Particle cracking or fracture is a common phenomenon that can occur in the active materials used in lithium-ion batteries, particularly in the cathode. This is because the cathode material undergoes repeated cycles of lithium ion insertion and extraction during charge and discharge, which can cause stress on the particles.
When the cathode particles undergo stress, they can develop cracks or fractures, which can lead to a decrease in the battery's capacity and performance over time. In addition, the broken particles can also generate unwanted side reactions with the electrolyte, leading to further degradation of the battery.
There are several factors that can contribute to particle fracture in lithium-ion battery cathodes, including the particle size, morphology, and surface area of the active material, as well as the specific cathode chemistry and cycling conditions.
Researchers are actively exploring ways to mitigate particle fracture in lithium-ion battery cathodes through the development of new materials with improved mechanical stability and the use of innovative electrode designs and cycling protocols.
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