佩小姐的奇幻城堡
Chinese researchers develop new lithium battery withstanding - 40 C with both long endurance and explosive strength_我的网站
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北京时间4月21日零点，费内巴切主场3-3战平开赛利体育，在主场错失三分，失去争冠与直接晋级欧冠的主动权。
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
。曾为穆鸟做过专访的土耳其记者Gürcan Bilgiç认为：穆里尼奥固然能为每场失利找到托词，但此役过后，他该做的只剩签署辞职信了。
该记者写道："这哪是普通比赛...我们目睹了一场充满宿命感的对决。面对缺兵少将、深陷降级区的开塞利体育，坐镇卡迪柯伊主场的费内巴切竟未能突破对方的钢铁防线。这90分钟俨然成为整个赛季的缩影——他们先是提前宣告争冠终结，又在补时阶段彻底投降。”
“事实上，这正是球队本赛季的集中写照：领先后痛失好局的戏码反复上演，而症结总在于将控球权拱手相让后消极退守。穆里尼奥固然能为每场失利找到托词，但此役过后，他该做的只剩签署辞职信了。
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