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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 
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B |           　　“可以从外面带吃的(但要给老板尝尝)”“可以喝酒，禁止变身(怕你磕着碰着)”“店里情侣可以亲嘴(老板爱看)……”近日，江苏无锡一家餐厅门口的电子滚屏上，一段超长趣味“店规”意外走红网络。视频播放量突破1500万，点赞超65万，评论近万条。

C |      　　极目新闻记者注意到，这段标语内容总共提到9条店规，完整看完需花费近2分钟的时间。      评论区网友互动      　　有网友留言：“这是我第一次把滚屏里的字一字不落看完。”也有人调侃：“老板高兴地连发7条视频。”还有同城网友晒出地图截图：“我去看看怎么个事。      老板与网友互动      　　面对突如其来的流量，老板本人也现身评论区自嘲：“我真是犯了天条了!我的店竟然是别人给我带火的。”这条评论收获了11.5万点赞。

D |      　　8月26日，老板张先生接受极目新闻记者采访，揭开了这段“魔性店规”背后的故事。

E |      视频点赞超65万      　　张先生坦言，这段视频其实是他用姐姐的账号发布的。

F | “之前在自己的社交账号上也发过，没掀起什么水花。后来看到有路人拍的版本点赞都破了12万，我就想着用姐姐的账号再试一次，没想到直接飙到60多万赞，播放量超过1500万。”所以他才在评论区感叹，谁拍谁火，只有自己发不火。     　　张先生介绍，自己是安徽亳州人，此前做生意被朋友欺骗，亏损惨重，车、房能卖的都卖了，至今仍负债累累。自己一度很消极，但最后还是挺过来了。今年5月，他来到江苏无锡重新开始，开了这家餐厅，因为姐姐和姐夫都在这里，能有个照应，“餐饮行业不好干，但我觉得只要善待每一个人，别人也会善待我。”      评论区网友互动      　　这段走红的标语并非初始版本。张先生透露，最早写的是“情侣来了多少折扣，单身狗来了多少折扣，一个人边吃边哭免费”，反响平平。后来换成了现在的版本，文案其实比最终呈现还要长，“有点啰唆，最后就简化成这样了”。     　　视频爆火后，他的账号涨粉3000多，不少网友专程到店打卡，其中不乏从三亚、广东、浙江远道而来的游客。有社牛顾客看到“可以从外面带吃的(但要给老板尝尝)”，真的主动喊他品尝自己带的美食。

G | 张先生感触最深的是广东网友的热情，“有人说只要来无锡就一定会到我这里打卡，我也表示会给他们包饭，以后有机会也会去广东开店。

H | ”      　　“设计这段标语，其实不是为了吸引客流。”张先生说，“就是希望到店的客人能感到松弛。疲惫了一天，来我们家吃饭能让身体、心情都放松下来，我能给他们带来一点快乐，这就是我的初衷。

I | 只要你足够善待每一个人，当时也许得不到回应，但总有一天，光会照到你身上。”      　　店里的厨师杨师傅表示，自己觉得这条标语挺有趣。他表示，老板是一个很随和、幽默的人。视频火了后，朋友问他“标语是不是老板编的”。他表示，最近确实有不少顾客是看了标语后专程来打卡的。

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