Direct-current triboelectric nanogenerator (DC-TENG) arising from electrostatic breakdown exhibits unique merits over conventional alternating-current TENGs, such as the constant-current output and high output charge density. The selection of appropriate triboelectric material pair (TMP) is important for improving its performance. Here, we propose a universal strategy for the TMP selection of DC-TENG by simultaneously considering the friction, dielectric and triboelectric performance. Based on assessing five basic parameters in DC-TENG, including the friction coefficient, surface charge density, leakage current, breakdown charge density and breakdown efficiency, it is found that the thermoplastic urethanes (TPU)-ethylene-tetra-fluoro-ethylene (ETFE) pair presents considerable output performance. Finally, a micro-structured DC-TENG with a designed power-management circuit was fabricated to further demonstrate the enhanced performance of DC-TENG with TPU-ETFE as the TMP. This work provides an effective strategy to select appropriate TMPs to optimize the performance of DC-TENG, facilitating its practical applications.

由静电击穿产生的直流摩擦纳米发电机 (DC-TENG) 与传统的交流 TENG 相比具有独特的优点，例如恒流输出和高输出电荷密度。选择合适的摩擦电材料对（TMP）对于提高其性能非常重要。在这里，我们通过同时考虑摩擦、介电和摩擦电性能，提出了 DC-TENG TMP 选择的通用策略。基于评估 DC-TENG 的五个基本参数，包括摩擦系数、表面电荷密度、泄漏电流、击穿电荷密度和击穿效率，发现热塑性聚氨酯 (TPU)-乙烯-四氟乙烯 (ETFE) ) 对呈现相当大的输出性能。最后，制造了具有设计的电源管理电路的微结构 DC-TENG，以进一步证明以 TPU-ETFE 作为 TMP 的 DC-TENG 的增强性能。这项工作提供了一种有效的策略来选择合适的 TMP 来优化 DC-TENG 的性能，促进其实际应用。