Magnetic PDMS@SiO2/Fe3O4 composite friction layer material for enhanced triboelectric nanogenerator output performanceShaojun Zhang, Zhirao Yin, Tianshu Wang, Rui Sun, Qianyong Zhang, Chun Zhao, Youzhi Wang and Mingyu WangSci. Tech. Energ. Transition, 80 (2025) 23DOI: https://doi.org/10.2516/stet/2024097