Triboelectric polymer with high charge density is the foundation to promote the wide range of applications of triboelectric nanogenerators. This work develops a method to produce triboelectric polymer based on repeated rheological forging. The fluorinated ethylene propylene film fabricated by repeated forging method not only has excellent mechanical properties and good transmittance, but also can maintain an ultrahigh tribo-charge density. Based on the film with a thickness of 30 μm, the output charge density from contact-separation nanogenerator reaches 352 μC·m⁻². Then, the same film is applied for the nanogenerator with air-breakdown mode and a charge density of 510 μC·m⁻² is further achieved. The repeated forging method can effectively regulate the composition of surface functional groups, the crystallinity, and the dielectric constants of the fluorinated ethylene propylene, leading to the superior capability of triboelectrification. Finally, we summarize the key parameters for elevating the electrification performance on the basis of molecular structure and related fabrication crafts, which can guide the further development of triboelectric polymers.

高电荷密度的摩擦电聚合物是促进摩擦电纳米发电机广泛应用的基础。这项工作开发了一种基于重复流变锻造生产摩擦电聚合物的方法。采用重复锻造法制造的氟化乙烯丙烯薄膜不仅具有优良的力学性能和良好的透光率，而且可以保持超高的摩擦电荷密度。基于30 μm厚度的薄膜，接触分离纳米发电机的输出电荷密度达到352 μC·m ^-2。然后，将相同的薄膜应用于空气击穿模式的纳米发电机，电荷密度为510 μC·m ^-2进一步实现。重复锻造的方法可以有效调节氟化乙烯丙烯的表面官能团组成、结晶度和介电常数，从而产生优异的摩擦起电能力。最后，我们从分子结构和相关制造工艺的基础上总结了提高带电性能的关键参数，以指导摩擦电聚合物的进一步发展。