Harvesting energy from the mechanical motion has been demonstrated to be a preferable strategy to satisfy the requirements for self-powered electronics. Here we report a flexible and stable induction electrode based on graphene/Cu heterostructure, which is fabricated by electrodeposition and spin-coating, and is also utilized in energy harvesting for triboelectric nanogenerator (TENG). Typically, graphene dispersion prepared by physical exfoliation is spin-coated on the copper nanostructure based on PDMS. Besides, we provide favorable evidences that electrons transfer from graphene to copper, and ignite the reduced reaction of copper oxides. The function of graphene in avoiding the oxidation of copper nanostructure, thus improving the stability of graphene/Cu heterostructure and achieving its applications in triboelectric nanogenerator, is confirmed. The interactive mechanism is formulated, including energy barrier, metal work function and the electrochemical potential difference between graphene, copper and oxygen. The enhanced stability of graphene/Cu heterostructure is inspected by the chemical state of copper as the function of exposure time, and the applicability is also evaluated by their output electrical performance for TENG applications.

已经证明，从机械运动中收集能量是满足自供电电子设备要求的首选策略。在这里，我们报告了一种基于石墨烯/铜异质结构的柔性且稳定的感应电极，该电极是通过电沉积和旋涂工艺制造的，并且还用于摩擦电纳米发电机（TENG）的能量收集。通常，基于PDMS，将通过物理剥离制备的石墨烯分散体旋涂在铜纳米结构上。此外，我们提供了有利的证据，证明电子从石墨烯转移到铜，并点燃了氧化铜的还原反应。石墨烯在避免铜纳米结构氧化方面的功能，从而提高了石墨烯/铜异质结构的稳定性，并在摩擦电纳米发电机中获得了应用，被确认。阐述了相互作用机理，包括能垒，金属功函数以及石墨烯，铜和氧之间的电化学势差。通过铜的化学状态作为暴露时间的函数来检验石墨烯/铜异质结构的增强的稳定性，并且还通过其在TENG应用中的输出电性能来评估其适用性。