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【Joule】Natural evaporation-maintained scalable day-and-night osmotic power generation

时间：2026-04-10来源：国际前沿科学研究院点击：213

Sunmiao Fang , Chunxiao Zheng , Huan Lu 1, Xiaofeng Jiang , Jiajun Wang , Weicun Chu , Juncheng Sun , Jin Tan , Bingkun Tian , Jun Yin , Zhuhua Zhang , Xiuqiang Li* , Wanlin Guo*

Joule（IF:35.4），Available online 26 March 2026


Summary

Photovoltaic systems are widely applied but intermittent. Osmotic power can generate electricity from ion concentration gradients, but it is difficult to maintain high efficiency over large membrane areas for viable application. Here, we developed a large-area Nafion/graphene oxide membrane with optimized energy barrier engineering for efficient osmotic power generation, achieving a record power density of 8.5 W m−2 (0.3 V, 12 mA) with a single-cell device on a 1 cm2 scale, more than one order of magnitude higher than previous reports. The output remains stable day and night, under daytime one-sun illumination, enabling non-intermittent green energy conversion. A large-scale module consisting of 400 units connected in series delivers 100 V to directly power electronic devices such as mobile phones. Moreover, we successfully fabricated a 1,000 cm2 device with the Nafion/graphene oxide membrane, achieving 0.66 W m−2 (0.3 V, 0.9 A) with a single device, setting a record for large-area osmotic systems.


DOI:https://doi.org/10.1016/j.joule.2026.102359

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