The triboelectric nanogenerator (TENG) is in the spotlight due to its advantages of material and processing diversity. Despite these advantages, for its practical utilization, the output performance of the TENG still needs to be enhanced. Unlike most of the previous approach to increase triboelectricity between two contact surfaces, in this paper, the output performance is significantly enhanced by improving the electrical charge induction through employment of a stably pre-charged electret. The main advantages of the proposed strategy is stable long term output enhancement of the TENG. For the first time, the eminent concept of “quality of electrical charges” on the electret is proposed as the degree of helpfulness of the electrical charges to enhance the electrical output performance of the TENG. In this regard, a procedure to develop the electret with high quality electrical charges in deep traps, which determines long-term performance of the TENG, is systematically investigated to maximize the amount of electrical charges and simultaneously minimize their escape to the external environment. In consequence, unlike existing studies only focusing on immediate enhancement of electrical output performance of the TENG with electret, this study provides the strategy to stably enhance the output performance for a long time. This strategy becomes dominant especially with weak contact force generating small oscillation without strong contact between two materials. Thus, using the developed electret, enhanced and reliable performance of the energy harvester is further demonstrated as a proof of niche application to effectively harvest energy from weak vibration of an automobile engine.

摩擦电纳米发电机（TENG）由于其材料和工艺多样性的优势而备受关注。尽管具有这些优点，但由于TENG的实际应用，仍然需要提高其输出性能。与大多数以前的增加两个接触面之间的摩擦电的方法不同，在本文中，通过使用稳定的预充电驻极体来改善电荷感应，从而显着提高了输出性能。提出的策略的主要优点是TENG的长期稳定输出增强。首次提出将驻极体上的“电荷质量”这一突出概念作为电荷对增强TENG的电输出性能的帮助程度。在这方面，系统地研究了在深阱中开发具有高质量电荷的驻极体的程序，该程序决定了TENG的长期性能，以最大化电荷量并同时最小化其向外部环境的逸出。因此，与现有研究仅关注立即增强带驻极体的TENG的电输出性能不同，本研究提供了长期稳定地提高输出性能的策略。尤其是在微弱的接触力产生小的振动而两种材料之间没有强力接触的情况下，这种策略就变得尤为重要。因此，使用发达的驻极体，