正义的伙伴

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

A |     

    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 
。    Danish National Bank Governor Lars Rohde has stated that the Nordic country's economy is threatened by a “vicious spiral” due to “dangerous cocktail” of rising prices on staples from bread to petrol and electricity, as well as higher wages.,According to Rohde, it is necessary for the nation to tighten fiscal policy. Unless the parliament puts a damper on the economy, it is bound to get worse, he said. Rohde estimated that total demand must be slashed by around 1 percent of the GDP.,“If demand is not limited, there is an imminent danger that we will get what we fear most: a wage and price spiral”, Rohde said, as quoted by TV2.,Rising prices lead to higher wages, which, in turn, spurs even higher prices and thus even more inflation.,According to Rohde, the sooner the tightening of the fiscal policy is announced, the better. This, he ventured, would put the pressure off the labor market.,If high inflation and rising wages come to stay, the Danish economy could face a severe economic downturn, he warned.,“It will have a very negative effect if inflation and wage growth rates remain high. But the period when you want to knock inflation down again – once it has taken hold – is painful and will probably be associated with a sharp recession”, Lars Rohde concluded.,According to Statistics Denmark, consumer prices in May were 7.4 percent higher than they were a year previously, which is the highest 12-month inflation recorded in nearly four decades, since 1983.,Inflation in Sweden Hits Highest Rate in Over 30 Years16 June, 05:32 GMT,Denmark's Nordic peers have landed in similar situations and are also witnessing levels of inflation unseen in decades. Swedish Finance Minister Damberg warned that tough times are ahead for the Swedish economy, with growth expected to slow down in the second half of the year, due to high inflation and rising interest rates.。

Current article:http://uqwfsb.taokenlaichunlei.bond/7fc9l/35u.html

Published on:03:17:04