The development of direct current triboelectric nanogenerators (DC-TENGs) is of great significance to powering the electronic devices with low consumption. Thus, a bidirectional direct current triboelectric nanogenerator with the mechanical rectifier (BD-TENG) is proposed in this article, which can convert alternating current (AC) generated in the forward and reversed directions into direct current (DC) output without a bridge rectifier. The BD-TENG is comprised of the mechanical structure component, the triboelectric power-generation unit, and the mechanical rectifier. With the operation of the mechanical structure component, AC output generated by the triboelectric power-generation unit is converted into direct current output with the assistance of the mechanical rectifier. The fluorinated ethylene propylene (FEP) films are fabricated into the micro arch structure in the triboelectric power-generation unit, which can harvest the energy in the forward and reversed directions and reduce the friction and wear between materials. And its optimum width is determined through a series of experiments. In addition, the mechanical rectifier is constitutive of the rolling electric brushes and the commutator, which has the advantages of simple structure and low wear. Finally, the BD-TENG can illumine 210 light-emitting diodes (LEDs) and power a commercial calculator directly due to the DC output.

直流摩擦纳米发电机（DC-TENGs）的发展对于为低功耗的电子设备供电具有重要意义。因此，本文提出了一种带有机械整流器的双向直流摩擦电动发电机（BD-TENG），该发电机可以将正向和反向产生的交流电（AC）转换为直流电（DC）输出，而无需桥式整流器。BD-TENG由机械结构部件，摩擦发电单元和机械整流器组成。通过机械结构部件的操作，由摩擦发电单元产生的交流输出在机械整流器的帮助下转换为直流输出。在摩擦发电单元中，将氟化乙烯丙烯（FEP）薄膜制成微拱结构，从而可以收集正向和反向的能量，并减少材料之间的摩擦和磨损。其最佳宽度是通过一系列实验确定的。另外，机械整流器由滚动电刷和换向器组成，具有结构简单，磨损少的优点。最后，BD-TENG可以照亮210个发光二极管（LED），并直接由于DC输出而为商用计算器供电。其最佳宽度是通过一系列实验确定的。另外，机械整流器由滚动电刷和换向器组成，具有结构简单，磨损少的优点。最后，BD-TENG可以照亮210个发光二极管（LED），并直接由于DC输出而为商用计算器供电。其最佳宽度是通过一系列实验确定的。另外，机械整流器由滚动电刷和换向器组成，具有结构简单，磨损少的优点。最后，BD-TENG可以照亮210个发光二极管（LED），并直接由于DC输出而为商用计算器供电。