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Article Dans Une Revue Thin Solid Films Année : 2014

Surface modification of positive electrode materials for lithium-ion batteries

Résumé

The advanced lithium-ion batteries are critically important for a wide range of applications, from portable electronicsto electric vehicles. The research on their electrodes aims to increase the energy density and the powerdensity, improve the calendar and the cycling life, without sacrificing the safety issues. A constant progressthrough the years has been obtained owing to the surface treatment of the particles, in particular the coatingof the nanoparticles with a layer that protects the core region from side reactions with the electrolyte, preventsthe loss of oxygen, and the dissolution of the metal ions in the electrolyte, or simply improve the conductivity ofthe powder. The purpose of the presentwork is to present the different surfacemodifications that have been triedfor three families of positive electrodes: layered, spinel and olivine frameworks that are currently considered aspromising materials. The role of the different coats used to improve either the surface conductivity, or the thermalstability, or the structural integrity is discussed
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Dates et versions

hal-01095309 , version 1 (15-12-2014)

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C.M. Julien, A. Mauger, H. Groult, K. Zaghib. Surface modification of positive electrode materials for lithium-ion batteries. Thin Solid Films, 2014, 572 (7), pp.200-207. ⟨10.1016/j.tsf.2014.07.063⟩. ⟨hal-01095309⟩
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