Manganese-Based Tunnel-Type Cathode Materials for Secondary Li-Ion and K-Ion Batteries

Vanam, SP and Senthilkumar, B and Amonpattaratkit, P and Barpanda, P (2022) Manganese-Based Tunnel-Type Cathode Materials for Secondary Li-Ion and K-Ion Batteries. In: Inorganic Chemistry, 61 (9). pp. 3959-3969.

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Abstract

The rational design of novel cathode materials remains a key pursuit in the development of (post) Li-ion batteries. Considering the relative ionic and Stokes radii and open frameworks with large tunnels, Na-based compounds can act as versatile cathodes for monovalent Li-ion and post-Li-ion batteries. Here, tunnel-type sodium insertion material Na0.44MnO2is demonstrated as an intercalation host for Li-ion and K-ion batteries. The rod-shaped Na0.44MnO2was synthesized by a solution combustion method assuming an orthorhombic structure (space group Pbam), which led to Na0.11K0.27MnO2(NKMO) and Na0.18Li0.51MnO2(NLMO) cathodes for K-ion batteries and Li-ion batteries, respectively, via facile electrochemical ion exchange from Na0.44MnO2. These new compositions, NKMO and NLMO, exhibited capacities of ∼74 and 141 mAh g-1, respectively (at a rate of C/20), with excellent cycling stability. The underlying mechanistic aspects (structural changes and charge storage mechanism) in these cathode compositions were probed by combining ex situ structural, spectroscopy, and electrochemical tools. Tunnel-type Na0.44MnO2forms a versatile cathode material for non-aqueous alkali-ion batteries.

Item Type:	Journal Article
Publication:	Inorganic Chemistry
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to the American Chemical Society.
Keywords:	Cathodes; Ion exchange; Ions; Lithium compounds; Manganese; Manganese compounds; Sodium compounds, Cathodes material; Insertion materials; Intercalation hosts; Ion batteries; Ionic radius; Large tunnels; Open frameworks; Rational design; Sodium insertions; Stokes radius, Lithium-ion batteries
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	01 Jul 2022 06:09
Last Modified:	01 Jul 2022 06:09
URI:	https://eprints.iisc.ac.in/id/eprint/73767

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