Simultaneous Solar‐driven Steam and Electricity Generation by Cost‐effective, Easy Scale‐up MnO ₂ ‐based Flexible Membranes

Harvesting solar energy in an effective manner for steam and electricity generation is a promising technique to simultaneously cope with the water crises. However, construction of efficient easy scale-up photothermal materials cogeneration remains challenging. Herein, we report facile cost-effective strategy prepare MnO2-decorated cotton cloth (MCx). The wide adsorption spectrum excellent conversion ability situ-formed MnO2 nanoparticles make MCx be advanced materials. Consequently, hybrid device integrated as layer thermoelectric (TE) module power exhibits extremely high evaporation rate 2.24 kg m−2 h−1 under 1 kW irradiation, which ranked among most powerful evaporators. More importantly, during evaporation, produces open-circuit voltage 0.3 V output 1.6 W 3 Sun outperforms previously reported solar-driven devices. Therefore, synergistic solar-thermal utilization opens up green way toward simultaneous vapor electric remote resource-constrained areas.