High-Energy-Density Asymmetric Supercapacitor Based on a Durable and Stable Manganese Molybdate Nanostructure Electrode for Energy Storage Systems

• DOI: 10.1021/acsaem.0c00393
• Publication Date: 2020-05-23T17:46:32Z
• Authors: Zhihui Xu; Shishuai Sun; Yue Han; Zepeng Wei; Yanhua Cheng; Shougen Yin; Wen Cui
• Keywords: Power density; Nanosheet

3D interconnected MnMoO4 nanosheet arrays with abundant open spaces and ordered arrangements deposited on nickel foam (NF@MnMoO4) are fabricated by a mild one-step hydrothermal method. As an integrated binder-free electrode for supercapacitors, the optimized NF@MnMoO4 exhibits super-high specific capacitance of 4609 F g–1 (640 mAh g–1) at current density 1 A g–1, remarkable rate capability (2800 (388.89 even as high 20 g–1), outstanding cycling stability (92.4% initial after 20,000 cycles). The NF@MnMoO4//AC asymmetric supercapacitors (ASCs) excellent performance Coulombic efficiency achieve ultrahigh energy 107.38 Wh kg–1 power 801.34 W (72.18 3987.85 kg–1). practical application, self-charging packs commercial solar cells ASCs demonstrated to LED without extra recharging other devices, indicating their promising applications in self-power energy-harvesting storage systems.