天涯明月刀

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

一 |     

    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 
。    示意图。（图：iStock）23岁青年找借口把女友带回家关住房门持刀威胁向她索性非礼，女友坚持不从后更差点持刀伤她，所幸最后克制住自己放女友离开，而自己则在三天后主动自首，今早因威胁恐吓等罪共被判坐牢三年又20周和打鞭六下。

二 | 根据法庭文件，受害者22岁，23岁被告，两人曾是情侣，为保护受害者，媒体不可报道任何可泄露她身份的资料，包括被告的名字。被告面对七项刑事恐吓、威胁散播不雅内容和非礼等罪，控方以其中四项加以提控，另外三项交由法官下判时纳入考量。以曝光裸照威胁带受害者回家 案情显示，去年5月4日晚上10点30分，被告到校门外等女友称听到有关两人的谣言需要找受害者谈话，女友以为是去用餐聊天，就跟着被告坐上一辆私召车离去。途中，女友发现车子开往被告住家，吵着要下车，被告威胁要把早前拍下她的裸照发给她的父亲，女友最终妥协跟他回家。在电梯里，被告直接亮出随身携带的刀子，威胁女友必须跟着他，女友出于害怕最后跟进他的家门。

三 | 持刀威胁索性非礼 刚进房间，被告直接收走女友的手机防止她致电求救。但女友在房里不理不睬他约一个小时，被告生气取出菜刀指着女友向她索性，女友不肯，被告把女友推倒在床上，掀开她的衣服亲吻非礼她。女友受辱哭泣，被告心软想放她回家，但随即改变主意强行要求她口交和替他打手枪，女友依然不从。被告盛怒之下一把推倒女友，抓起菜刀朝她挥舞，女友喝止他的行为，被告冷静后也担心吵醒同住的祖母，最终克制住自己，把手机还给女友放她离开。被告三天后主动到警局自首，连带坦诚自己涉及毒品相关法令，他之后被送进戒毒所至今。

Current article:http://3xcx3d.gaxuexiazengpian.pics/ggybwp9/q8wzv8.html

Published on:20:05:59