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Researchers solved the mystery of how soft lithium dendrites crack the hard ceramic inside solid-state batteries, triggering short circuits. The breakthrough could help engineers build safer, longer-lasting batteries for smartphones, electric vehicles, and other electronics.

Any loss of lithium reduces the capacity and service life of lithium batteries. Recent research suggested that lithium is lost to the current collector during charging. Researchers at Ruhr University Bochum, Germany, working with Professor Tong Li at the Helmholtz Institute Ulm a