Bio-inspired Nanocomposite Membranes for Osmotic Energy Harvesting
Cheng Chen, Dan Liu, Li He, Si Qin, Jiemin Wang, Joselito M. Razal, Nicholas A. Kotov, Weiwei Lei
ayered membranes engineered with molecular-scale precision from aramid nanofibers and BN nanosheets simultaneously display high stiffness and tensile strength even when exposed to repeated pressure drops and salinity gradients. The total generated power density over large areas exceeded 0.6 W m −2 and was retained for as long as 20 cycles (200 h), demonstrating exceptional robustness. Furthermore, the membranes showed high performance in osmotic energy harvesting in unprecedentedly wide ranges of temperature (0°C–95°C) and pH (2.8–10.8) essential for the economic viability of osmotic energy generators.