Gas breakdown is a common phenomenon in triboelectric nanogenerator (TENG) and a core limiting factor for pursuing high performance alternating-current TENG (AC-TENG) arising from contact electrification and electrostatic induction in atmosphere condition, and it is also especially crucial for elevating the output limit of the direct-current TENG (DC-TENG) from contact electrification and dielectric breakdown. Here, we propose a strategy for enhancing the output performance of DC-TENG among a wide range of atmosphere pressure in oxygen. Due to the elevation of both contact electrification and electrostatic breakdown, an oxygen-enhanced DC-TENG under ordinary pressure is realized with an eight-fold output power enhancement than that in atmospheric air. Our findings not only find a new method to enhance the output performance of DC-TENG, but also provide a novel insight of contact electrification from the perspective of gas atmosphere.

气体击穿是摩擦电纳米发电机（TENG）中的常见现象，是追求大气压条件下由于大气中的接触带电和静电感应而产生的高性能交流电TENG（AC-TENG）的核心限制因素，并且对于提高电击穿力也至关重要接触带电和介电击穿导致直流TENG（DC-TENG）的输出极限。在此，我们提出了在大范围的氧气中提高DC-TENG输出性能的策略。由于接触带电和静电击穿的升高，在常压下实现了氧气增强的DC-TENG，输出功率比大气中的输出功率提高了八倍。我们的发现不仅找到提高DC-TENG输出性能的新方法，