Wearable or portable electronic devices are ubiquitous because those enrich our life considering comfortability, efficiency and healthcare. However, those devices are nothing but accessories without electric power. Exchanging or recharging batteries are not always reachable for the devices. Energy harvesting systems which harvest energy from human motions are a good alternative or assist for batteries to secure electric power. Among other energy harvesters, a triboelectric generator (TEG) has attracted much interest with respect to its simplicity and lightweight. Many works have been done to enhance performance of TEGs to apply them for practical uses. Among them, introduction of structures on surface is a rational approach because triboelectricity is a contact electrification. In this review, works of enhancement of TEG’s output performance are highlighted with respect to structural modification on the surface of triboelectric films. Molding or imprinting straightforwardly introduces micro-, nano-, or hierarchical structures on triboelectric surfaces and the TEG with a film of pyramidal structures exhibited up to 800% increase in the output compared with flat ones. Porous structures with pores on and inside polymeric films also showed up to 800% increase in the output. And TEGs based on nano-fibers with hierarchical structures on them showed up to around 2000% improvement in electrical outputs.

可穿戴或便携式电子设备无处不在，因为考虑到舒适性、效率和医疗保健，它们丰富了我们的生活。然而，这些设备只不过是没有电力的配件。这些设备并不总是可以更换或充电电池。从人体运动中收集能量的能量收集系统是一种很好的替代方案或辅助电池以确保电力。在其他能量收集器中，摩擦发电机 (TEG) 因其简单和轻便而引起了人们的极大兴趣。已经进行了许多工作来提高 TEG 的性能以将其应用于实际用途。其中，在表面引入结构是一种合理的方法，因为摩擦电是一种接触带电。在这次审查中，在摩擦电薄膜表面的结构改性方面，突出了 TEG 输出性能的增强工作。成型或压印直接在摩擦电表面引入微米、纳米或分层结构，与平面结构相比，具有金字塔结构薄膜的 TEG 的输出增加了 800%。在聚合物薄膜上和内部带有孔的多孔结构也显示出高达 800% 的输出增加。基于具有分层结构的纳米纤维的 TEG 显示电输出提高了约 2000%。或摩擦电表面上的分层结构和具有金字塔结构薄膜的 TEG 与平面相比，输出增加了 800%。在聚合物薄膜上和内部带有孔的多孔结构也显示出高达 800% 的输出增加。基于具有分层结构的纳米纤维的 TEG 显示电输出提高了约 2000%。或摩擦电表面上的分层结构和具有金字塔结构薄膜的 TEG 与平面相比，输出增加了 800%。在聚合物薄膜上和内部带有孔的多孔结构也显示出高达 800% 的输出增加。基于具有分层结构的纳米纤维的 TEG 显示电输出提高了约 2000%。