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Título: | High-Voltage Stabilization of O3-Type Layered Oxide for Sodium-Ion Batteries by Simultaneous Tin Dual Modification |
Autor: | Song, Tengfei; Chen, Lin; Gastol, Dominika; Dong, Bo; Marco, J.F. CSIC ORCID CVN ; Berry, Frank; Slater, Peter; Reed, Daniel; Kendrick, Emma | Fecha de publicación: | 10-may-2022 | Editor: | American Chemical Society | Citación: | Chemistry of Materials 34(9): 4153–4165 (2022) | Resumen: | O3-type layered oxide materials are considered to be a highly suitable cathode for sodium-ion batteries (NIBs) due to their appreciable specific capacity and energy density. However, rapid capacity fading caused by serious structural changes and interfacial degradation hampers their use. A novel Sn-modified O3-type layered NaNi1/3Fe1/3Mn1/3O2 cathode is presented, with improved high-voltage stability through simultaneous bulk Sn doping and surface coating in a scalable one-step process. The bulk substitution of Sn4+ stabilizes the crystal structure by alleviating the irreversible phase transition and lattice structure degradation and increases the observed average voltage. In the meantime, the nanolayer Sn/Na/O composite on the surface effectively inhibits surface parasitic reactions and improves the interfacial stability during cycling. A series of Sn-modified materials are reported. An 8%-Sn-modified NaNi1/3Fe1/3Mn1/3O2 cathode exhibits a doubling in capacity retention increase after 150 cycles in the wide voltage range of 2.0-4.1 V vs Na/Na+ compared to none, and 81% capacity retention is observed after 200 cycles in a full cell vs hard carbon. This work offers a facile process to simultaneously stabilize the bulk structure and interface for the O3-type layered cathodes for sodium-ion batteries and raises the possibility of similar effective strategies to be employed for other energy storage materials. | Descripción: | 13 pags., 6 figs. | Versión del editor: | https://doi.org/10.1021/acs.chemmater.2c00522 | URI: | http://hdl.handle.net/10261/269890 | DOI: | 10.1021/acs.chemmater.2c00522 | ISSN: | 0897-4756 |
Aparece en las colecciones: | (IQF) Artículos |
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Fichero | Descripción | Tamaño | Formato | |
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High-Voltage Stabilization.pdf | Artículo principal | 14,16 MB | Adobe PDF | Visualizar/Abrir |
Supporting information.pdf | Supporting information | 1,81 MB | Adobe PDF | Visualizar/Abrir |
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