Compositionally complex ball-in-ball type metal oxide anode via laser-induced fast fabrication for binder-free high-capacity Li-ion batteries

Beere, HK and Reddy, NS and Kulkarni, P and Samanta, K and Jung, HY and Ghosh, D (2024) Compositionally complex ball-in-ball type metal oxide anode via laser-induced fast fabrication for binder-free high-capacity Li-ion batteries. In: Journal of Energy Storage, 80 .

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Abstract

This study focuses on addressing the limited cycleability challenge of conversion-type anodes in rechargeable lithium-ion batteries (LIBs) by utilizing new high entropy materials with innovative fabrication techniques. This is the inaugural exploration of first-row transition metals (Fe, Co, Ni, Mn, Cr) composed in an entropically stabilized glycerate form (HEG) as an efficient LIB anode with a high reversible capacity exceeding 500 mAh/g (0.1 A/g) over 270 cycles. Further, we demonstrate an innovative rapid conversion of the HEG to a spinel phase high entropy oxide (HEO) via a CO2 laser treatment and demonstrate the fabrication of a binder-free anode comprising laser-induced reduced graphene oxide (rGO) and HEO ((Fe0.45Co0.14Ni0.2Cr0.13Mn0.08)3O4) composites. The composite (HEO@rGO) showed a high specific capacity of ~794 mAh/g (0.1 A/g) after 100 cycles and a specific capacity of ~530 mAh/g (0.5 A/g) after 200 cycles. These results surpass the performance of many previous reports on high entropy materials. The charge storage mechanism demonstrated the persistence of the spinel structure within HEO, accompanied by a partial transformation towards a rock salt configuration. The undulating nature of the cycling stability profile was found to be linked with a variation in charge transfer resistance and lithium diffusion with cycling. © 2023 Elsevier Ltd

Item Type:	Journal Article
Publication:	Journal of Energy Storage
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Elsevier Ltd.
Keywords:	Anodes; Carbon dioxide lasers; Charge transfer; Entropy; Fabrication; Graphene; Ions; Lithium compounds; Transition metals, Ball-type; Binder free; Binder-free anode; Glycerates; High entropy glycerate; High entropy oxide; Laser induced; Laser treatment; Metal oxide anodes; Reduced graphene oxides, Lithium-ion batteries
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	29 Feb 2024 07:12
Last Modified:	29 Feb 2024 07:12
URI:	https://eprints.iisc.ac.in/id/eprint/83899

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