Triboelectric nanogenerators(TENGs)have potential to achieve energy harvesting and condition monitoring of oils,the"lifeblood"of industry.However,oil absorption on the solid surfaces is a great challenge for oil-solid TENG(O-TENG).Here,oleophobic/superamphiphobic O-TENGs are achieved via engineering of solid surface wetting properties.The designed O-TENG can generate an excellent electricity(with a charge density of 9.1 μC m-2 and a power density of 1.23 mW m-2),which is an order of magnitude higher than other O-TENGs made from polytetrafluoroethylene and polyimide.It also has a significant durability(30,000 cycles)and can power a digital thermometer for self-powered sensor applications.Further,a superhigh-sensitivity O-TENG monitoring system is successfully developed for real-time detecting particle/water contaminants in oils.The O-TENG can detect particle contaminants at least down to 0.01 wt％and water contaminants down to 100 ppm,which are much better than previous online monitoring methods(particle＞0.1 wt％;water＞1000 ppm).More interesting,the developed O-TENG can also distinguish water from other contaminants,which means the devel-oped O-TENG has a highly water-selective performance.This work provides an ideal strategy for enhancing the output and durability of TENGs for oil-solid contact and opens new intelligent pathways for oil-solid energy harvesting and oil condition monitoring.

Jun Zhao;Di Wang;Fan Zhang;Jinshan Pan;Per Claesson;Roland Larsson;Yijun Shi

Division of Machine Elements,Department of Engineering Sciences and Mathematics,Lule? University of Technology,971 87 Lule?,Sweden;Department of Engineering and Design,School of Engineering and Informatics,University of Sussex,Brighton BN1 9RH,UK;Division of Surface and Corrosion Science,Department of Chemistry,KTH Royal Institute of Technology,100 44 Stockholm,Sweden

纳微快报（英文）

[1]Jun Zhao;Di Wang;Fan Zhang;Jinshan Pan;Per Claesson;Roland Larsson;Yijun Shi-.Self-Powered,Long-Durable,and Highly Selective Oil-Solid Triboelectric Nanogenerator for Energy Harvesting and Intelligent Monitoring)[J].纳微快报（英文）,2022(10):95-107

TENGs,oleophobic,superamphiphobic

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