Chimie Douce Derived Novel P2-Type Layered Oxide for Potassium-Ion Batteries

Jha, PK and Golubnichiy, A and Sachdeva, D and Banerjee, A and Sai Gautam, G and Fichtner, M and Abakumov, AM and Barpanda, P (2024) Chimie Douce Derived Novel P2-Type Layered Oxide for Potassium-Ion Batteries. In: Advanced Functional Materials .

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Abstract

The emergence of K-ion batteries (KIBs) heralds a promising frontier in energy storage technology, offering the potential for high specific energy density, long cycle life, and robust power capabilities, all while utilizing the abundant resources of potassium. In response to the challenges posed by synthetic intricacies related to K-based cathodes, the effort is directed toward employing soft chemistry (chimie douce) method to unveil a hitherto-unknown P2-type K1/3Co1/3Mn2/3O2 (KCM) layered oxide cathode for KIBs. Comprehensive analysis using diffraction, microscopy, and spectroscopy tools reveals the ion exchange reaction proceeds through overlay ordered structure formation mechanism. The as-prepared KCM material serves as a �2.9 V positive K+ insertion host. Further, it showcases an exceptional structural reversibility, robust cycling performance with �100 coulombic efficiency even after 100 cycles, and maintaining electrochemical stability even at elevated temperature (c.a. 40° and 50 °C). The KCM cathode exhibits in-plane Co�Mn ordering and solid-solution redox mechanism during (de)potassiation. Combining first-principles calculations with experimental tools, this research demonstrates the efficacy of ambient ion-exchange route in stabilizing promising cathode materials for KIBs. This innovative synthetic approach not only streamlines synthetic complexities, but also holds significant implications for the advancement of KIB technology for stationary energy storage. © 2024 Wiley-VCH GmbH.

Item Type:	Journal Article
Publication:	Advanced Functional Materials
Publisher:	John Wiley and Sons Inc
Additional Information:	The copyright for this article belongs to John Wiley and Sons Inc.
Keywords:	Energy storage; Ion exchange; Ions; Potassium; Secondary batteries; Storage (materials), Chimie douce; Cycle lives; Energy storage technologies; Ion batteries; Layered oxides; Long cycles; P2 layer oxide; Potassium ions; Potassium-ion battery; Specific energy density, Cathodes
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	09 Sep 2024 11:36
Last Modified:	09 Sep 2024 11:36
URI:	http://eprints.iisc.ac.in/id/eprint/85988

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