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Página principal > Artículos > Artículos publicados > Compositionally tuned NixSn alloys as anode materials for lithium-ion and sodium-ion batteries with a high pseudocapacitive contribution |
Fecha: | 2019 |
Resumen: | Nickel tin alloy nanoparticles (NPs) with tuned composition NixSn (0. 6 ≤ x ≤ 1. 9) were synthesized by a solution-based procedure and used as anode materials for Li-ion batteries (LIBs) and Na-ion batteries (SIBs). Among the compositions tested, Ni₀₉Sn-based electrodes exhibited the best performance in both LIBs and SIBs. As LIB anodes, Ni₀₉Sn-based electrodes delivered charge-discharge capacities of 980 mAh g⁻¹ after 340 cycles at 0. 2 A g⁻¹ rate, which surpassed their maximum theoretical capacity considering that only Sn is lithiated. A kinetic characterization of the charge-discharge process demonstrated the electrode performance to be aided by a significant pseudocapacitive contribution that compensated for the loss of energy storage capacity associated to the solid-electrolyte interphase formation. This significant pseudocapacitive contribution, which not only translated into higher capacities but also longer durability, was associated to the small size of the crystal domains and the proper electrode composition. The performance of NixSn-based electrodes toward Na-ion storage was also characterized, reaching significant capacities above 200 mAh g⁻¹ at 0. 1 A g⁻¹ but with a relatively fast fade over 120 continuous cycles. A relatively larger pseudocapacitive contribution was obtained in Ni Sn-based electrodes for SIBs when compared with LIBs, consistently with the lower contribution of the Na ion diffusion associated to its larger size. |
Ayudas: | Ministerio de Economía y Competitividad ENE2017-85087-C3 Ministerio de Economía y Competitividad ENE2016-77798-C4-3-R Ministerio de Economía y Competitividad ENE2015-63969-R Ministerio de Economía y Competitividad SEV-2013-0295 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-327 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-128 |
Derechos: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
Lengua: | Anglès |
Documento: | Article ; recerca ; Versió acceptada per publicar |
Materia: | Colloidal bimetallic nanoparticles ; Nickel tin alloy ; Anode materials ; Lithium-ion batteries ; Sodium-ion batteries |
Publicado en: | Electrochimica acta, Vol. 304 (Jan. 2019) , p. 246-254, ISSN 1873-3859 |
Postprint 21 p, 1.2 MB |