Division of Smart Textile Convergence Research , DGIST , Daegu 42988 , Republic of Korea.
Department of Materials Science and Engineering , Yonsei University , Seoul 03722 , Republic of Korea.
ACS Appl Mater Interfaces. 2019 Mar 6;11(9):9301-9308. doi: 10.1021/acsami.8b20143. Epub 2019 Feb 22.
Applications in the field of portable and wearable electronics are becoming multifunctional, and the achievement of transparent electronics extensively expands the applications into devices such as wearable flexible displays or skin-attachable mobile computers. Moreover, the self-charging power system (SCPS) is the core technique for realizing portable and wearable electronics. Here, we propose a transparent and flexible multifunctional electronic system in which both an all-in-one SCPS and a touch sensor are combined. A single-layer graphene (SLG) film was adapted as an electrode for the supercapacitor, touch sensor, and a triboelectric nanogenerator (TENG), thus making an electronic system that is ultrathin, lightweight, transparent, and flexible. Capacitive-type transparent and flexible electronic devices can be simultaneously used as an electrochemical double-layer capacitance-based supercapacitor and as a sensitive, fast-responding touch sensor in a single-device architecture by inserting a separator of polyvinyl alcohol-lithium chloride-soaked polyacrylonitrile electrospun mat on polyethylene naphthalate between two symmetric SLG film electrodes. Furthermore, a transparent all-in-one SCPS was fabricated by laminating a TENG device with a supercapacitor, and high-performance electric power generation/storage capability is demonstrated.
应用领域的便携式和可穿戴电子设备正变得多功能化，透明电子的实现广泛地将应用扩展到可穿戴柔性显示器或可附着在皮肤上的移动计算机等设备中。此外，自充电电源系统（SCPS）是实现便携式和可穿戴电子设备的核心技术。在这里，我们提出了一种透明灵活的多功能电子系统，其中集成了一个全能的 SCPS 和一个触摸传感器。单层石墨烯（SLG）薄膜被用作超级电容器、触摸传感器和摩擦纳米发电机（TENG）的电极，从而制造出超薄、超轻、透明和灵活的电子系统。通过在两个对称的 SLG 薄膜电极之间的聚对苯二甲酸乙二醇酯上插入聚乙烯醇-氯化锂浸泡的聚丙烯腈电纺毡的隔板，电容式透明和灵活的电子设备可以同时用作基于电化学双层电容的超级电容器，以及作为在单个器件结构中具有灵敏、快速响应的触摸传感器。此外，通过将 TENG 装置与超级电容器层压，制造出透明的一体化 SCPS，并展示了高性能的电能产生/存储能力。
