Potassium intercalation into sodium metal oxide and polyanionic hosts: Few case studies

Sada, K and Murugesan, C and Baskar, S and Barpanda, P (2018) Potassium intercalation into sodium metal oxide and polyanionic hosts: Few case studies. In: 233rd Meeting of the Electrochemical Society, 13 - 17 May 2018, Seattle, pp. 207-214.

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Abstract

Layered sodium metal oxide Na2Mn3C>7 and mixed polyanion Na4Fe3(P04)2P207cathode materials were prepared by facile solid-state route and solution combustion synthesis respectively. The Na4Mn3O7compound crystallized in triciinic structure with space group P-\, whereas Na4Fe3(PC>4)2P207 assumed an orthorhombic structure with space group Pn2\a. Here, both these sodium-based materials are presented as intercalation hosts for K-ion batteries for the first time. An initial discharge capacity of 152 mAh g'1 was realized with a nominal voltage of 2.1 V vs K/K+ for Na2Mn307. The reversible K-ion (de) intercalation in Na4Fej(PO.02P2O7 was observed with high capacity of 116 mAh g"1 with average potential of 3.2 V vs K/K+ with fast rate capability and good cycling stability. These sodium-based materials act as robust insertion hosts for secondary potassium-ion batteries.

Item Type:	Conference Paper
Publication:	ECS Transactions
Publisher:	Electrochemical Society Inc.
Additional Information:	The copyright for this article belongs to the Electrochemical Society Inc.
Keywords:	Combustion synthesis; Ions; Metals; Secondary batteries, Average potential; Cycling stability; Initial discharge capacities; Intercalation hosts; Nominal voltage; Orthorhombic structures; Solid-state routes; Solution combustion synthesis, Sodium compounds
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	19 Aug 2022 05:31
Last Modified:	19 Aug 2022 05:31
URI:	https://eprints.iisc.ac.in/id/eprint/75989

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