AI Insight
Researchers used operando neutron radiography to observe lithium redistribution in thick-cathode all-solid-state batteries during calendar aging (storage without use). They discovered that lithium ions gradually migrate and redistribute within the cathode material over time, and demonstrated a reversible "back-diffusion" process where some lithium returns to its original position. This phenomenon affects battery performance and capacity retention during long-term storage.
Why it matters
Understanding how lithium redistributes during storage is critical for developing all-solid-state batteries with better shelf life and longevity. These findings could inform design strategies to minimize aging effects in next-generation solid-state batteries for electric vehicles and grid storage applications.
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