Yang Weixu, Ma Zepeng, Yang Suqing, Hu Yanqiang, Zhang Lu
Department of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Shunde Innovation School, University of Science and Technology Beijing, Foshan 528399, China.
Nanoscale. 2024 Nov 28;16(46):21447-21455. doi: 10.1039/d4nr03126a.
Contact-separation mode triboelectric nanogenerators (CS-TENG) have received widespread attention in self-powered cathodic corrosion protection, but their relatively low output limits the application. This paper introduced both groove textures and carbon-fillers into CS-TENG and investigated the influences and mechanism of textures and filler parameters on the output of CS-TENG. Through the external connection to the protected metal, the CS-TENG with optimal textures and fillers established the power supply of the self-powered cathodic protection. It is shown that for CS-TENG with groove textures, a texture size of 10 μm-10 μm exhibits the maximum lateral deformation, which generates the largest contact area and lateral deformation, and thus outputs the highest voltage. Among the three selected carbon-fillers (carbon fibers, hard carbon particles, graphene oxide), carbon fibers with 0.5 wt% mass fraction provide the highest charge storage capacity and thus the largest electrical output. Compared to the CS-TENG without textures and fillers, the open-circuit voltage of CS-TENG with optimal textures and fillers increased by 165.08%. Cathode anti-corrosion experiments and EIS (electrochemical impedance spectroscopy) tests indicate that CS-TENG with optimal textures and fillers significantly reduce the electron transfer rate on the metal surface, exhibiting excellent anti-corrosion performance.
接触-分离模式摩擦纳米发电机（CS-TENG）在自供电阴极腐蚀防护方面受到了广泛关注，但其相对较低的输出限制了其应用。本文将沟槽纹理和碳填料引入CS-TENG，并研究了纹理和填料参数对CS-TENG输出的影响及机制。通过与被保护金属的外部连接，具有最佳纹理和填料的CS-TENG建立了自供电阴极保护的电源。结果表明，对于具有沟槽纹理的CS-TENG，10μm-10μm的纹理尺寸表现出最大的横向变形，产生最大的接触面积和横向变形，从而输出最高电压。在所选的三种碳填料（碳纤维、硬碳颗粒、氧化石墨烯）中，质量分数为0.5 wt%的碳纤维具有最高的电荷存储容量，从而产生最大的电输出。与无纹理和填料的CS-TENG相比，具有最佳纹理和填料的CS-TENG的开路电压提高了165.08%。阴极防腐实验和电化学阻抗谱（EIS）测试表明，具有最佳纹理和填料的CS-TENG显著降低了金属表面的电子转移速率，表现出优异的防腐性能。
