Effect of composition, sonication and pressure on the rate capability of 5 V-LiNi0.5Mn1.5O4 composite cathodes

Vidal, Elena; Rojo, José María; García-Alegre Sánchez, María del Carmen; Guinea, Domingo; Soto, Erika y Amarilla, José Manuel (2013). Effect of composition, sonication and pressure on the rate capability of 5 V-LiNi0.5Mn1.5O4 composite cathodes. "Electrochimica Acta", v. 108 ; pp. 175-181. ISSN 0013-4686. https://doi.org/10.1016/j.electacta.2013.06.090.

Descripción

Título: Effect of composition, sonication and pressure on the rate capability of 5 V-LiNi0.5Mn1.5O4 composite cathodes
Autor/es:
  • Vidal, Elena
  • Rojo, José María
  • García-Alegre Sánchez, María del Carmen
  • Guinea, Domingo
  • Soto, Erika
  • Amarilla, José Manuel
Tipo de Documento: Artículo
Título de Revista/Publicación: Electrochimica Acta
Fecha: Octubre 2013
Volumen: 108
Materias:
Palabras Clave Informales: Lithium-ion batteries; Composite electrode; Electrode processing; Cathode material; 5V-LiNi0.5Mn1.5O4 spinel
Escuela: Centro de Automática y Robótica (CAR) UPM-CSIC
Departamento: Otro
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Positive composite electrodes having LiNi0.5Mn1.5O4 spinel as active material, a blend of graphite and carbon black for increasing the electrode electrical conductivity and either polyvinyldenefluoride (PVDF) or a blend of PVDF with a small amount of Teflon® (1 wt%) for building up the electrode. They have been processed by tape casting on an aluminum foil as current collector using the doctor blade technique. Additionally, the component blends were either sonicated or not, and the processed electrodes were compacted or not under subsequent cold pressing. Composites electrodes with high weight, up to 17 mg/cm2, were prepared and studied as positive electrodes for lithium-ion batteries. The addition of Teflon® and the application of the sonication treatment lead to uniform electrodes that are well-adhered to the aluminum foil. Both parameters contribute to improve the capacity drained at high rates (5C). Additional compaction of the electrode/aluminum assemblies remarkably enhances the electrode rate capabilities. At 5C rate, remarkable capacity retentions between 80% and 90% are found for electrodes with weights in the range 3–17 mg/cm2, having Teflon® in their formulation, prepared after sonication of their component blends and compacted under 2 tonnes/cm2.

Más información

ID de Registro: 32330
Identificador DC: http://oa.upm.es/32330/
Identificador OAI: oai:oa.upm.es:32330
Identificador DOI: 10.1016/j.electacta.2013.06.090
URL Oficial: http://www.sciencedirect.com/science/article/pii/S0013468613011961
Depositado por: Memoria Investigacion
Depositado el: 26 Oct 2014 12:45
Ultima Modificación: 01 Nov 2015 23:56
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