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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 
。    北京时间8月22日，今天克莱被独行侠买断之后，他将加盟热火，虽然克莱没有了巅峰但是他的投射和经验可以帮助到热火，而且热火足够多的防守资源也能够掩盖克莱端的不足，现在随着克莱的加盟，整个东部更乱了，今天美媒预测平台预测了东部冠军的概率，我们一起来看看史上最乱东部都是那些球队被看好。         步行者是7%，虽然下赛季哈利伯顿将会回归，但特纳的离队，以及祖巴茨没有空间能力，可能会影响到步行者的化学反应，加上哈利回归之后也不会立马全力以赴，他需要负荷管理、寻找状态，所以步行者有机会，但不是第一梯队了。

二 |          活塞是7%，活塞相比于上赛季的实力实际上是下滑了，因为他们失去了斯图尔特和哈大哥，而且杜伦能否留队还不好说，不过有坎宁安和他们的防守体系兜底，这支球队常规赛依旧是很强，但是想要在季后赛取得成功，现在的阵容恐怕不行。         骑士是7%，尽管骑士拿下了沃特森，结果他们还是不被看好，说实话我认为骑士这个概率低了，但他们也确实距离真正一线的强队有差距，因为哈登又老了一岁而且米切尔到了硬仗容易被针对，莫布里还很软。         热火是8%，热火拿下字母哥之后，说实话有些后劲不足了，他们之后的引援并不出色，球队没有一个关键时刻可以攻坚的球员，如果球队舍得，能够换来欧文，那么他们这阵容就完美了，现在8%算是比较合理了。

三 |          猛龙是10%，猛龙只要得到伦纳德，他们就会跻身顶级豪强之列，球队拥有巴恩斯、奎克利、巴雷特和博伊尔斯这些出色的球员，已经让他们拥有了足够的天赋和下限，球队现在就缺一个伦纳德这种阵地战的大杀器。         绿军是13%，说实话绿军可能被高估了，他们拿下乔治之后，球队看起来天赋不如以前了，这支球队靠着他们的体系，常规赛战绩差不了，但是到了季后赛，谁来硬解？或许史蒂文斯在交易截止日会换来合适的球星，助队冲冠。

四 |          尼克斯是22%，尼克斯仅排在第二，估计很多球迷已经猜到第一是谁了，说实话我认为这对于尼克斯来说不公平，因为人家尼克斯已经证明了他们可以取得成功，在这样的情况下，让一支纸面实力出色的豪阵，排在他们前面，看起来一点也不公平，我甚至觉得这个预测公司在搞噱头。

五 |          76人是23%，76人确实只看纸面实力他们是联盟最强，甚至可以说每个位置面对尼克斯都不虚，而且多个位置还有优势，但在NBA里就不能只看纸面实力，76人如果能够保持健康，却找到化学反应，他们确实是东部最强，但恩比德的健康或许会成为他们冲冠的隐患，都想夺得总冠军，但想要夺冠，除了实力，运气、健康也不可或缺。         大家对于这次美媒的预测有什么想说的？欢迎留言讨论。

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Published on:10:35:47