Release Time:2019-07-01  Hits:

Indexed by: Journal Article

Date of Publication: 2018-12-01

Journal: MATERIALS TODAY ENERGY

Included Journals: EI、SCIE

Volume: 10

Page Number: 108-117

ISSN: 2468-6069

Key Words: Magnesium/lithium hybrid ion battery; Manganese dioxide; Electrochemical properties; Metal doping; Energy storage

Abstract: High performance electrode materials are under tremendous focus for rechargeable energy storage systems. Herein, we report Ni-doped manganese oxide/CNT nanostructures as an effective cathode for ultra-long life magnesium/lithium hybrid ion battery (MLIB). The synthesized composite exhibited urchin like morphology, assembled with MnO2 nanoflakes. Electrochemical characterizations reveal excellent rate capacities with a maximum specific capacity of 175 mA h g(-1) at a current density of 20 mA g(-1). Dendrites free MLIB exhibits stable cycling of 3000 cycles with capacity retention of 87% at a current density of 1 A g(-1). Moreover, the influence of cutoff voltages on specific capacities and coulombic efficiencies has been analyzed. Ex-situ XRD and postmortem SEM/EDS analysis illustrates charge-discharge mechanism, and electrode/electrolyte redox reactions at different electrode potentials. (C) 2018 Elsevier Ltd. All rights reserved.