旅游、商贸、访问、探亲等短期活动，工作、学习、新闻采访等需事先批准的活动仍应在来华前办妥签证。　　据国家移民管理局相关负责人介绍，对吉尔吉斯斯坦、越南公民实施2项免签政策，是稳步推进高水平对外开放、推动构建周边命运共同体的务实举措，有利于进一步促进双方互信合作，推动旅游商贸、访问投资更加便利高效。下一步，国家移民管理局将统筹发展和安全，坚决维护规范有序的出入境管理秩序，更好促进中外人员往来和国际交流合作，服务国家高水平开放高质量发展。版权申明：凡注有“”或电头为“”的稿件，均为独家版权所有，未经许可不得转载或镜像；授权转载必须注明来源为“”，并保留“”的电头。    。

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