Abstract：
Triboelectric nanogenerators (TENGs) have become reliable green energy harvesters by converting biomechanical motions into electricity. However, the inevitable charge leakage and poor electric field (EF) of conventional TENG result in inferior tribo-charge density on the active layer. In this paper, TiO2-MXene incorporated polystyrene (PS) nanofiber membrane (PTMx NFM) charge trapping interlayer is introduced into single electrode mode TENG (S-TENG) to prevent electron loss at the electrode interface. Surprisingly, this charge-trapping mechanism augments the surface charge density and electric output performance of TENGs. Polyvinylidene difluoride (PVDF) mixed polyurethane (PU) NFM is used as tribo-active layer, which improves the crystallinity and mechanical property of PVDF to prevent delamination during long cycle tests. Herein, the effect of this double-layer capacitive model is explained experimentally and theoretically. With optimization of the PTMx interlayer thickness, S-TENG exhibits a maximum open-circuit voltage of (280 V), short-circuit current of (20 µA) transfer charge of (120 nC), and power density of (25.2 µW cm-2). Then, this energy is utilized to charge electrical appliances. In addition, the influence of AC/DC EF simulation in wound healing management (vitro L929 cell migration, vivo tissue regeneration) is also investigated by changing the polarity of trans-epithelial potential (TEP) distribution in the wounded area.
摘要：
摩擦电纳米发电机（TENG）通过将生物力学运动转换为电能，已成为可靠的绿色能量收集器。然而,传统TENG的不可避免的电荷泄漏和弱电场(EF)导致有源层上的摩擦电荷密度差。在本文中,将TiO2-MXene掺入聚苯乙烯（PS）纳米纤维膜（PTMxNFM）电荷捕获中间层引入单电极模式TENG（S-TENG），以防止电极界面处的电子损失。令人惊讶的是,这种电荷捕获机制增强了TENG的表面电荷密度和电输出性能。聚偏氟乙烯（PVDF）混合聚氨酯（PU）NFM用作摩擦活性层，这改善了PVDF的结晶度和机械性能，以防止在长周期测试中的分层。在这里，实验和理论上解释了这种双层电容模型的影响。随着PTMx中间层厚度的优化，S-TENG的最大开路电压为（280V），短路电流（20µA）转移电荷（120nC），功率密度为（25.2µWcm-2）。然后，这种能量被用来给电器充电。此外,AC/DCEF模拟在伤口愈合管理中的影响(体外L929细胞迁移，体内组织再生）还通过改变受伤区域的跨上皮电位（TEP）分布的极性进行了研究。
