Singh, S and Chakraborty, A and Neveu, A and Jha, PK and Pralong, V and Fichtner, M and Islam, MS and Barpanda, P (2024) Alternative Polymorph of the Hydroxysulfate LixFeSO4OH Yields Improved Lithium-Ion Cathodes. In: Chemistry of Materials .
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Abstract
Use of sustainable electrode components in Li-ion battery technology is essential for large-scale applications while addressing environmental concerns. Considering elemental abundance, Fe-based compounds can, in principle, work as the most economic cathodes. Fe-based hydroxysulfates LixFeSO4OH (x = 0 -1) can be harnessed as low-cost, sustainable, high-voltage, and moisture-resistant battery cathode materials. In this system, monoclinic (m) FeSO4OH and layered m-FeSO4OH were previously reported as Li-ion battery cathode materials. Here, we introduce orthorhombic (o) FeSO4OH as a potential low-cost cathode for Li-ion batteries synthesized by using a facile low-temperature hydrothermal route. The o-FeSO4OH cathode delivers a reversible capacity of 100 mA h/g at a current rate of C/20 (1e- = 159 mAh/g) at a working potential of ca. 3.2 V vs Li+/Li. A higher overpotential and faster rate kinetics compared with that of m-FeSO4OH stem from the subtle deviations in the structural framework affecting the Li coordination environment. Operando analytical tools, electrochemical titration techniques, and computational modeling are combined to characterize the complex phase transformation during the (de)lithiation process. © 2024 The Authors. Published by American Chemical Society
| Item Type: | Journal Article |
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| Publication: | Chemistry of Materials |
| Publisher: | American Chemical Society |
| Additional Information: | The copyright for this article belongs to authors. |
| Keywords: | Chlorine compounds; Coordination reactions; Iron compounds; Layered semiconductors; Lithium compounds, American Chemical Society; Battery technology; Cathodes material; Electrode components; Environmental concerns; Fe-based; Ion batteries; Large-scale applications; Lithium-ion cathode; Low-costs, Lithium-ion batteries |
| Department/Centre: | Division of Chemical Sciences > Materials Research Centre |
| Date Deposited: | 19 Sep 2024 11:53 |
| Last Modified: | 19 Sep 2024 11:53 |
| URI: | http://eprints.iisc.ac.in/id/eprint/86098 |
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