Binder-free and flexible delta-MnO2@multiwalled carbon nanotubes as high-performance cathode material for aqueous magnesium ion battery. (13th August 2021)

• Record Type: Journal Article
• Authors: Zhang, Daile; Ma, Youliang; Zhang, Jianghua; Sun, Ting
• Is Part Of: Nanotechnology. Volume 32:Number 44(2021)
• Publication Date: 2021-08-13
• Subjects: binder-free electrode -- δ-MnO2 -- multiwalled carbon nanotubes -- magnesium ion battery; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ac197d
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: In order to develop a high-performance electrode material for aqueous magnesium ion battery (AMIB), we report a binder-free and flexible δ -MnO2 @multiwalled carbon nanotubes on carbon cloth ( δ -MnO2 @MWCNTs/CC) composite by a simple hydrothermal method. The MnO2 nanoflakes are deposited on the surface of CC coated with high conductivity MWCNTs to form three-dimensional hierarchy architecture, which improves the electrochemical performances. The δ -MnO2 @MWCNTs/CC electrode displays a discharge capacity of 246.7 mAh g −1 at a current density of 50 mA g −1 and its capacitance retention at a current density of 1000 mA g −1 can reach 80% after 2000 cycles. Furthermore, the AMIB system is assembled by δ -MnO2 @MWCNTs/CC as cathode and activated carbon as anode, which dispays a discharge capacity of 72.4 mAh g −1 at 100 mA g −1 . The δ -MnO2 with interlayer structure can provide sufficient space for the insertion/deinsertion of Mg 2+ ions into/from the lattice of host materials without the change of phase. This work prepares a high-performance and flexible electrode material for low-cost AMIB system.