Engineering a Robust and Salt‐Rejecting Solar Evaporator for Scalable and Sustainable Desalination

Interfacial solar evaporation is a promising green strategy for addressing global freshwater scarcity; however, its practical deployment is hindered by challenges, including salt accumulation, insufficient mechanical durability, and limited system functionality. To this end, we designed and fabricated a crossnetwork fabric evaporator (PPy/CT‐CN) that synergistically enhances light absorption, thermal localization, water transport, and mechanical strength by combining the high‐efficiency photothermal properties of poly(pyrrole) (PPy) with the excellent hydrophilicity of cotton towels (CT) within an architecturally optimized macroscopic framework. The PPy/CT‐CN evaporator not only achieved a high evaporation rate of 1.95 kg m −2 h −1 under 1 solar irradiation (1 kW m −2 ) with remarkable salt tolerance (maintaining stable operation in 10 wt% brine) and structural durability, but also enabled simultaneous freshwater and electricity generation when integrated with a thermoelectric generator (TEG), reaching a maximum power density of 180.86 mW m −2 . The integration of a large‐scale evaporator with multiple TEG modules effectively validates the system's scalability. This study effectively addresses salt accumulation in solar evaporation, and its water‐electricity cogeneration design significantly boosts energy efficiency, offering a viable technical strategy for developing practical, scalable solar‐driven water, and power generation systems.