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论文类型：期刊论文

发表时间：2018-12-01

发表刊物：MATERIALS TODAY ENERGY

收录刊物：SCIE、EI

卷号：10

页面范围：108-117

ISSN号：2468-6069

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

摘要：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.