Polyanionic (Phosphates, Silicates, Sulfates) Frameworks as Electrode Materials for Rechargeable Li (or Na) Batteries

Abstract

For more than 20 years, most of the technological achievements for the realization of positive electrodes for practical rechargeable Li battery systems have been devoted to transition metal oxides such as LixMO2 (M = Co, Ni, Mn), LixMn2O4, LixV2O5, or LixV3O8. The first two classes of materials built on close-packed oxygen stacking adopt bidimensional and tridimensional crystal structures, respectively (Figure 1), from which lithium ions may be easily intercalated or extracted in a reversible manner. These oxides are reasonably good ionic and electronic conductors, and lithium insertion/extraction proceeds while operating on the M4+/M3+ redox couple, located between 4 and 5 V versus Li+/Li...

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Affiliated Institutions

• Université de Bordeaux FR
• Centre National de la Recherche Scientifique FR
• Laboratoire de Réactivité et Chimie des Solides FR
• Université de Picardie Jules Verne FR
• Réseau sur le Stockage Electrochimique de l'énergie FR
• Institut de Chimie de la Matière Condensée de Bordeaux FR

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