Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, 100083, China; School of Materials Science an Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
Adv Mater. 2014 Jun 18;26(23):3788-96. doi: 10.1002/adma.201400021. Epub 2014 Apr 1.
Effectively harvesting ambient mechanical energy is the key for realizing self-powered and autonomous electronics, which addresses limitations of batteries and thus has tremendous applications in sensor networks, wireless devices, and wearable/implantable electronics, etc. Here, a thin-film-based micro-grating triboelectric nanogenerator (MG-TENG) is developed for high-efficiency power generation through conversion of mechanical energy. The shape-adaptive MG-TENG relies on sliding electrification between complementary micro-sized arrays of linear grating, which offers a unique and straightforward solution in harnessing energy from relative sliding motion between surfaces. Operating at a sliding velocity of 10 m/s, a MG-TENG of 60 cm(2) in overall area, 0.2 cm(3) in volume and 0.6 g in weight can deliver an average output power of 3 W (power density of 50 mW cm(-2) and 15 W cm(-3)) at an overall conversion efficiency of ∼ 50%, making it a sufficient power supply to regular electronics, such as light bulbs. The scalable and cost-effective MG-TENG is practically applicable in not only harvesting various mechanical motions but also possibly power generation at a large scale.
有效地收集环境机械能是实现自供电和自主电子产品的关键，它解决了电池的局限性，因此在传感器网络、无线设备和可穿戴/植入式电子设备等领域有巨大的应用。在这里，开发了一种基于薄膜的微光栅摩擦电纳米发电机 (MG-TENG)，通过机械能转换实现高效发电。自适应形状的 MG-TENG 依赖于互补的微线性光栅阵列之间的滑动起电，为从表面相对滑动运动中获取能量提供了一种独特而直接的解决方案。在滑动速度为 10 m/s 的情况下，面积为 60 cm²、体积为 0.2 cm³、重量为 0.6 g 的 MG-TENG 可以在总转换效率约为 50%的情况下提供平均输出功率为 3 W（功率密度为 50 mW cm⁻² 和 15 W cm⁻³），足以满足常规电子设备（如灯泡）的供电需求。这种可扩展且具有成本效益的 MG-TENG 不仅可实际应用于收集各种机械运动，还可大规模进行发电。
