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High-performance Sodium Anode Comprised of Few-Layer of MoSe2 and N, P Doped Reduced Graphene Oxide Composites

Abstract

Renewable energy revolution and its practically reminds and predicts the need for large solar storage options. Lithium-ion battery chemistries may remain top of the choice and performance, however cost-per-kWh effective solution kicks this area, and researchers stick to sodium-ion chemistry as a large storage option. One of the main research areas in rechargeable sodium-ion battery is an anode solution since the saleable graphite anode is incompatible for SIBs as its larger radius (0.98 Å Vs 0.69 Å of Li+) leads to sluggish Na-ion transport during the cycling process. Our team is continuously working on the development of chalcogenides based anode for sodium-ion battery and the reaction mechanism. In this work, we prepared MoSe2 and MoSe2-N, P-doped rGO composites (Latter denoted as MoSe2/NPr) as an active anode for sodium-ion battery. The morphology and electrochemical properties have been characterised sensibly and compare with the bare MoSe2 electrode. The MoSe2-NPr composite delivers 337 mA h g–1at 0.1 A g–1 after 100 cycles and 244.4 mA h g–1 at 1 A g–1; these values are higher than that of MoSe2/rGO (225.6 mA h g–1 at 0.1 A g–1) and MoSe2 electrodes (206 mA h g–1 at 0.1 A g–1). The excellent performance of MoSe2/NPr is attributed to the interconnected doped rGO sheets that provide sufficient active sites for MoSe2 with improved conductivity and reducing volume expansion during the cycling process. In addition, sodium storage mechanism is investigated by ex-situ several physical and microscopic studies.

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Publication details

The article was received on 12 Apr 2018, accepted on 28 Jun 2018 and first published on 29 Jun 2018


Article type: Research Article
DOI: 10.1039/C8QI00331A
Citation: Inorg. Chem. Front., 2018, Accepted Manuscript
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    High-performance Sodium Anode Comprised of Few-Layer of MoSe2 and N, P Doped Reduced Graphene Oxide Composites

    A. Roy, A. Ghosh, A. Kumar and S. Mitra, Inorg. Chem. Front., 2018, Accepted Manuscript , DOI: 10.1039/C8QI00331A

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