An overview of hydroxy-based polyanionic cathode insertion materials for metal-ion batteries

Singh, S and Lochab, S and Sharma, L and Pralong, V and Barpanda, P (2021) An overview of hydroxy-based polyanionic cathode insertion materials for metal-ion batteries. In: Physical Chemistry Chemical Physics, 23 (34). pp. 18283-18299.

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Abstract

Rechargeable batteries based on Li-ion and post Li-ion chemistry have come a long way since their inception in the early 1980s. The last four decades have witnessed steady development and discovery of myriads of cathode materials taking into account their processing, economy, and performance along with ecological sustainability. Though oxides rule the battery sector with their high energy and power density, polyanionic insertion compounds work as gold mines for designing insertion compounds with rich structural diversity leading to tuneable redox potential coupled with high structural/chemical/thermal stability. The scope of polyanionic compounds can be taken a step further by combining two or more different types of polyanions to get suites of mixed polyanionic materials. While most cathodes are built with metal polyhedra constituted by oxygen (MOm|XOm, M = 3d metals, X = P, S, Si, B, W, etc., m = 3-6), in some cases, selected oxygen sites can form bonding with hydrogen to form OH/H2O ligands. It can lead to the family of hydroxy-based mixed-polyanionic cathode materials. The presence of hydroxy components can affect the crystal structure, local chemical bonding, and electronic, magnetic, diffusivity and electrochemical properties. Employing a mineralogical survey, the current review renders a sneak peek on various hydroxy-based polyanionic cathode materials for Li-ion and post Li-ion batteries. Their crystal structure, and electrochemical properties have been overviewed to outline future research focus and scope for real-life application. © 2021 the Owner Societies.

Item Type:	Journal Article
Publication:	Physical Chemistry Chemical Physics
Publisher:	Royal Society of Chemistry
Additional Information:	The copyright for this article belongs to Royal Society of Chemistry
Keywords:	Bonding; Cathode materials; Cathodes; Chemical bonds; Crystal structure; Electrochemical properties; Metal ions; Metals; Oxygen; Redox reactions, Chemical bondings; Ecological sustainability; Insertion compounds; Insertion materials; Li-ion chemistry; Polyanionic materials; Real-life applications; Structural diversity, Lithium-ion batteries
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	03 Dec 2021 07:07
Last Modified:	03 Dec 2021 07:07
URI:	http://eprints.iisc.ac.in/id/eprint/70137

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