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Solid-state electrolytes (SSEs) with high ionic conductivity, wide electrochemical stability window and operating temperature window, are promising to replace flammable organic liquid electrolytes for high energy/power density and safe battery systems. However, the processing of SSE components in all-solid-state lithium batteries (ASSLBs) is challenging due to the intrinsic brittleness, air sensitivity, high sintering temperature (for garnet-type SSEs), and poor solid-solid contact. Here, using garnet-type SSEs as a model system, we report rapid laser processing to tackle these processing challenges. First, rapid laser sintering can be used to densify porous LLZO green body with minimal Li loss. Reactive laser sintering can be used to synthesize pure LLZO phase from precursor mixtures. Local laser heating is capable of generating dense/porous bilayers or gradient porous structures. It provides versatile tunability to …