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

A |     　　石嘴山8月25日电 (记者 于晶)8月25日，2026宁夏民营企业100强发布会暨宁夏优强民营企业助推石嘴山高质量发展大会在石嘴山市召开，现场正式揭晓“2026宁夏民营企业100强榜单”与“2026宁夏制造业民营企业100强榜单”，宁夏天元锰业集团有限公司、宁夏宝丰集团有限公司、宁夏宁鲁石化有限公司登上民营企业百强榜单前三席位。　　据悉，这是宁夏第五次开展民营企业百强调研发布工作。本次榜单坚持企业自愿申报原则，历经组织动员、自主申报、数据整理、信用核查、综合评议等多个环节，以企业2025年度营业收入总额为核心依据排序生成民营企业百强榜单；制造业百强榜单，则按照企业2025年度制造业板块营业收入进行排位。　　数据显示，2026宁夏民营企业100强入围门槛达5.05亿元，共有20家企业首次登上百强榜单。    

    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 
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B | 百强企业营收总额达3529.97亿元，户均营收35.30亿元，较上年分别增加291.01亿元、2.91亿元，两项指标增幅均达到8.98%；资产总额4697.59亿元，税后净利润总额204.29亿元。从营收梯队来看，营收超百亿元企业5家，50亿元‑100亿元企业5家，10亿元‑50亿元企业49家，头部企业引领作用突出，中坚企业队伍持续壮大。　　同步出炉的2026宁夏制造业民营企业100强，入围门槛为2.55亿元；百强制造业民企营收总额2656.01亿元，户均营收26.56亿元；资产总额4076.71亿元，户均资产40.77亿元；净利润总额175.33亿元，户均净利润1.75亿元，制造业民营经济底盘稳固，发展根基厚实。

C | 　　宁夏工商联相关负责人表示，宁夏民营企业百强是全区民营经济发展的第一方阵和中坚力量。从本次调研结果来看，百强民企质量效益、产业结构持续优化，自主创新能力、现代化企业治理水平不断提升，大型龙头企业发展势头稳健，越来越多民营企业主动扛起社会责任，积极投身中国式现代化宁夏建设实践，为宁夏经济社会高质量发展注入源源不断的民营动能。

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Published on:06:24:21