Fully Solar‐Powered Uninterrupted Highway Tunnel‐Lighting System Enabled by Cement‐Based Aqueous Ni‐Zn Structural Batteries

, as well as enough compressive strength to act as part of the tunnel structure. Specifically, the solar panels featuring a sustainable energy input can enable the charging of CNZSBs for energy storage and provide stable energy for LEDs during the day, while the fully-charged CNZSBs offer a steady output voltage for lighting at night. Such an uninterrupted lighting system provides exciting opportunities for developing energy storage in building materials and exploiting renewable energy sources.