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Indexed by:期刊论文

Date of Publication:2018-12-01

Journal:MATERIALS TODAY ENERGY

Included Journals:SCIE、EI

Volume:10

Page Number:108-117

ISSN No.: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.