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

Vidal, Elena and Rojo, José María and García-Alegre Sánchez, María del Carmen and Guinea, Domingo and Soto, Erika and 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.

Description

Title: Effect of composition, sonication and pressure on the rate capability of 5 V-LiNi0.5Mn1.5O4 composite cathodes
Author/s:
  • Vidal, Elena
  • Rojo, José María
  • García-Alegre Sánchez, María del Carmen
  • Guinea, Domingo
  • Soto, Erika
  • Amarilla, José Manuel
Item Type: Article
Título de Revista/Publicación: Electrochimica Acta
Date: October 2013
ISSN: 0013-4686
Volume: 108
Subjects:
Freetext Keywords: Lithium-ion batteries; Composite electrode; Electrode processing; Cathode material; 5V-LiNi0.5Mn1.5O4 spinel
Faculty: Centro de Automática y Robótica (CAR) UPM-CSIC
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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.

More information

Item ID: 32330
DC Identifier: http://oa.upm.es/32330/
OAI Identifier: oai:oa.upm.es:32330
DOI: 10.1016/j.electacta.2013.06.090
Official URL: http://www.sciencedirect.com/science/article/pii/S0013468613011961
Deposited by: Memoria Investigacion
Deposited on: 26 Oct 2014 12:45
Last Modified: 01 Nov 2015 23:56
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