-German scientists unravel the mystery of lithium battery aging

German scientists unravel the mystery of lithium battery aging
author:enerbyte source:本站 click86 Release date: 2024-08-08 11:00:32
abstract:
Recently, a German research team discovered the key to capacity loss in lithium-ion batteries and hopes that the research results can provide direction for more efficient battery manufacturing.Scientists from the Technical University of Munich in Germany have found that the active lithium in a singl...

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Recently, a German research team discovered the key to capacity loss in lithium-ion batteries and hopes that the research results can provide direction for more efficient battery manufacturing.

Scientists from the Technical University of Munich in Germany have found that the active lithium in a single battery is slowly consumed in various side reactions with temperature changes - the effect is relatively weak at 25 ℃, but quite strong at 60 ℃.

Although lithium-ion batteries with graphite anodes were only patented in 1989, they have become an important part of mechanical operations ranging from small electronic devices to cars and trains.

But the important weakness of lithium-ion batteries - the aging of the potential capacity of the battery, has not been fully understood by people until now.

Lithium ion batteries with graphite anodes experience their first significant capacity loss during the first charge, with a loss rate of up to 10%. In addition, each charge discharge cycle further reduces the storage capacity, although only a small amount is lost each time. Meanwhile, capacity can also be lost during simple battery storage, especially when stored in environments above room temperature.

Scientists at the Technical University of Munich in Germany have discovered that significant capacity loss during the formation process is caused by the accumulation of a calming layer on the anode. This consumes active lithium, but also protects the electrolyte from decomposition at the anode. Battery manufacturers have determined the optimal relationship between electrode materials and lithium through experiments, according to researchers.

Now, by using our results, every process can be improved, "said Irmgard Buchberger, a postdoctoral student in the Department of Electronic Chemistry at the Technical University of Munich in Germany. For example, its possibilities include additives that enhance the accumulated calming layer or modifications on the cathode surface


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