British researchers wrote in the latest issue of Nature Materials Science that they have found a simple and accurate way to monitor the ongoing chemical reactions in lithium batteries and to detect and quantify the branches that are prone to fire. The formation of crystals. The researchers say the new approach will help large-scale commercial applications of lithium batteries. At present, lithium batteries are widely used in laptops and mobile phones, and it is also the "engine" for the development of next-generation electric vehicles. However, there is a major drawback in lithium batteries: after several charge and discharge cycles, especially after the lithium battery is rapidly charged, fine lithium fibers (dendrites) appear in the carbon anode, and these dendrites cause a short circuit. Causes the battery to overheat quickly and even explode.
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Using theoretical models, optical microscopy, and scanning electron microscopy to study the formation of dendrites, the researchers found a way to quantify the number of dendrites that have been formed, and to observe a 1 cm long cell using nuclear magnetic resonance imaging. A new method was verified in the chemical reactions taking place.