Metal-Organic Frameworks Derived Nanocomposites of Mixed-Valent MnOx Nanoparticles In-Situ Grown on Ultrathin Carbon Sheets for High-Performance Supercapacitors and Lithium-Ion Batteries. (1st December 2017)

• Record Type: Journal Article
• Authors: Chen, Sijia; Cai, Daoping; Yang, Xuhui; Chen, Qidi; Zhan, Hongbing; Qu, Baihua; Wang, Taihong
• Is Part Of: Electrochimica acta. Volume 256(2017)
• Page Start: 63
• Page End: 72
• Publication Date: 2017-12-01
• Subjects: Manganese Oxide -- Metal-Organic Frameworks -- Carbon Sheets -- Supercapacitor -- Lithium-ion battery; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.10.016
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: Highlights: The nanocomposites of mixed-valent MnO x nanoparticles in-situ grown on ultrathin carbon sheets have been synthesized via a simple method. The mixed-valent MnO x nanoparticles are uniformly and firmly in-situ grown on the ultrathin carbon sheets. The MnO x -CSs-600 nanocomposite exhibits excellent performance for both supercapacitors and lithium-ion batteries. The present work would make contribution to the rational design and synthesis of carbon-based materials. Abstract: Manganese oxide and carbon hybrid materials have attracted intensive research attention as advanced electrode materials for energy storage. Herein, starting form metal-organic frameworks (MOFs), the nanocomposites of mixed-valent manganese oxide nanoparticles in-situ grown on ultrathin carbon sheets (MnO x -CSs nanocomposites) have been synthesized via a simple method. Benefiting from the unique structural merits, the nanocomposite obtained at 600 °C (MnO x -CSs-600) exhibits excellent performance for both supercapacitors (SCs) and lithium-ion batteries (LIBs). A high specific capacitance of 220 F g −1 is achieved at the current density of 1 A g −1 . An asymmetric supercapacitor (ASC) based on the MnO x -CSs-600 nanocomposite cathode and activated carbon anode exhibits a high energy density of 27.5 W h kg −1 at the power density of 225 W kg −1 . Moreover, the MnO x -CSs-600 nanocomposite displays a high reversible capacity of 1217.7 mA h g −1 at 200 mA g −1 after 160 cycles as an anode material for LIBs. Remarkably, the discharge capacity is still as high as 612.1 mA h g −1 even at high current density of 2000 mA g −1, indicating good rate capability. This synthetic strategy is quite simple, cost-effective and environmental friendly, which is highly promising for scaled-up production.