Layered Sodium Manganese Oxide Na2Mn3O7 as an Insertion Host for Aqueous Zinc-ion Batteries

Sada, K and Barpanda, P (2019) Layered Sodium Manganese Oxide Na2Mn3O7 as an Insertion Host for Aqueous Zinc-ion Batteries. In: MRS Advances, 4 (49). pp. 2651-2657.

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Abstract

Aqueous rechargeable batteries are attractive owing to their higher operational safety, high ionic conductivity, scalable and easy manufacturing. These aqueous batteries form an economic option for large-scale (grid) power storage. In the aqueous battery sector, Mn-based compounds are highly attractive with their non-toxic nature, low-cost, rich mineral chemistry and robust operational safety. Several Mn-based systems like LiMn2O4 spinel and LiNi1/3Mn1/3Co1/3O2 have seen successful commercialization. Pursuing Mn-based materials, we have shown layer structured Na2Mn3O7 as a versatile cathode material for non-aqueous systems like Li-, Na- and K-ion batteries. In the current work, we have exploited Na2Mn3O7 as a cathode material for aqueous Zn-ion battery for the first time. This Na-Mn-O ternary system was prepared using two-step emulsion-based synthesis. The phase-pure Na2Mn3O7 was formed in a triclinic structure with a space group of P-1. It exhibited versatile electrochemical insertion of different ions like Li-, Na- and K-ions involving phase transition. Na2Mn3O7 exhibited reversible Zn-ion intercalation delivering capacity of 245 mA h g-1 with a nominal voltage of 1.5 V. Upon discharge, it triggered phase transformation to an unknown phase. Layered Na2Mn3O7 oxide was found to act as an efficient cathode for Zn-ion batteries with good cycling stability.

Item Type:	Journal Article
Publication:	MRS Advances
Publisher:	Materials Research Society
Additional Information:	The copyright for this article belongs to Materials Research Society.
Keywords:	Cathode materials; Cathodes; Cobalt compounds; Electric power system economics; Emulsification; Ions; Lithium compounds; Manganese oxide; Mineral industry; Nickel compounds; Secondary batteries; Zinc; Zinc compounds, Aqueous batteries; Delivering capacity; Electrochemical insertion; Ion intercalation; Mineral chemistry; Non-aqueous system; Operational safety; Triclinic structures, Sodium compounds
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	02 Dec 2022 09:31
Last Modified:	02 Dec 2022 09:31
URI:	https://eprints.iisc.ac.in/id/eprint/78185

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