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Advanced Sodium Storage Property in Exfoliated MoO3 Anode: The Stability and Performance Improvement by in-situ Impedance Mapping

Abstract

An inexpensive energy storage, impeding fast capacity fading is the conquistador in today’s consumer market of daily-drivers. An oxide-based sodium battery electrode is an inexpensive candidate nonetheless solving the fading issue. Here, the fading issue has been resolved by understanding the electrochemical stability followed by material modification. An exfoliated metal oxide (α-MoO3) maintaining well crystallinity, contouring a stable material phase is inspected to ameliorate the storage property. Herein, we incept an amenable technique, in-situ impedance mapping to perceive the electrochemical stability just after cell fabrication. The result reflects an initial OCV instability which is depicted as a regular increase in Rct. Hence, sufficient rest (30 hr) has imposed to reach stable OCV, after which the anode is subjected to ensnare Na-ion. In conjunction with an inexpensive, additive-free organic electrolyte system, the modified anode material (rGO-MoO3) performs reversibly to store ~0.75 Ah mass specific (gm) capacity with adequate capacity retention till 100 cycles. We believe the understanding and the adoptable appraisal of impedance mapping will advance the next generation energy storage systems.

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Publication details

The article was received on 01 Jul 2017, accepted on 11 Sep 2017 and first published on 11 Sep 2017


Article type: Paper
DOI: 10.1039/C7TA05711C
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Advanced Sodium Storage Property in Exfoliated MoO3 Anode: The Stability and Performance Improvement by in-situ Impedance Mapping

    A. Roy, P. K. Dutta and S. Mitra, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA05711C

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