The high‐rate capability of solid‐state, rechargeable lithium batteries with sulfide electrolytes is significantly improved when the LiCoO2 particles are spray‐coated with a Li4Ti5O12 film with a thickness of several nanometers (see figure). The power densities of the solid‐state battery with the coated LiCoO2 are comparable to those of commercialized lithium‐ion cells.
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