High-frequency supercapacitors based on carbonized melamine foam as energy storage devices for triboelectric nanogenerators. (January 2019)

• Record Type: Journal Article
• Authors: Zhao, Man; Nie, Jinhui; Li, Hu; Xia, Mengyang; Liu, Mingyang; Zhang, Zailei; Liang, Xiaoqiang; Qi, Ruijie; Wang, Zhong Lin; Lu, Xianmao
• Is Part Of: Nano energy. Volume 55(2019)
• Page Start: 447
• Page End: 453
• Publication Date: 2019-01
• Subjects: High-frequency supercapacitors -- Triboelectric nanogenerators -- Pulsed energy -- Energy storage; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2018.11.016
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: Triboelectric nanogenerators (TENG) are mechanical energy harvesting devices with pulsed output at frequencies ranging from a few to hundreds of hertz. Supercapacitors (SCs) are ideal energy storage devices for TENGs because of their high specific capacitance and excellent cycling performance, except that the poor high-frequency response of conventional supercapacitors limits their capability for storing pulsed energy at high frequencies. In this work, via a simple high-temperature carbonization process, we have fabricated carbonized melamine foams as electrode materials for high-frequency supercapacitors (HF-SCs). The resulting HF-SCs with a phase angle of − 80.1° and a specific areal capacitance of 132 μF cm −2 at 120 Hz were successfully employed as alternating current (ac) line filter for smoothing ripple current. When charged with a rotating TENG (R-TENG), the HF-SCs exhibited an energy utilization efficiency that is 20.3% higher than conventional activated carbon-based SCs, demonstrating the advantage of HF-SCs for storing pulsed energy generated by TENGs. Graphical abstract: fx1 Highlights: High-frequency supercapacitors (HF-SCs) were fabricated with melamine foams. A phase angle of − 80° at 120 Hz was achieved for filtering ripples of ac current. Charging by a rotating TENG with pulsed output at 1350 Hz was demonstrated. Efficiency of energy utilization was improved by 20.3% compared AC-SCs.